CA1187467A - Valve construction and method of making the same - Google Patents
Valve construction and method of making the sameInfo
- Publication number
- CA1187467A CA1187467A CA000423500A CA423500A CA1187467A CA 1187467 A CA1187467 A CA 1187467A CA 000423500 A CA000423500 A CA 000423500A CA 423500 A CA423500 A CA 423500A CA 1187467 A CA1187467 A CA 1187467A
- Authority
- CA
- Canada
- Prior art keywords
- annular
- stem
- seal
- seal member
- peripheral portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
- F16K5/0257—Packings
- F16K5/0285—Packings spindle sealing
Abstract
ABSTRACT OF THE DISCLOSURE
A valve construction and method of making the same are provided, the valve construction comprising a housing having a valve chamber therein, a valve member rotatably carried by the housing in the valve chamber thereof and having a valve stem extending from, the chamber, and a seal unit carried by the housing to prevent leakage from the valve chamber to the exterior of the housing and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween, the seal unit comprising a pair of annular metallic retainers press-fitted together in telescoping, relation and holding the annular seal member therebetween in compressed sealed relation therewith.
A valve construction and method of making the same are provided, the valve construction comprising a housing having a valve chamber therein, a valve member rotatably carried by the housing in the valve chamber thereof and having a valve stem extending from, the chamber, and a seal unit carried by the housing to prevent leakage from the valve chamber to the exterior of the housing and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween, the seal unit comprising a pair of annular metallic retainers press-fitted together in telescoping, relation and holding the annular seal member therebetween in compressed sealed relation therewith.
Description
~7~
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention relates to an improved valve con-struction having improved seal means therefor as well as -to a method of making such a valve construction.
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention relates to an improved valve con-struction having improved seal means therefor as well as -to a method of making such a valve construction.
2. Description of the Prior Art ~ . _.
It is known to proYide a valYe construction that comprises a housing means having a valve chamber therein, a valve means rotatably carried by the housing means in the valYe chamber thereof and having a valve stem exter.ding from the valve chamber, and seal means carried by the housing means to prevent leakage from the chamber to the ext~rior of the housing means and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween.
SUMMARY OF THE INVENTION
It is one feature of this invention to provide an improved valve construction which has improved seal means therefor O
In particular, it was found according to the teachings of this invention that the seal means for sealing the valve stem ~f a valve means so as to prevent leakage from the valve chamber to the exterior of -the housing means carrying the valve means can be formed in a unique manner to prevent such leakage even in the evPnt -that an external fire or other adverse even-t has destroyed the conventional polymeric seal structure of the seal means whereby the improved seal means of this invention is substantially fire-proof.
For example, one embodiment of this inven-tion provides -2- ~
~L~g37~i7 a valve construction comprising a housing means having a valve chamber therein, a valve means rotatably carried by the housing means in the valve chamber thereof and having a valve stem extending from the valve chamber, and seal means carried by the housing means to prevent leakage from the chamber to the ex-terior of the housing means and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween, the seal means comprising a pair of annular metallic retainers press-fitted together in telescoping relation and holding the annular seal member therebetween in compressed sealed relation therewith, the retainers having annular facing surfaces compressing the seal member therebetween, and the facing surfaces being disposed to generally taper toward each other in a direction substantially transverse to and away from the stem.
In another embodiment the invention provides a seal means as aforementioned for use in a valve construction.
Other uses and advantages of this invention are apparent from a reading of this description which proceeds with reference to the accompanying drawings forming a part thereof and wherein:
BRIEF` DESCRIPTION OF THE DRAWINGS
FIG. 1 is an enlarged fragmentary cross-sectional view of the improved valve construction of this invention.
FIG. 2 is a cross-sectional view of the improved seal sub-assembly of this invention utilized for part of the seal means of the valve construction of FIG. 1.
It is known to proYide a valYe construction that comprises a housing means having a valve chamber therein, a valve means rotatably carried by the housing means in the valYe chamber thereof and having a valve stem exter.ding from the valve chamber, and seal means carried by the housing means to prevent leakage from the chamber to the ext~rior of the housing means and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween.
SUMMARY OF THE INVENTION
It is one feature of this invention to provide an improved valve construction which has improved seal means therefor O
In particular, it was found according to the teachings of this invention that the seal means for sealing the valve stem ~f a valve means so as to prevent leakage from the valve chamber to the exterior of -the housing means carrying the valve means can be formed in a unique manner to prevent such leakage even in the evPnt -that an external fire or other adverse even-t has destroyed the conventional polymeric seal structure of the seal means whereby the improved seal means of this invention is substantially fire-proof.
For example, one embodiment of this inven-tion provides -2- ~
~L~g37~i7 a valve construction comprising a housing means having a valve chamber therein, a valve means rotatably carried by the housing means in the valve chamber thereof and having a valve stem extending from the valve chamber, and seal means carried by the housing means to prevent leakage from the chamber to the ex-terior of the housing means and having an annular seal member sealing against and completely around the stem while permitting rotational movement therebetween, the seal means comprising a pair of annular metallic retainers press-fitted together in telescoping relation and holding the annular seal member therebetween in compressed sealed relation therewith, the retainers having annular facing surfaces compressing the seal member therebetween, and the facing surfaces being disposed to generally taper toward each other in a direction substantially transverse to and away from the stem.
In another embodiment the invention provides a seal means as aforementioned for use in a valve construction.
Other uses and advantages of this invention are apparent from a reading of this description which proceeds with reference to the accompanying drawings forming a part thereof and wherein:
BRIEF` DESCRIPTION OF THE DRAWINGS
FIG. 1 is an enlarged fragmentary cross-sectional view of the improved valve construction of this invention.
FIG. 2 is a cross-sectional view of the improved seal sub-assembly of this invention utilized for part of the seal means of the valve construction of FIG. 1.
- 3 -7a~7 FIG. 3 is an exploded perspective view of t~e parts of the seal sub-assembly illustrated in ~IG. 2.
FIG. 4 is a schematic cross-sectional view illus-trating one of the steps of this invention for making the metal diaphragm for the seal means of the valve construction of FIG. 1.
- FIG. 5 is a view similar to FIG. 4 and illustrates another step in the method of this invention fvr making the metal diaphragm for the seal means of the valve construction of FIG. 1.
ESCRIPTION OF THE P'C?I~ 5ul~-NT
While the various features of this invention are hereinafter illustrated and described as providing a fire-safe top seal means for a particular valve construction, it is to be understood that the various features of this inven-tion can be utilized singly or in any cornbination thereo~ to provide other types o~ seal means for other types of valve constructions as desired.
Therefore, -this invention is not to be limited to only the embodiment illustrated in the drawings, because the drawings are merely utilized to illustrate one of the ~ide variety of uses of this invention.
Referring now to FIG. 1, the improved valve con-struction of this invention is generally indicated by the reference num~ral 2~ and comprises a housing means 21 having a valve chamber 22 therein that rotatably receives a valve member 23 therein in a manner well known in the art, such as in a plug valve construction or the like, the valve member 23 naving a valve stem or shank 24 extending from the valve cnamber 22 and being provided with a flattened end 25 to which 7~67 suitable hub and wrench structure (n~t shown) or the like can be attached for rotating the valve member 23 to various operating positions in the valve chamber 22 of the housing means 21 to control fluid flow therethrough in a manner well known in the art and for any desired purpose.
~he valve construction 20 includes improved seal - Means of this invention that is generally indicated by the reference numeral 26 in the drawings and is utilized for pre-venting fluid leakage from the chamber 22 to the exterior of the housing means 21 by sealing against and completely around the valve stem 24 and to the housing means 21 in a manner here-inafter set forth.
In addition, the sealing means 26 of this invention uniquely provides a substantially fire-safe top seal means for the valve construction 20 so that even if the polymeric sealing parts thereof are destroyed by fire, high temperatures or other adverse effects, the improved seal means 26 of this invention will still prevent fluid leaka~e from the valve chamber 22 to the exterior of the housing means 21 so that such fluid controlled by the valve construction 20 can not provide a hazard itself, such as feeding a fire that caused the partial destruction of the seal means 26 in the first place should such fluid be a flammable liquid such as a petro-leum product or the like.
The seal means 26 of this invention includes a self-contained seal sub-assembly -that is ~enerally indicated by the reference numeral 27 in FI~S. 2 and 3 and will now be described.
The seal sub-assembly 27 comprises a pair of annu-lar metallic retainers or thrust collar rings 28 and 29 ~8'7~
adapted to be press-fitted together in a telescoping relation in a manner hereinafter se-t forth to hold an annular seal member 3~ between tapering surfaces 31 and 32 of the respec-tive re-tainers 28 and 29, the tapering surfaces 31 and 32 tapering towards each other as the surfaces 31 and 32 extend in a direction substantially transversely away from the valve stem 24 as illustrated in FIG. 1, While the annular seal member 30 can be formed of any suitable material that will provide a seal function and be sub-stantially fireproof, one embodiment of the seal means 26 ofthis invention that has proved satisfactory has the annular seal member 30 made from a m~terial that is substantially pure graphite and that is sold under the Trademark "Grafoil tl by the Union Car-bide Corporation of 270 Park Avenue, New York, New York.
The annular seal ~nember 30 has a substantially trapezoidal cross-sectional configuration that defines opposed large and small bases 34 and 33 thereof joined to-gether by angled sides 35 which respectively are disposed in engaging sealing relation with the tapering sides 31 and 32 of the retainers 28 and 29, the large base 34 being dis-posed inboard of the retainers 28 and 29 for its sealing purpose as will be apparent hereinafter.
The outer ring or retainer 28 has an annular sur-face 36 intersecting with the tapering surface 31 thereof and being substantially concen-trically disposed relative to the stem 24 as illustrated in FI~. 1.
The inner ring or retair.er 29 also has a surface 37 tnat is adapted to face the surface 36 of the outer re~ainer 28 and intersects with the tapering surface 32 thereof 9 the sur-face 37 generally being concentrically and facing outwardly 37~7 from the stem 24 as illustrated in FIG. 1 but having an angledportion 38 thereof adjacent the surface 32 -thereof for permitting a portion 39 of the annular seal member 30 to be forced between the portion 38 of the surface 37 of retainer 29 and the facing surface 36 of the retainer 28 as illustrated in FIG. 1 when the seal member 30 is compressed between the retainers 28 and 29 not only during the assembling of the retainer 29 within the retainer 28 in a manner hereinafter set forth, but also when the seal sub-assembly 27 is forced onto the stem 24 into the position illustra*ed in FIG. 1.
The seal sub-assembly 27 is adjusted in the valve construction by adjusting screws 40 threadedly carried in threaded bores 41 in a cover member 42 of the housing means 21 which are subsequently turned in a *ightening direction to cause the ends 43 of the adjusting screws 40 to bear down-wardly on the upper surface 44 of the retainer 28 to tend to move the seal sub-assembly 27 downwardly in FIG. 1 for a purpose hereinaf-ter described.
The seal sub-assembly 27 includes a metallic dia-phragm 45 having an inner peripheral portion 46 disposed inpress-fit relation between the facing surfaces 36 and 37 of the press-fit retainers 28 and 29 while the outer peripheral portion 47 thereof is adapted to e~tend generally trans-versely away from the valve stem 24 to not only engage against an annular surface 48 of the housing means 21, but also to nave itSouter peripheral end 49 bearing against an annular sealing member 50 disposed in an annular groove 51 formed in the housing means 21 immediately adjacent and outboard of the surface 48 as illustrated in FIG. 1.
3D While the annular seal member 50 can be any suitable 7fl,~6'7 material which will provide a sealing function and be substantially fire-proof, in one embod~ment of the seal means 26 of this invention, the annular seal means 50 is formed of the same material as the annular seal member 30 previously described.
Also, while the metal diaphragm 45 can be formed of any suitable meterial and of any suitable thickness in order to be substantially fire proof, it has been found that the same can comprise stainless steel and be shaped into the configuration illustrated in FIG. 1 in a manner hereinafter set forth.
The outer peripheral portion 47 of the metal diaphragm 45 is held against the annular surface 48 of the housing means 21, as well as against the annular seal member 50, by a cooperating surface 52 on the cover member 42 which has an annular beveled edge ~3 which mates with the pre-bent and angled peripheral end 49 of the metal diaphragm 45 as illus~
trated in FIG. 1 to mate with the annular surface 48 and the annular seal member 50 when the cover member 42 is bolted by ~uitable bolts ~not shown) against the housing means 21 as illust-rated in FIG. 1 to permit the threaded adjusting means 40 to adjust its compressive force on the seal means 26 for the sealing purpose previously described.
The sealing means 26 includes a formed sealing diaphragm 54 having an outer peripheral portion 55 provided with an annular bead 5Ç received in an annular groove 57 formed in the housing means 21 outboard of an annular surface 58 thereof which is received in an annular groove 59 formed in tne outer peripheral portion 55 of the diaphragm 54 as illustra~d in FI~. 1, the annular groove 57 in ~he housing ;7 means 21 having sufficient clearance to permit radial outward expansion of the diaphragm 54 when under compression by the cover member 42 as will be apparent hereinafter whereby the groove 51 comprises an expansion groove for the 5 diaphragm 54.
The diaphragm 54 has i-ts inner peripheral portion 60 shaped to be disposed over an annular wedge shaped sealing ring 61 disposed on an annular shoulder 62 of valve member 23 so that the inner peripheral portion 60 of the diaphragm 54 10 forms a lip seal that is disposed in sealing engagement with the valve stem 24 as illustrated, the retainer 29 of the seal sub-assembly 27 having an internal substantially L-shaped annular surface 63 that cooperates with the inner peripheral portion 60 of the seal diaphragm 54 to hold the same against 15 the annular wedge seal 61 and urge the same into sealing engagement with the sralve st~ 24 as illustrated.
While the flexible seal diaphragm 54 and the wedge seal member 61 can be formed of any suitable polymeric material to perforIn a sealing function to fluid seal the chamber 22 of 20 the housing means 21 to the exterior of the valve construction 20 between the surface 58 of the housing means 21 and the valve stem 24, it has been found that tne same can be formed of a plastic material sold under the Trademark "PT~E Teflon" and made by the E. I. DuPont de Nemours Company of 1007 ~arket 25 Street, Wilmington, Delaware. If desired~ such plastic material for the wedge ring or seal 61 can be glass filled.
~ nile the metal diaphragm 45 of this inven-tion can be formed in any suitable manner into the configuration illustrated in EIGS. 1-3, one method of t}is invention for 30 shaping the diaphragm 45 is illust-rated in ~IGS. 4 and 5 _9_ i57 and will now be described.
As illustrated in ~IG. 4~ the metal diaphragm 45 has a central opening 64 formed therethrough so the same is adapted to be disposed over a cylindrical shank 65 of a male die member 66 having a frusto-conical section 67 joined to an outwardly directed flat annular portion 68 -that shapes the metal diaphragm 45 into the configuration illustrated in FIG, 4 when a female die member 69 has its cooperating surface means that comprises an angled surface means 70 and annular flat surface means 71 respectively cooperating with the surfaces 67 and 68 of the male die member 66 when mated therewith as illustrated in ~IG. 4.
Subsequently, when the male die member 66 is removed from the female die member 69, the outer peripheral end 49 of tne metal diaphragm 45 can be formed against an angled surface 72 of the female die member 69 in any suitable manner, such as by tapping the same against the angled surface 72 with a suitable tool completely around the entire periphery of the diaphragm 45 in order to provide the pre-bent end 49 for the sealing purpose with the annular seal member 50 as previously described.
Thus it can be seen that even though the inner peripheral portion 46 of the preformed diaphragm 45 is initially angled at less than 90 with the outer peripheral portion 47 thereof when the diaphragm 45 is removed from the die members 66 and 69, the inner peripheral portion 46 of the diaphragm 45 is subsequently bent approximately 90 relative to the outer peripheral portion 47 thereof during the assembly of the inner peripneral portion 46 or the diaphragm 45 with the retainers 28 and 29 in their subsequent press-fit relation as illustrated --10 _ in FIGS. 1 and 2.
Therefore, it can be seen that it is a relatively simple method of this invention to form the metal diaphragm 45 to permi-t the same to be assembled wi~h the metal retainers 2~ and 29 when the same are being press-fit together by initially disposing the inner peripheral portion ~6 of the diaphragm 45 - adjacent the surfaoe 36 of the retainer 28 after the annular seal member 30 has been disposed in the retainer 28 against the surface 31 thereof whereby the subsequent telescoping of the retainer 29 in the retainer 28 not only press-fits the inner peripheral portion 46 of the diaphragm 45 in its secured relation between the retainers 28 and 29 in the sub-assembly 27, but also the press-fitting of the retainer 29 in the retainer 28 places the annular seal member 30 under compression between the surfaces 34 and 35 thereof to cause the portion 39 of the annular seal member 30 to be forced between the part 38 of the surface 37 of the retainer 29 and the surface 36 of the retainer 28 as previously set forth to firmly secure the annular seal member 3~ therebetween.
Thus, i-t can be seen that it is a relatively simple method of this invention to form the seal sub-assembly 27 that is adapted to be utilized to form part of the seal means 26 of the valve construction 20 in a manner now to be described.
Before the valve member 23 is assembled in the valve chamber 22 of the housing means 21 to be rotatably supported therein by the conventional side seal means 73 carried in annular grooves 74 in the housing means 21 in a manner well known in the art, the annular wedge seal member 61 and the lip seal diaphragm 54 are placed on the shoulder means 62 of the valve member ~ in telescoped relation over ~L~8~
the stem 24 thereof and *hen the pre-formed self-contained sub-assernbly 27 is forced down the stem 24 into the posi-tion illustrated in ~IG. 1, the stem 24 having a unique tapered transition section 75 disposed between a large cylindrical section 76 thereof and a smaller cylindrical section 77 thereof to facilitate the press-fitting of the seal member 30 onto the stem section 76 that has a larger outer diameter than the normal inner diameter of the annular seal member 30.
In particular, upon the initial telescoping ~f the~seal sub-assembly 27 on~o the stem 24 of the valve member 23, the inner peripheral base 34 of the annular seal member 30 clears *he cylindrical surface 77, because the outer diame~er of the section 77 is smaller than the normal inside diameter of the annular seal member 30, until the seal member 30 reaches the smaller base 78 of the tapered section 75 and is g~adually outwardly radially urged by the tapering section 75 until the seal member 30 reaches the larger base 79 of the transition section 75 to permit the annular seal member 30 to slide down the cylindrical section 76 into its fiaal position as illustrated in FIG. 17 such outward radial press-fitting of the seal member 30 on the stem section 76 causing the seal member 30 to be radially compressed between the large and small bases 34 and 33 thereof to further provide good sealing engagement on the valve stem 24 and main-tain its sealing engagement with the retainers 28 and 29.
Thus~ the seal sub-assembly 27 is moved down the stem 24 of the valve member 23 until the retainer 29 has its surface 63 mate with *he end 60 of the lip seal means 54 and the metal diaphragm 45 is disposed against the seal diaphragm 54.
When the valve rnember 23 is subsequently disposed in the chamber 22, the metal diaphragm 45 engages against the ~L~87~67 annular surface 48 of ~ne housing 21 and has its peripheral end 49 disposed against the annular seal member 50.
Thereafter, the cover member 42 is disposed on ~the housing means 21 and is bolted thereto by suitable bolts 5 (no-t shown) to cause the surface 52 thereof to hold the metal diaphra~m 45 against the surface 48 of the housing means 21 and maintain the peripheral end 49 of the metal diaphragm 45 in sealing engagement with tne annular seal means S0 as illus-trated.
The adjusting screws 40 of the cover member 42 are then adjusted to provide sufficient force on the seal sub-assembly 27 to maintain the lip seal means 60 in good sealing engagement with the stem 24 of the valve member 23.
In this manner, it can be seen -that the valve stem 24 and valve member 23 is adapted to be ro-tated in unison in the housing means 21 because the seal means 26 permits such rotational movement therebetween while providing the main sealing functlon through i-ts polymeric seal diaphragm 54 that maintains sealing engagement against the stem 24 of ~0 the valve member 23 and ~he surface 58 of the housing means 21, ~he seal path provided by the annular seal member 30, metal diaphragm 45 and annular seal member 50 merely being at this time a backup sealing means to the polymeric sealing diaphrag~
54 as the polymeric diaphragm 54 is the first seal means that closes the valve chamber 22 from the exterior of the valve construction 20.
However, as previously set forth, should an adverse fire or heat situation cause the burning up and/or o*her destruction of the polymeric seal means 54 of the valve 3D construction 20, the seal provided by -the annular seal member 37~
30, metal diaphragm 45 and annular seal member 50 provides a substantially firesafe top seal arrangement so that fluid leakage from the chamber 22 to the exterior of the valve construc-tion 20 cannot take place after an adverse fire or the like which might cause the fluid being con-trolled by the valve means 20 to feed such an adverse fire condition, such as when the fluid controlled by the valve construction 20 is a petroleum product or the likeO
In any event, it can be seen that the improved seal means 26 of this invention not only provides conven~ional sealing of the valve chamber 22 from the exterior of the valve construction 20 with the polymeric seal means 54, but also the seal ~eans 26 proviàes a backup seal means thereto should the seal means 54 be destroyed in any manner, the backup seal means 30, 45 and 50 actually providing a firesafe seal means for the reasons previously set ~orth.
Therefore, it can be seen that this invention not only provides an improved valve construction, but also this invention provides an improved method of ~aking SUC}l a valve construction.
While the form and me-thod of this invention now preferred have been illustrated and described as required by the Patent Statute, it is to be understood that other forms and method steps can be utilized and still fall within the scope of the appended claims.
FIG. 4 is a schematic cross-sectional view illus-trating one of the steps of this invention for making the metal diaphragm for the seal means of the valve construction of FIG. 1.
- FIG. 5 is a view similar to FIG. 4 and illustrates another step in the method of this invention fvr making the metal diaphragm for the seal means of the valve construction of FIG. 1.
ESCRIPTION OF THE P'C?I~ 5ul~-NT
While the various features of this invention are hereinafter illustrated and described as providing a fire-safe top seal means for a particular valve construction, it is to be understood that the various features of this inven-tion can be utilized singly or in any cornbination thereo~ to provide other types o~ seal means for other types of valve constructions as desired.
Therefore, -this invention is not to be limited to only the embodiment illustrated in the drawings, because the drawings are merely utilized to illustrate one of the ~ide variety of uses of this invention.
Referring now to FIG. 1, the improved valve con-struction of this invention is generally indicated by the reference num~ral 2~ and comprises a housing means 21 having a valve chamber 22 therein that rotatably receives a valve member 23 therein in a manner well known in the art, such as in a plug valve construction or the like, the valve member 23 naving a valve stem or shank 24 extending from the valve cnamber 22 and being provided with a flattened end 25 to which 7~67 suitable hub and wrench structure (n~t shown) or the like can be attached for rotating the valve member 23 to various operating positions in the valve chamber 22 of the housing means 21 to control fluid flow therethrough in a manner well known in the art and for any desired purpose.
~he valve construction 20 includes improved seal - Means of this invention that is generally indicated by the reference numeral 26 in the drawings and is utilized for pre-venting fluid leakage from the chamber 22 to the exterior of the housing means 21 by sealing against and completely around the valve stem 24 and to the housing means 21 in a manner here-inafter set forth.
In addition, the sealing means 26 of this invention uniquely provides a substantially fire-safe top seal means for the valve construction 20 so that even if the polymeric sealing parts thereof are destroyed by fire, high temperatures or other adverse effects, the improved seal means 26 of this invention will still prevent fluid leaka~e from the valve chamber 22 to the exterior of the housing means 21 so that such fluid controlled by the valve construction 20 can not provide a hazard itself, such as feeding a fire that caused the partial destruction of the seal means 26 in the first place should such fluid be a flammable liquid such as a petro-leum product or the like.
The seal means 26 of this invention includes a self-contained seal sub-assembly -that is ~enerally indicated by the reference numeral 27 in FI~S. 2 and 3 and will now be described.
The seal sub-assembly 27 comprises a pair of annu-lar metallic retainers or thrust collar rings 28 and 29 ~8'7~
adapted to be press-fitted together in a telescoping relation in a manner hereinafter se-t forth to hold an annular seal member 3~ between tapering surfaces 31 and 32 of the respec-tive re-tainers 28 and 29, the tapering surfaces 31 and 32 tapering towards each other as the surfaces 31 and 32 extend in a direction substantially transversely away from the valve stem 24 as illustrated in FIG. 1, While the annular seal member 30 can be formed of any suitable material that will provide a seal function and be sub-stantially fireproof, one embodiment of the seal means 26 ofthis invention that has proved satisfactory has the annular seal member 30 made from a m~terial that is substantially pure graphite and that is sold under the Trademark "Grafoil tl by the Union Car-bide Corporation of 270 Park Avenue, New York, New York.
The annular seal ~nember 30 has a substantially trapezoidal cross-sectional configuration that defines opposed large and small bases 34 and 33 thereof joined to-gether by angled sides 35 which respectively are disposed in engaging sealing relation with the tapering sides 31 and 32 of the retainers 28 and 29, the large base 34 being dis-posed inboard of the retainers 28 and 29 for its sealing purpose as will be apparent hereinafter.
The outer ring or retainer 28 has an annular sur-face 36 intersecting with the tapering surface 31 thereof and being substantially concen-trically disposed relative to the stem 24 as illustrated in FI~. 1.
The inner ring or retair.er 29 also has a surface 37 tnat is adapted to face the surface 36 of the outer re~ainer 28 and intersects with the tapering surface 32 thereof 9 the sur-face 37 generally being concentrically and facing outwardly 37~7 from the stem 24 as illustrated in FIG. 1 but having an angledportion 38 thereof adjacent the surface 32 -thereof for permitting a portion 39 of the annular seal member 30 to be forced between the portion 38 of the surface 37 of retainer 29 and the facing surface 36 of the retainer 28 as illustrated in FIG. 1 when the seal member 30 is compressed between the retainers 28 and 29 not only during the assembling of the retainer 29 within the retainer 28 in a manner hereinafter set forth, but also when the seal sub-assembly 27 is forced onto the stem 24 into the position illustra*ed in FIG. 1.
The seal sub-assembly 27 is adjusted in the valve construction by adjusting screws 40 threadedly carried in threaded bores 41 in a cover member 42 of the housing means 21 which are subsequently turned in a *ightening direction to cause the ends 43 of the adjusting screws 40 to bear down-wardly on the upper surface 44 of the retainer 28 to tend to move the seal sub-assembly 27 downwardly in FIG. 1 for a purpose hereinaf-ter described.
The seal sub-assembly 27 includes a metallic dia-phragm 45 having an inner peripheral portion 46 disposed inpress-fit relation between the facing surfaces 36 and 37 of the press-fit retainers 28 and 29 while the outer peripheral portion 47 thereof is adapted to e~tend generally trans-versely away from the valve stem 24 to not only engage against an annular surface 48 of the housing means 21, but also to nave itSouter peripheral end 49 bearing against an annular sealing member 50 disposed in an annular groove 51 formed in the housing means 21 immediately adjacent and outboard of the surface 48 as illustrated in FIG. 1.
3D While the annular seal member 50 can be any suitable 7fl,~6'7 material which will provide a sealing function and be substantially fire-proof, in one embod~ment of the seal means 26 of this invention, the annular seal means 50 is formed of the same material as the annular seal member 30 previously described.
Also, while the metal diaphragm 45 can be formed of any suitable meterial and of any suitable thickness in order to be substantially fire proof, it has been found that the same can comprise stainless steel and be shaped into the configuration illustrated in FIG. 1 in a manner hereinafter set forth.
The outer peripheral portion 47 of the metal diaphragm 45 is held against the annular surface 48 of the housing means 21, as well as against the annular seal member 50, by a cooperating surface 52 on the cover member 42 which has an annular beveled edge ~3 which mates with the pre-bent and angled peripheral end 49 of the metal diaphragm 45 as illus~
trated in FIG. 1 to mate with the annular surface 48 and the annular seal member 50 when the cover member 42 is bolted by ~uitable bolts ~not shown) against the housing means 21 as illust-rated in FIG. 1 to permit the threaded adjusting means 40 to adjust its compressive force on the seal means 26 for the sealing purpose previously described.
The sealing means 26 includes a formed sealing diaphragm 54 having an outer peripheral portion 55 provided with an annular bead 5Ç received in an annular groove 57 formed in the housing means 21 outboard of an annular surface 58 thereof which is received in an annular groove 59 formed in tne outer peripheral portion 55 of the diaphragm 54 as illustra~d in FI~. 1, the annular groove 57 in ~he housing ;7 means 21 having sufficient clearance to permit radial outward expansion of the diaphragm 54 when under compression by the cover member 42 as will be apparent hereinafter whereby the groove 51 comprises an expansion groove for the 5 diaphragm 54.
The diaphragm 54 has i-ts inner peripheral portion 60 shaped to be disposed over an annular wedge shaped sealing ring 61 disposed on an annular shoulder 62 of valve member 23 so that the inner peripheral portion 60 of the diaphragm 54 10 forms a lip seal that is disposed in sealing engagement with the valve stem 24 as illustrated, the retainer 29 of the seal sub-assembly 27 having an internal substantially L-shaped annular surface 63 that cooperates with the inner peripheral portion 60 of the seal diaphragm 54 to hold the same against 15 the annular wedge seal 61 and urge the same into sealing engagement with the sralve st~ 24 as illustrated.
While the flexible seal diaphragm 54 and the wedge seal member 61 can be formed of any suitable polymeric material to perforIn a sealing function to fluid seal the chamber 22 of 20 the housing means 21 to the exterior of the valve construction 20 between the surface 58 of the housing means 21 and the valve stem 24, it has been found that tne same can be formed of a plastic material sold under the Trademark "PT~E Teflon" and made by the E. I. DuPont de Nemours Company of 1007 ~arket 25 Street, Wilmington, Delaware. If desired~ such plastic material for the wedge ring or seal 61 can be glass filled.
~ nile the metal diaphragm 45 of this inven-tion can be formed in any suitable manner into the configuration illustrated in EIGS. 1-3, one method of t}is invention for 30 shaping the diaphragm 45 is illust-rated in ~IGS. 4 and 5 _9_ i57 and will now be described.
As illustrated in ~IG. 4~ the metal diaphragm 45 has a central opening 64 formed therethrough so the same is adapted to be disposed over a cylindrical shank 65 of a male die member 66 having a frusto-conical section 67 joined to an outwardly directed flat annular portion 68 -that shapes the metal diaphragm 45 into the configuration illustrated in FIG, 4 when a female die member 69 has its cooperating surface means that comprises an angled surface means 70 and annular flat surface means 71 respectively cooperating with the surfaces 67 and 68 of the male die member 66 when mated therewith as illustrated in ~IG. 4.
Subsequently, when the male die member 66 is removed from the female die member 69, the outer peripheral end 49 of tne metal diaphragm 45 can be formed against an angled surface 72 of the female die member 69 in any suitable manner, such as by tapping the same against the angled surface 72 with a suitable tool completely around the entire periphery of the diaphragm 45 in order to provide the pre-bent end 49 for the sealing purpose with the annular seal member 50 as previously described.
Thus it can be seen that even though the inner peripheral portion 46 of the preformed diaphragm 45 is initially angled at less than 90 with the outer peripheral portion 47 thereof when the diaphragm 45 is removed from the die members 66 and 69, the inner peripheral portion 46 of the diaphragm 45 is subsequently bent approximately 90 relative to the outer peripheral portion 47 thereof during the assembly of the inner peripneral portion 46 or the diaphragm 45 with the retainers 28 and 29 in their subsequent press-fit relation as illustrated --10 _ in FIGS. 1 and 2.
Therefore, it can be seen that it is a relatively simple method of this invention to form the metal diaphragm 45 to permi-t the same to be assembled wi~h the metal retainers 2~ and 29 when the same are being press-fit together by initially disposing the inner peripheral portion ~6 of the diaphragm 45 - adjacent the surfaoe 36 of the retainer 28 after the annular seal member 30 has been disposed in the retainer 28 against the surface 31 thereof whereby the subsequent telescoping of the retainer 29 in the retainer 28 not only press-fits the inner peripheral portion 46 of the diaphragm 45 in its secured relation between the retainers 28 and 29 in the sub-assembly 27, but also the press-fitting of the retainer 29 in the retainer 28 places the annular seal member 30 under compression between the surfaces 34 and 35 thereof to cause the portion 39 of the annular seal member 30 to be forced between the part 38 of the surface 37 of the retainer 29 and the surface 36 of the retainer 28 as previously set forth to firmly secure the annular seal member 3~ therebetween.
Thus, i-t can be seen that it is a relatively simple method of this invention to form the seal sub-assembly 27 that is adapted to be utilized to form part of the seal means 26 of the valve construction 20 in a manner now to be described.
Before the valve member 23 is assembled in the valve chamber 22 of the housing means 21 to be rotatably supported therein by the conventional side seal means 73 carried in annular grooves 74 in the housing means 21 in a manner well known in the art, the annular wedge seal member 61 and the lip seal diaphragm 54 are placed on the shoulder means 62 of the valve member ~ in telescoped relation over ~L~8~
the stem 24 thereof and *hen the pre-formed self-contained sub-assernbly 27 is forced down the stem 24 into the posi-tion illustrated in ~IG. 1, the stem 24 having a unique tapered transition section 75 disposed between a large cylindrical section 76 thereof and a smaller cylindrical section 77 thereof to facilitate the press-fitting of the seal member 30 onto the stem section 76 that has a larger outer diameter than the normal inner diameter of the annular seal member 30.
In particular, upon the initial telescoping ~f the~seal sub-assembly 27 on~o the stem 24 of the valve member 23, the inner peripheral base 34 of the annular seal member 30 clears *he cylindrical surface 77, because the outer diame~er of the section 77 is smaller than the normal inside diameter of the annular seal member 30, until the seal member 30 reaches the smaller base 78 of the tapered section 75 and is g~adually outwardly radially urged by the tapering section 75 until the seal member 30 reaches the larger base 79 of the transition section 75 to permit the annular seal member 30 to slide down the cylindrical section 76 into its fiaal position as illustrated in FIG. 17 such outward radial press-fitting of the seal member 30 on the stem section 76 causing the seal member 30 to be radially compressed between the large and small bases 34 and 33 thereof to further provide good sealing engagement on the valve stem 24 and main-tain its sealing engagement with the retainers 28 and 29.
Thus~ the seal sub-assembly 27 is moved down the stem 24 of the valve member 23 until the retainer 29 has its surface 63 mate with *he end 60 of the lip seal means 54 and the metal diaphragm 45 is disposed against the seal diaphragm 54.
When the valve rnember 23 is subsequently disposed in the chamber 22, the metal diaphragm 45 engages against the ~L~87~67 annular surface 48 of ~ne housing 21 and has its peripheral end 49 disposed against the annular seal member 50.
Thereafter, the cover member 42 is disposed on ~the housing means 21 and is bolted thereto by suitable bolts 5 (no-t shown) to cause the surface 52 thereof to hold the metal diaphra~m 45 against the surface 48 of the housing means 21 and maintain the peripheral end 49 of the metal diaphragm 45 in sealing engagement with tne annular seal means S0 as illus-trated.
The adjusting screws 40 of the cover member 42 are then adjusted to provide sufficient force on the seal sub-assembly 27 to maintain the lip seal means 60 in good sealing engagement with the stem 24 of the valve member 23.
In this manner, it can be seen -that the valve stem 24 and valve member 23 is adapted to be ro-tated in unison in the housing means 21 because the seal means 26 permits such rotational movement therebetween while providing the main sealing functlon through i-ts polymeric seal diaphragm 54 that maintains sealing engagement against the stem 24 of ~0 the valve member 23 and ~he surface 58 of the housing means 21, ~he seal path provided by the annular seal member 30, metal diaphragm 45 and annular seal member 50 merely being at this time a backup sealing means to the polymeric sealing diaphrag~
54 as the polymeric diaphragm 54 is the first seal means that closes the valve chamber 22 from the exterior of the valve construction 20.
However, as previously set forth, should an adverse fire or heat situation cause the burning up and/or o*her destruction of the polymeric seal means 54 of the valve 3D construction 20, the seal provided by -the annular seal member 37~
30, metal diaphragm 45 and annular seal member 50 provides a substantially firesafe top seal arrangement so that fluid leakage from the chamber 22 to the exterior of the valve construc-tion 20 cannot take place after an adverse fire or the like which might cause the fluid being con-trolled by the valve means 20 to feed such an adverse fire condition, such as when the fluid controlled by the valve construction 20 is a petroleum product or the likeO
In any event, it can be seen that the improved seal means 26 of this invention not only provides conven~ional sealing of the valve chamber 22 from the exterior of the valve construction 20 with the polymeric seal means 54, but also the seal ~eans 26 proviàes a backup seal means thereto should the seal means 54 be destroyed in any manner, the backup seal means 30, 45 and 50 actually providing a firesafe seal means for the reasons previously set ~orth.
Therefore, it can be seen that this invention not only provides an improved valve construction, but also this invention provides an improved method of ~aking SUC}l a valve construction.
While the form and me-thod of this invention now preferred have been illustrated and described as required by the Patent Statute, it is to be understood that other forms and method steps can be utilized and still fall within the scope of the appended claims.
Claims (25)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a valve construction comprising a housing means having a valve chamber therein, a valve means rotatably carried by said housing means in said chamber thereof and having a valve stem extending from said chamber, and seal means carried by said housing means to prevent leakage from said chamber to the exterior of said housing means and having an annular seal member sealing against and completely around said stem while permitting rotational movement therebetween, the improvement wherein said seal means comprises a pair of annular metallic retainers press-fitted together in telescoping relation and holding said annular seal member therebetween in compressed sealed relation therewith, said retainers having annular facing surfaces compressing said seal member therebetween, and said facing surfaces being disposed to generally taper toward each other in a direction substantially transverse to and away from said stem.
2. A valve construction as set forth in claim 1 wherein said seal member has a generally trapezoidal cross-sectional con-figuration defining a large base interconnected to a small base by angled sides with said larger base thereof engaging said stem and said angled sides thereof engaging said facing surfaces of said retainers.
3. A valve construction as set forth in claim 2 wherein one of said retainers has another annular surface that is substantially concentric with and faces toward said stem, said small base of said seal member engaging said other annular surface.
4. A valve construction as set forth in claim 3 wherein said seal member is also under compression between said bases thereof.
5. A valve construction as set forth in claim 3 wherein said other annular surface of said one retainer intersects said tapering surface thereof, the other of said retainers having another annular surface thereof facing said other surface of said one retainer and intersecting with its respective tapering surface.
6. A valve construction as set forth in claim 5 wherein part of said seal member adjacent said small base thereof is compressed and held between said facing other surfaces of said retainers.
7. A valve construction as set forth in claim 5 wherein said seal means comprises a metal diaphragm having an inner annular peripheral portion and an outer annular peripheral portion, said inner annular peripheral portion of said metal diaphragm being held in press-fit relation between said other facing surfaces of said retainers and said outer annular peripheral portion thereof extending generally transversely away from said stem.
8. A valve construction as set forth in claim 7 wherein said housing means has an annular seal surface generally concentric to said stem and spaced outwardly therefrom, said seal means comprising another annular seal member carried by said annular seal surface, said outer annular peripheral portion of said metal diaphragm sealing engaging said other annular seal member.
9. A valve construction as set forth in claim 8 wherein said housing means comprises a cover member having an annular surface that engages said outer annular peripheral portion of said metal diaphragm and holds the same in annular sealing engagement with said other annular seal member.
10. A valve construction as set forth in claim 9 wherein said seal means comprises a sealing diaphragm having an inner annular peripheral portion disposed in sealing relation against and completely around said stem intermediate said chamber and said annular seal member that engages said stem and an outer annular peripheral portion sealing engaging said housing means generally concentrically about said stem in spaced relation therefrom and inboard of said other annular seal member.
11. A valve construction as set forth in claim 9 wherein said seal means comprises a metal diaphragm having an inner annular peripheral portion and an outer annular peripheral portion, said inner annular peripheral portion of said metal diaphragm being held in press-fit relation between said retainers and said outer annular peripheral portion thereof extending generally transversely away from said stem.
12. A valve construction as set forth in claim 11 wherein said housing means has an annular seal surface generally concentric to said stem and spaced outwardly therefrom, said seal means comprising another annular seal member carried by said annular seal surface, said outer annular peripheral portion of said metal diaphragm sealing engaging said other annular seal member.
13. A valve construction as set forth in claim 1 wherein said stem has means placing said annular seal member under radial compression.
14. A valve construction as set forth in claim 13 wherein said means of said stem comprises a section of said stem that has an outside diameter larger than the normal inside diameter of said annular seal member.
15. A valve construction as set forth in claim 14 wherein said section of said stem comprises a cylindrical section of said stem.
16. A valve construction as set forth in claim 15 wherein said stem has another cylindrical section disposed outboard of the first-named cylindrical section, said other section having an outside diameter smaller than the normal inside diameter of said annular seal member.
17. A valve construction as set forth in claim 16 wherein said stem has a frustoconical transition section intermediate and interconnecting said cylindrical sections together.
18. In a seal means for a valve construction wherein said valve construction comprises a housing means having a valve chamber therein and a valve means rotatably carried by said housing means in said chamber thereof and having a valve stem extending from said chamber, said seal means being adapted to be carried by said housing means to prevent leakage from said chamber to the exterior of said housing means and having an annular seal member adapted to seal against and completely around said stem while permitting rotational movement therebetween, the improve ment wherein said seal means comprises a pair of annular metallic retainers press-fitted together in telescoping relation and holding said annular seal member therebetween in compressed sealed relation therewith, said retainers having annular facing surfaces compressing said seal member therebetween, and said facing surfaces being disposed to generally taper toward each other in a direction substantially transverse to and away from said stem once said seal means is in its installed position in said valve construction, said press-fitted retainers with said compressed seal member therebetween defining said seal means as a self-contained unitary structure.
19. A seal means as set forth in claim 18 and further com-prising a metal diaphragm having an inner annular peripheral portion and an outer annular peripheral portion, said inner annular peripheral portion of said metal diaphragm being held in press-fit relation between said retainers and said outer annular peripheral portion thereof extending radially outwardly from said retainers, said metal diaphragm comprising said unitary structure.
20. A seal means as set forth in claim 18 wherein said seal member has a generally trapezoidal cross-sectional configuration defining a large base interconnected to a small base by angled sides with said large base thereof being adapted to engage said stem and said angled sides thereof engaging said facing surfaces of said retainers.
21. A seal means as set forth in claim 20 wherein one of said retainers has another annular surface that is substantially con-centric with and faces toward said stem with seal means in said installed position, said small base of said seal member engaging said other annular surface, and said seal member being adapted to be under compression between said bases thereof once said seal means is in its installed position.
22. A seal means as set forth in claim 21 wherein said other annular surface of said one retainer intersects said tapering surface thereof, the other of said retainers having another annular surface thereof facing said other surface of said one retainer and intersecting with its respective tapering surface.
23. A seal means as set forth in claim 22 wherein part of said seal member adjacent said small base thereof is compressed and held between said facing other surfaces of said retainers.
24. A seal means as set forth in claim 22 and further com-prising a metal diaphragm having an inner annular peripheral portion and an outer annular peripheral portion, said inner annular peripheral portion of said metal diaphragm being held in press-fit relation between said other facing surfaces of said retainers and said outer annular peripheral portion thereof ex-tending radially outwardly from said retainers, said metal diaphragm comprising said unitary structure.
25. In a valve construction comprising a housing means having a valve chamber therein a valve means rotatably carried by said housing means in said chamber thereof and having a valve stem extending from said chamber, and seal means carried by said housing means to prevent leakage from said chamber to the exterior of said housing means and having an annular seal member sealing against and completely around said stem while permitting rotational movement therebetween, the improvement wherein said seal means comprises a pair of annular metallic retainers press-fitted together in telescoping relation and holding said annular seal member therebetween in compressed sealed relation therewith, said retainers having annular facing surfaces compressing said seal member therebetween, said facing surfaces being disposed to generally taper toward each other in a direction substantially transverse to and away from said stem, said seal member having a generally trapezoidal cross-sectional configuration defining a large base interconnected to a small base by angled sides with said larger base thereof engaging said stem and said angled sides thereof engaging said facing surfaces of said retainers, one of said retainers having another annular surface that is substantially concentric with and faces toward said stem, said small base of said seal member engaging said other annular surface, said other annular surface of said one retainer intersecting said tapering surface thereof with the other of said retainers having another annular surface thereof facing said other surface of said one retainer and intersecting with its respective tapering surface, said seal means comprising a metal diaphragm having an inner annular peripheral portion and an outer annular peripheral portion, said inner annular peripheral portion of said metal diaphragm being held in press-fit relation between said other facing surfaces of said retainers and said outer annular peripheral portion thereof extending generally transversely away from said stem, said housing means having an annular seal surface generally concen-tric to said stem and spaced outwardly therefrom, said seal means comprising another annular seal member carried by said annular seal surface, said outer annular peripheral portion of said metal diaphragm sealingly engaging said other annular seal member, said housing means comprising a cover member having an annular surface that engages said outer annular peripheral portion of said metal diaphragm and holds the same in annular sealing engagement with said other annular seal member, and said seal means further comprising a sealing diaphragm having an inner annular peripheral portion disposed in sealing relation against and completely around said stem intermediate said chamber and said annular seal member that engages said stem and an outer annular peripheral portion sealingly engaging said housing means generally concentrically about said stem in spaced relation therefrom and inboard of said other annular seal member, said sealing diaphragm having said inner peripheral portion thereof defining an annular lip seal against said stem.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US357,974 | 1982-03-15 | ||
| US06/357,974 US4462568A (en) | 1982-03-15 | 1982-03-15 | Valve construction and method of making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1187467A true CA1187467A (en) | 1985-05-21 |
Family
ID=23407797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000423500A Expired CA1187467A (en) | 1982-03-15 | 1983-03-14 | Valve construction and method of making the same |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4462568A (en) |
| EP (1) | EP0089305B1 (en) |
| JP (1) | JPS58170987A (en) |
| KR (1) | KR840004235A (en) |
| AT (1) | ATE21752T1 (en) |
| BR (1) | BR8301208A (en) |
| CA (1) | CA1187467A (en) |
| DE (1) | DE3365535D1 (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3246058A1 (en) * | 1982-12-13 | 1984-06-14 | Deutsche Babcock Werke AG, 4200 Oberhausen | VALVE WITH REAR SEAL |
| US4684106A (en) * | 1983-04-05 | 1987-08-04 | Nupro Company | Valve |
| US4535803A (en) * | 1984-03-19 | 1985-08-20 | The Dow Chemical Company | Plug valve |
| DE3635058A1 (en) * | 1986-10-15 | 1988-05-11 | Audco Gmbh | SEALING ARRANGEMENT FOR THE ACTUATING PIN OF A STOP VALVE |
| FR2658893B1 (en) * | 1990-02-23 | 1994-02-11 | Supranite Ste Indle Equip Meca | PROCESS FOR PRODUCING A SEALING RING AND PRODUCT OBTAINED ACCORDING TO THE PROCESS. |
| DE4226566C2 (en) * | 1992-08-12 | 1996-04-18 | Jagenberg Ag | Device for dosing and filling liquid or pasty products |
| US5402983A (en) * | 1993-08-30 | 1995-04-04 | Xomox Corporation | Combined metal and plastic diaphragm assembly for a valve |
| US5681028A (en) * | 1995-10-23 | 1997-10-28 | Emhart Inc. | Valve assembly |
| US5860633A (en) * | 1996-10-28 | 1999-01-19 | Murphy; Ryan E. | Valve seal |
| DE19646040A1 (en) * | 1996-11-08 | 1998-05-20 | Pfannenschmidt Erhard | Control valve |
| EP0937925A1 (en) * | 1998-02-19 | 1999-08-25 | James Wang | Sealing gasket module for a valve |
| DE29903320U1 (en) | 1999-02-25 | 1999-07-15 | Xomox Int Gmbh | Fitting |
| DE20005320U1 (en) * | 2000-03-22 | 2001-05-10 | Claret Jose | Fireproof packing for sealing a valve stem |
| GB2394016B (en) * | 2001-08-03 | 2005-04-06 | Aes Eng Ltd | Mechanical and non-mechanical seals without elastomers |
| EP1678432B1 (en) * | 2003-10-31 | 2013-08-07 | Fluoroseal Inc | Adjustable sealing means |
| CA2447866A1 (en) * | 2003-10-31 | 2005-04-30 | Fluoro-Seal Inc. | Plug valve adjustment means |
| US7540303B2 (en) | 2003-10-31 | 2009-06-02 | Fluoroseal Inc. | Adjustable sealing means |
| DE102005009295A1 (en) * | 2004-07-13 | 2006-02-16 | Ing. Erich Pfeiffer Gmbh | Dosing device for media |
| FR2922984B1 (en) | 2007-10-31 | 2013-09-27 | Saint Gobain Performance Plast | VALVE HAVING RIGID SEAL |
| FR2922988B1 (en) | 2007-10-31 | 2012-10-12 | Saint Gobain Performance Plast | PIPE ASSEMBLIES |
| US8348236B2 (en) * | 2007-10-31 | 2013-01-08 | Saint-Gobain Performance Plastics Corporation | Butterfly valve with a rigid seal |
| DE102008032716B4 (en) * | 2008-07-11 | 2011-03-31 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Valve with a high average operating time |
| JP5316302B2 (en) * | 2008-08-13 | 2013-10-16 | 三菱マテリアル株式会社 | Chlorosilane liquid storage container and closure lid for the storage container |
| MY161808A (en) | 2010-07-30 | 2017-05-15 | Swagelok Co | Anti-extrusion packing support |
| US9512934B2 (en) * | 2013-06-18 | 2016-12-06 | Fisher Controls International Llc | Seal assemblies for use with fluid valves |
| JP2016102517A (en) * | 2014-11-27 | 2016-06-02 | ワールドバルブ株式会社 | Fire Safety valve |
| FR3051180B1 (en) * | 2016-05-13 | 2019-07-26 | Aptar France Sas | RING FOR DEVICE FOR DISPENSING FLUID. |
| US10309562B2 (en) | 2017-07-18 | 2019-06-04 | Freudenberg Oil & Gas, Llc | Metal to metal wedge ring seal |
| WO2019224605A1 (en) * | 2018-05-22 | 2019-11-28 | Compart Systems Pte. Ltd. | Variable control orifice valve |
| KR102591730B1 (en) * | 2021-12-13 | 2023-10-23 | 주식회사 쓰리젯 | Stem sealing assembly and plug valve with the same |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2032316A (en) * | 1934-04-28 | 1936-02-25 | Walworth Patents Inc | Valve |
| FR1398703A (en) * | 1958-09-12 | 1965-05-14 | Pechiney Prod Chimiques Sa | Faucets |
| FR1344415A (en) * | 1962-10-16 | 1963-11-29 | Sealing device especially for valve control rod | |
| US3294408A (en) * | 1963-04-22 | 1966-12-27 | Continental Mfg Company | Auxiliary, external, pressure seal for shank of plug valve |
| US3235272A (en) * | 1963-04-22 | 1966-02-15 | Continental Mfg Company | Auxiliary, external, pressure seal for shank of plug valve |
| US3477730A (en) * | 1965-03-26 | 1969-11-11 | Chicago Rawhide Mfg Co | Shaft seal |
| US3351350A (en) * | 1966-06-22 | 1967-11-07 | Koppers Co Inc | High pressure rod seal |
| US3521856A (en) * | 1967-09-25 | 1970-07-28 | Xomox Corp | Lined plug valve with means for sealing against leakage |
| US3685793A (en) * | 1969-01-24 | 1972-08-22 | Uzina Mechanica De Gas Metan M | Plug-type valve with lost-motion actuator |
| SE403647B (en) * | 1977-01-19 | 1978-08-28 | Flygt Ab | DEVICE FOR LOADING A PLANT SEAL ROTARY RING |
| JPS587178Y2 (en) * | 1977-10-20 | 1983-02-08 | 株式会社クボタ | Valve structure |
| US4169604A (en) * | 1978-04-19 | 1979-10-02 | Heathcott Joe W | Rod seal |
| US4333632A (en) * | 1981-01-07 | 1982-06-08 | Xomox Corporation | Lip seal |
-
1982
- 1982-03-15 US US06/357,974 patent/US4462568A/en not_active Expired - Lifetime
-
1983
- 1983-03-04 AT AT83630039T patent/ATE21752T1/en not_active IP Right Cessation
- 1983-03-04 EP EP83630039A patent/EP0089305B1/en not_active Expired
- 1983-03-04 DE DE8383630039T patent/DE3365535D1/en not_active Expired
- 1983-03-10 BR BR8301208A patent/BR8301208A/en not_active IP Right Cessation
- 1983-03-14 CA CA000423500A patent/CA1187467A/en not_active Expired
- 1983-03-15 JP JP58043032A patent/JPS58170987A/en active Granted
- 1983-03-15 KR KR1019830001029A patent/KR840004235A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0432273B2 (en) | 1992-05-28 |
| EP0089305A1 (en) | 1983-09-21 |
| EP0089305B1 (en) | 1986-08-27 |
| JPS58170987A (en) | 1983-10-07 |
| ATE21752T1 (en) | 1986-09-15 |
| DE3365535D1 (en) | 1986-10-02 |
| KR840004235A (en) | 1984-10-10 |
| US4462568A (en) | 1984-07-31 |
| BR8301208A (en) | 1983-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1187467A (en) | Valve construction and method of making the same | |
| CN1238653C (en) | Coupling adapter and connector assembly | |
| US2761707A (en) | Tube coupling with impressionable metallic seal | |
| CA1236141A (en) | Pipe joint glands | |
| US6352267B1 (en) | Adjustaby sizeable ring seal | |
| US5683119A (en) | Pipe joint and seal therefor | |
| US5031923A (en) | Valve stem seal | |
| US4540204A (en) | Restrained pipe joint | |
| US4245661A (en) | Heat responsive back seat arrangement for valve operator | |
| JPH0362955B2 (en) | ||
| US5505466A (en) | Cylinder head gasket with retaining ring and spring seal | |
| CA2050101A1 (en) | Valve stem sealing means for prevention of fugitive emissions | |
| CA1185286A (en) | Pipe compression seal | |
| US4950002A (en) | Screw seal | |
| EP0766793B1 (en) | Bearing assembly with trapped ptfe bearing liner | |
| EP0836693A1 (en) | Flare-tube assembly | |
| CA2171653A1 (en) | Embedded in concrete, elastomeric seal for pipes | |
| US4288896A (en) | Method for manufacturing an improved plug valve | |
| CA2536500A1 (en) | Energized restraining gasket for mechanical joints of pipes | |
| US4175578A (en) | Fire resistant seat for butterfly and ball valves | |
| US6877779B2 (en) | Conduit connector and method | |
| JPH0319434B2 (en) | ||
| JP2004506828A (en) | Connection between the shaft end of the gas exchange valve of the internal combustion engine and the adjusting member of the valve regulator | |
| KR100309114B1 (en) | A glove valve | |
| JPS62266272A (en) | Stem-nose seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |