CA1080196A - Semi-lug wafer type butterfly valve - Google Patents
Semi-lug wafer type butterfly valveInfo
- Publication number
- CA1080196A CA1080196A CA318,397A CA318397A CA1080196A CA 1080196 A CA1080196 A CA 1080196A CA 318397 A CA318397 A CA 318397A CA 1080196 A CA1080196 A CA 1080196A
- Authority
- CA
- Canada
- Prior art keywords
- valve body
- flange
- valve
- flanges
- holes
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0218—Butterfly valves
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
- F16K1/2265—Shaping or arrangements of the sealing the sealing being arranged on the valve seat with a channel- or U-shaped seal covering a central body portion
Abstract
ABSTRACT OF THE DISCLOSURE
A wafer type butterfly valve is disclosed for locating between two conduit flanges. The valve has a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange. A plurality of gaps are also supplied in the valve body located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body. Thus the valve withstands pressure when attached to either flange but does not take bending forces between the flanges.
Bending forces are transferred directly from flange to flange.
A wafer type butterfly valve is disclosed for locating between two conduit flanges. The valve has a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange. A plurality of gaps are also supplied in the valve body located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body. Thus the valve withstands pressure when attached to either flange but does not take bending forces between the flanges.
Bending forces are transferred directly from flange to flange.
Description
1~80196 This invention relates to a wafer type butterfly valve~ More particularly, the invention relates to a wafer type butterfly valve for mounting between two conduit flanges~
Butterfly valves, particularly thin, wafer type butterfly valves are well known. The valves are normally mounted between the flanges of aligned, adjacent conduits or pipes in fluid systems~ In one mounting method, long flange bolts are employed joining the adjacent flanges of adjacent --conduits together with the valve sandwiched tightly between the ~langes. In this method, the bolts do not connect to the body of the valve. This method has the advantage of allowing the valve body to be made out of material that can withstand compression but need not withstand bending or tension. A
valve body sandwiched between flanges is not placed under any tension or bending forces by the connecting bolts. Thus the valve body may be made from an inexpensive material such as cast iron. A disadvantage in using long flange bolts for joining the two flanges together is that the system cannot ;
be closed by the valve when replacing conduit at the valve location because the valve is not joined to either flange of the conduits. Also, the valve must always be handled and re-positioned when replacing one or both conduits.
Another mounting method for thin wafer type valves -employs short lug bolts. One set of lug bolts connects a flange of one conduit directly to the valve body on one side and another set of lug bolts connects the flange of another conduit directly to the valve body on its other side. The valve body can be provided with threaded holes for receiving lug bolts from both flangesO When using this mounting method, the conduit on either side of the valve can be replaced without disturbing the valve and either conduit can be closed by the valve held to the flange by the lug bolts. One disadvantage - 1 - ~ :
1~0196 of fastening the flanges directly to the valve body however is any tension or bending forces between the conduits are now transmitted directly through the valve body because of the direct connection of the flanges to the valve body by the lug bolts. Therefore, the valve body must be made of a material such as steel which withstands tension and bending forces Steel valve bodies are however more expensive than cast iron valve bodies.
It is a purpose of the present invention to provide a wafer type butterfly valve that is constructed to be mounted between flanges of adjacent conduits so the fluid system can be used under high pressure operating conditions. It is another purpose to provide a wafer type butterfly valve that can be mounted between flanges of adjacent conduits and pressure may be maintained in either conduit while the other conduit is disconnected from the valve. Thus a conduit may be replaced without having to shutdown the complete fluid system, It is a further purpose of the present invention to provide a wafer type butterfly valve that can be located between flanges of adjacent conduits and can withstand pressure between either ; conduit and the valve but allows some of the bending stresses to be passed from flange to flange omitting the valve body.
In accordance with the present invention there is provided a butterfly valve constructed so it can be mounted between standard pipe flanges with both flange bolts and lug bolts. The flange bolts are employed to provide a tight seal and to carry tension and/or bending forces between the pipe flanges omitting the valve body thereby permitting the valve -body to be made from a cheaper material such as cast iron.
The lug bolts are employed to permit either pipe flange to be changed without disturbing the position or operation of the valve and with pressure remaining on the other side of the
Butterfly valves, particularly thin, wafer type butterfly valves are well known. The valves are normally mounted between the flanges of aligned, adjacent conduits or pipes in fluid systems~ In one mounting method, long flange bolts are employed joining the adjacent flanges of adjacent --conduits together with the valve sandwiched tightly between the ~langes. In this method, the bolts do not connect to the body of the valve. This method has the advantage of allowing the valve body to be made out of material that can withstand compression but need not withstand bending or tension. A
valve body sandwiched between flanges is not placed under any tension or bending forces by the connecting bolts. Thus the valve body may be made from an inexpensive material such as cast iron. A disadvantage in using long flange bolts for joining the two flanges together is that the system cannot ;
be closed by the valve when replacing conduit at the valve location because the valve is not joined to either flange of the conduits. Also, the valve must always be handled and re-positioned when replacing one or both conduits.
Another mounting method for thin wafer type valves -employs short lug bolts. One set of lug bolts connects a flange of one conduit directly to the valve body on one side and another set of lug bolts connects the flange of another conduit directly to the valve body on its other side. The valve body can be provided with threaded holes for receiving lug bolts from both flangesO When using this mounting method, the conduit on either side of the valve can be replaced without disturbing the valve and either conduit can be closed by the valve held to the flange by the lug bolts. One disadvantage - 1 - ~ :
1~0196 of fastening the flanges directly to the valve body however is any tension or bending forces between the conduits are now transmitted directly through the valve body because of the direct connection of the flanges to the valve body by the lug bolts. Therefore, the valve body must be made of a material such as steel which withstands tension and bending forces Steel valve bodies are however more expensive than cast iron valve bodies.
It is a purpose of the present invention to provide a wafer type butterfly valve that is constructed to be mounted between flanges of adjacent conduits so the fluid system can be used under high pressure operating conditions. It is another purpose to provide a wafer type butterfly valve that can be mounted between flanges of adjacent conduits and pressure may be maintained in either conduit while the other conduit is disconnected from the valve. Thus a conduit may be replaced without having to shutdown the complete fluid system, It is a further purpose of the present invention to provide a wafer type butterfly valve that can be located between flanges of adjacent conduits and can withstand pressure between either ; conduit and the valve but allows some of the bending stresses to be passed from flange to flange omitting the valve body.
In accordance with the present invention there is provided a butterfly valve constructed so it can be mounted between standard pipe flanges with both flange bolts and lug bolts. The flange bolts are employed to provide a tight seal and to carry tension and/or bending forces between the pipe flanges omitting the valve body thereby permitting the valve -body to be made from a cheaper material such as cast iron.
The lug bolts are employed to permit either pipe flange to be changed without disturbing the position or operation of the valve and with pressure remaining on the other side of the
- 2 -108~196 valve. Thus, if a pipe flange is to be replaced, the flange bolts between the two flanges are removed and the lug bolts joining the flange to the valve are also removedO The valve is, however, still fastened by lug bolts to the other flange while a new flange is being replaced.
The present invention provides in a wafer type valve for locating between two conduit flanges, including a thin valve body with flat parallel mounting surfaces, a central bore ex-tending between the mounting surfaces and closing means within the central bore, the improvement comprising a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange, and a plurality of gaps in the valve body, the gaps located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
In other embodiments the mounting holes are equally spaced apart around the circle, and the gaps comprise portions removed from a peripheral edge of the valve body between the mounting surfaces. The valve body may have a generally square shape with a mounting hole in each corner, and is preferably made of cast iron.
The present invention also provides a fluid system including a wafer type butterfly valve with a conduit on each side, each conduit having a flange with a plurality of holes evenly spaced apart around a circle, the conduits being in line and the holes in the flanges being in line, the valve com-prising a thin valve body with flat parallel mounting surfaces for positioning against the flanges, a central bore extending I ~08~96 between the mounting surfaces, closing means within the central - bore, a plurality of threaded mounting holes extending between the mounting surfaces in line with alternate holes in the flanges, a plurality of gaps in the valve body, the gaps in line with the remaining holes in the flanges, a plurality of lug bolts holding each flange to the threaded mounting holes within the valve body to withstand conduit pressure between the valve body and each flange, and a plurality of long bolts extending through the remaining holes in the flanges, connecting the flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
In drawings which illustrate embodiments of the invention, Figure 1 is an elevational side view of a butterfly valve mounted between two flanges.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Figure 3 is a cross-sectional view taken along line
The present invention provides in a wafer type valve for locating between two conduit flanges, including a thin valve body with flat parallel mounting surfaces, a central bore ex-tending between the mounting surfaces and closing means within the central bore, the improvement comprising a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange, and a plurality of gaps in the valve body, the gaps located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
In other embodiments the mounting holes are equally spaced apart around the circle, and the gaps comprise portions removed from a peripheral edge of the valve body between the mounting surfaces. The valve body may have a generally square shape with a mounting hole in each corner, and is preferably made of cast iron.
The present invention also provides a fluid system including a wafer type butterfly valve with a conduit on each side, each conduit having a flange with a plurality of holes evenly spaced apart around a circle, the conduits being in line and the holes in the flanges being in line, the valve com-prising a thin valve body with flat parallel mounting surfaces for positioning against the flanges, a central bore extending I ~08~96 between the mounting surfaces, closing means within the central - bore, a plurality of threaded mounting holes extending between the mounting surfaces in line with alternate holes in the flanges, a plurality of gaps in the valve body, the gaps in line with the remaining holes in the flanges, a plurality of lug bolts holding each flange to the threaded mounting holes within the valve body to withstand conduit pressure between the valve body and each flange, and a plurality of long bolts extending through the remaining holes in the flanges, connecting the flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
In drawings which illustrate embodiments of the invention, Figure 1 is an elevational side view of a butterfly valve mounted between two flanges.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Figure 3 is a cross-sectional view taken along line
3-3 of Figure 2, Figure 4 is an elevational end view of a butterfly valve mounted on one flange. .
Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4.
The wafer type butterfly valve illustrated as one embodiment of the present invention in Figures l, 2 and 3 has a narrow valve body 10. The valve body 10 has flat, parallel mounting surfaces 11, 12 on each side and a circular flow opening or central bore 13 therethrough between the surfaces 11, 12 The valve has a circular closure disc 14 rotatably mounted within the bore 13~ The disc 14 is fixed to a shaft 15 which projects up from within the central bore 13 through a sleeve 16 in a neck 17 on the valve body 10 for connection ~ ~ 4 -~n ~080196 with a control handle (not shown)0 As shown a resilient, cylindrical liner 18 is mounted within the central bore 13.
The disc 14 sits tightly on the inner surface 19 of the liner 18. The sides 20 of the liner 18 project slightly outside the surfaces 11, 12 of the valve body 10 to provide a tight seal when the valve is mounted between flanges.
The valve body 10 has a set of mounting holes 21 ex-tending between the surfaces 11, 12. The mounting holes 21 are threaded, over their entire length. The holes 21 are ar-10 ranged on a circle 22 concentric about the central bore 13. .
The holes 21 are preferably equally spaced about the circle _ 4A -22. Four such holes 21, spaced 90 apart are shown. This number of mounting holes is satisfactory for valves up to eight inches in diameter. For larger valves up to twelve -inches in diameter, six mounting holes equally spaced apart on circle 22 are required. A standard flange has a predetermined number of standard holes equispaced about a circleO As an example four to eight inch standard flanges have eight holes ~ -equispaced about a circle. Thus four to eight inch valves have four holes equispaced about the same circle, the holes matching every second hole in the flange. Ten and twelve inch flanges have twelve holes equispaced about a circle, thus ten and twelve inch valves have six holes equispaced about the same circle, the holes matching every second hole in the flanges.
The valve body 10 has gaps at the circle 22 to allow long bolts to by-pass the valve body without connecting to the body, when mounting the valve as will be described These gaps preferably comprise portions 23 removed from the peri-pheral edge of the valve body 10 between the mounting surfaces 11, 12. The removed portions 23 allow flange mounting bolts to pass adjacent the body 10 and still be located on the circle 22. Preferably, a removed portion 23 is located between each adjacent pair of mounting holes 21. The removed portions 23 can be provided by making the valve body 10 generally square in shape with the mounting holes 21 located adjacent the ;
corners 24 of the body 10 and the removed portions 23 provided by the removed segments between the sides of the square shaped valve body and the periphery of the adjacent flanges The valve is adapted to be mounted between the end flanges 25, 26 of conduits or pipes 27, 28 respectively as shown in Figure 1. Each flange 25, 26 has a number of mounting holes 29 as shown in Figures 2 and 3, arranged about the circle 22 The number of mounting holes 29 provided in the flanges 1080~96 25, 26 is equal in number to the number of mounting holes 21 in the valve body 10 plus the number of removed portions 23 in the valve body 10, The holes 29 are in line in both flanges and are equally spaced about the circle 22 to match the spacing of the mounting holes 21 and the removed portions 23 in the valve body 10.
Long flange bolts 30 and nuts 31 are provided to join the flanges 25, 26 together with the valve body 10 sand- --wiched tightly therebetween. These long bolts 30, four of which are shown, each pass through aligned holes 29 in both flanges 25, 26 and pass through removed portions 23 of the valve body 10.
In addition four short lug bolts 32 are passed through the other mounting holes 29 in the flange 25 and are threaded into the aligned mounting holes 21 from the surface of the valve body 10. Another four short lug bolts 33 are passed through the other mounting holes 29 in the other flange 26 and are threaded into the aligned mounted holes 21 from the other surface 12 of the valve body 10 The valve body 10 is thus firmly mounted between the flanges 25, 26 by both the long flange bolts 30 and the two opposed sets of lug bolts 32, 33.
Either conduit 27, 28 can be replaced without dis-turbing the valve by removing the long flange bolts 30 and by removing the lug bolts from one flange of the conduit to be replaced. The other lug bolts retain the flange of the other conduit on the valve.
Figures 4 and 5 illustrate the conduit 27 with flange 25 removed from one side of the valve body 10.
Only one set of lug bolts 33 hold the flange 26 to the mounting surface 12 of the valve body 10. The bolts 33 pass through mounting holes 29 in the flange 26 and are ~ ........ . . .
~.
threaded into mounting holes 21 in the valve body 10.
If desired, the valve body 10 can be provided with locating shoulders 34 around the gaps or removed portions 23 on the periphery of the valve bodyO The locating shoulders are shaped to fit around the long flange bolts 30 to locate :~
the valve body 10 during assembly. To assemble the valve body 10 between two flanges, 25 and 26, the two long flange bolts 30 are pushed through the two bottom flange mounting holes 29 on both flanges, and the valve body 10 then set down between the flanges 25, 26 to sit on the bottom flange bolts 30 with the bottom locating shoulder 34 bearing against the bottom flange bolt 30. The valve body 10 may then be pivoted about the bottom flange bolt 30, and the top flange bolt 30 positioned aligning up with the upper locating shoulder 34.
The mounting holes in the flanges 25, 26 and the valve body 10 are then aligned, and the remainder of the flange bolts 30 and lug bolts 32, 33 may then be inserted and tightened to seal the system.
Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4.
The wafer type butterfly valve illustrated as one embodiment of the present invention in Figures l, 2 and 3 has a narrow valve body 10. The valve body 10 has flat, parallel mounting surfaces 11, 12 on each side and a circular flow opening or central bore 13 therethrough between the surfaces 11, 12 The valve has a circular closure disc 14 rotatably mounted within the bore 13~ The disc 14 is fixed to a shaft 15 which projects up from within the central bore 13 through a sleeve 16 in a neck 17 on the valve body 10 for connection ~ ~ 4 -~n ~080196 with a control handle (not shown)0 As shown a resilient, cylindrical liner 18 is mounted within the central bore 13.
The disc 14 sits tightly on the inner surface 19 of the liner 18. The sides 20 of the liner 18 project slightly outside the surfaces 11, 12 of the valve body 10 to provide a tight seal when the valve is mounted between flanges.
The valve body 10 has a set of mounting holes 21 ex-tending between the surfaces 11, 12. The mounting holes 21 are threaded, over their entire length. The holes 21 are ar-10 ranged on a circle 22 concentric about the central bore 13. .
The holes 21 are preferably equally spaced about the circle _ 4A -22. Four such holes 21, spaced 90 apart are shown. This number of mounting holes is satisfactory for valves up to eight inches in diameter. For larger valves up to twelve -inches in diameter, six mounting holes equally spaced apart on circle 22 are required. A standard flange has a predetermined number of standard holes equispaced about a circleO As an example four to eight inch standard flanges have eight holes ~ -equispaced about a circle. Thus four to eight inch valves have four holes equispaced about the same circle, the holes matching every second hole in the flange. Ten and twelve inch flanges have twelve holes equispaced about a circle, thus ten and twelve inch valves have six holes equispaced about the same circle, the holes matching every second hole in the flanges.
The valve body 10 has gaps at the circle 22 to allow long bolts to by-pass the valve body without connecting to the body, when mounting the valve as will be described These gaps preferably comprise portions 23 removed from the peri-pheral edge of the valve body 10 between the mounting surfaces 11, 12. The removed portions 23 allow flange mounting bolts to pass adjacent the body 10 and still be located on the circle 22. Preferably, a removed portion 23 is located between each adjacent pair of mounting holes 21. The removed portions 23 can be provided by making the valve body 10 generally square in shape with the mounting holes 21 located adjacent the ;
corners 24 of the body 10 and the removed portions 23 provided by the removed segments between the sides of the square shaped valve body and the periphery of the adjacent flanges The valve is adapted to be mounted between the end flanges 25, 26 of conduits or pipes 27, 28 respectively as shown in Figure 1. Each flange 25, 26 has a number of mounting holes 29 as shown in Figures 2 and 3, arranged about the circle 22 The number of mounting holes 29 provided in the flanges 1080~96 25, 26 is equal in number to the number of mounting holes 21 in the valve body 10 plus the number of removed portions 23 in the valve body 10, The holes 29 are in line in both flanges and are equally spaced about the circle 22 to match the spacing of the mounting holes 21 and the removed portions 23 in the valve body 10.
Long flange bolts 30 and nuts 31 are provided to join the flanges 25, 26 together with the valve body 10 sand- --wiched tightly therebetween. These long bolts 30, four of which are shown, each pass through aligned holes 29 in both flanges 25, 26 and pass through removed portions 23 of the valve body 10.
In addition four short lug bolts 32 are passed through the other mounting holes 29 in the flange 25 and are threaded into the aligned mounting holes 21 from the surface of the valve body 10. Another four short lug bolts 33 are passed through the other mounting holes 29 in the other flange 26 and are threaded into the aligned mounted holes 21 from the other surface 12 of the valve body 10 The valve body 10 is thus firmly mounted between the flanges 25, 26 by both the long flange bolts 30 and the two opposed sets of lug bolts 32, 33.
Either conduit 27, 28 can be replaced without dis-turbing the valve by removing the long flange bolts 30 and by removing the lug bolts from one flange of the conduit to be replaced. The other lug bolts retain the flange of the other conduit on the valve.
Figures 4 and 5 illustrate the conduit 27 with flange 25 removed from one side of the valve body 10.
Only one set of lug bolts 33 hold the flange 26 to the mounting surface 12 of the valve body 10. The bolts 33 pass through mounting holes 29 in the flange 26 and are ~ ........ . . .
~.
threaded into mounting holes 21 in the valve body 10.
If desired, the valve body 10 can be provided with locating shoulders 34 around the gaps or removed portions 23 on the periphery of the valve bodyO The locating shoulders are shaped to fit around the long flange bolts 30 to locate :~
the valve body 10 during assembly. To assemble the valve body 10 between two flanges, 25 and 26, the two long flange bolts 30 are pushed through the two bottom flange mounting holes 29 on both flanges, and the valve body 10 then set down between the flanges 25, 26 to sit on the bottom flange bolts 30 with the bottom locating shoulder 34 bearing against the bottom flange bolt 30. The valve body 10 may then be pivoted about the bottom flange bolt 30, and the top flange bolt 30 positioned aligning up with the upper locating shoulder 34.
The mounting holes in the flanges 25, 26 and the valve body 10 are then aligned, and the remainder of the flange bolts 30 and lug bolts 32, 33 may then be inserted and tightened to seal the system.
Claims (8)
1. In a wafer type valve for locating between two conduit flanges, including a thin valve body with flat parallel mounting surfaces, a central bore extending between the mounting surfaces, and closing means within the central bore, the improve-ment comprising a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange, and a plurality of gaps in the valve body, the gaps located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
2. The wafer type valve according to claim 1 wherein the gaps comprise portions removed from a peripheral edge of the valve body between the mounting surfaces.
3. The wafer type valve according to claim 2 wherein the mounting holes are equispaced around the circle, and wherein the portions removed from the peripheral edge of the valve body are equispaced about the circle and equispaced between the holes.
4. The wafer type valve according to claim 1 wherein the valve body has a generally square shape with a mounting hole provided at each corner of the valve body.
5. The wafer type valve according to claim 4 including a locating shoulder on one side of the valve body.
6. The wafer type valve according to claim 1 wherein the valve body is made from cast iron.
7. The wafer type valve according to claim 1 wherein the circle is concentric about the central bore.
8. A fluid system including a wafer valve with a conduit on each side, each conduit having a flange, with a plurality of holes evenly spaced apart around a circle, the conduits being in line and the holes in the flange being in line, the valve comprising a thin valve body with flat parallel mounting surfaces for positioning against the flanges a central bore extending between the mounting surfaces, closing means within the central bore, a plurality of threaded mounting holes extending between the mounting surfaces in line with alternate holes in the flanges, a plurality of gaps in the valve body, the gaps in line with the remaining holes in the flanges, a plurality of lug bolts holding each flange to the threaded mounting holes within the valve body, to with-stand conduit pressure between the valve body and each flange, and, a plurality of long bolts extending through the remaining holes in the flanges connecting the flanges together and transferring some bending stress directly from flange to flange omitting the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA318,397A CA1080196A (en) | 1978-12-21 | 1978-12-21 | Semi-lug wafer type butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA318,397A CA1080196A (en) | 1978-12-21 | 1978-12-21 | Semi-lug wafer type butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1080196A true CA1080196A (en) | 1980-06-24 |
Family
ID=4113169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA318,397A Expired CA1080196A (en) | 1978-12-21 | 1978-12-21 | Semi-lug wafer type butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1080196A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2593881A1 (en) * | 1986-02-06 | 1987-08-07 | Oreg | DEVICE FOR FIXING A VALVE TO A FLUID DRIVE AND METHOD OF MOUNTING |
| CN110549280A (en) * | 2019-09-29 | 2019-12-10 | 广船国际有限公司 | butterfly valve positioning tool and using method |
-
1978
- 1978-12-21 CA CA318,397A patent/CA1080196A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2593881A1 (en) * | 1986-02-06 | 1987-08-07 | Oreg | DEVICE FOR FIXING A VALVE TO A FLUID DRIVE AND METHOD OF MOUNTING |
| EP0233827A1 (en) * | 1986-02-06 | 1987-08-26 | OREG (Société anonyme) | Device for connecting a valve to a pipe and method for mounting such a valve |
| CN110549280A (en) * | 2019-09-29 | 2019-12-10 | 广船国际有限公司 | butterfly valve positioning tool and using method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4886305A (en) | Double containment pipe fittings and apparatus to adhesively install the same | |
| EP0774092B1 (en) | multi-ring gasket and use thereof in a joint assembly | |
| US4480861A (en) | Pipe joint and apparatus therefor | |
| US4721330A (en) | Pipe clamp device | |
| FI74336B (en) | EXCENTRISK VALVE WITH SJAELVCENTRERANDE SAETE. | |
| US6948717B1 (en) | Joint assembly employing multi-ring gasket | |
| CA2078799C (en) | Mechanical joint connector and joint employing said connector | |
| US3779511A (en) | Sanitary butterfly valve | |
| US4436326A (en) | Flexible coupling for fluid ducts | |
| US4101112A (en) | Pipe line coupling system | |
| US4767138A (en) | Hubless Flange | |
| CA1080196A (en) | Semi-lug wafer type butterfly valve | |
| US5357997A (en) | Valve with segmented retainer ring | |
| WO2002088590A1 (en) | An arrangement for assembly of pipe flanges, comprising spacers positioned between the pipe flanges | |
| US7104572B1 (en) | Tapping sleeve with mechanical joint connection | |
| US3666237A (en) | Welded fabricated ball valve | |
| CN2441008Y (en) | Pipe leakage stopper | |
| US3401913A (en) | Between flange valve structure | |
| JPH0650448A (en) | Connecting device of valve to piping | |
| JPH032775Y2 (en) | ||
| US4798225A (en) | Seperable valve assembly including a valve mount and a valve body | |
| CN218468316U (en) | Quick-connection three-way ball valve | |
| US3380707A (en) | Ball valve | |
| USRE27570E (en) | Scaramucci ball valve for use between flanges | |
| SU1603128A1 (en) | Detachable pipe joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |