GB2172381A - Butterfly valve - Google Patents

Butterfly valve Download PDF

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Publication number
GB2172381A
GB2172381A GB08527841A GB8527841A GB2172381A GB 2172381 A GB2172381 A GB 2172381A GB 08527841 A GB08527841 A GB 08527841A GB 8527841 A GB8527841 A GB 8527841A GB 2172381 A GB2172381 A GB 2172381A
Authority
GB
United Kingdom
Prior art keywords
flap
frame
butterfly valve
periphery
axis
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.)
Withdrawn
Application number
GB08527841A
Other versions
GB8527841D0 (en
Inventor
Luca Raul Petzwinkler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB8527841D0 publication Critical patent/GB8527841D0/en
Publication of GB2172381A publication Critical patent/GB2172381A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • F16K1/222—Shaping of the valve member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

A butterfly valve comprises a planar flap (10) rotatable in a frame (12) about the axis (14) shown by a chain line through 90 DEG to control a flow of fluid through the frame. The central plane of the flap is off-set from said axis by about 20 DEG . The frame has opposed upstanding flanges (20) engaging edge surfaces of the flap when closed. The flap is supported by axes fixed in non-aligned apertures (22, 24). <IMAGE>

Description

SPECIFICATION Butterfly valve This invention relates to butterfly valves.
Butterfly valves are well known for use in controlling through-flow of fluids and usually comprise a circular planar disc which is supported in a fluid passage to be rotated about central axis in the plane of the circular flap. In one position the flap fully closes off the passage and when rotated 90" from that position the flap offers a minimum obstruction to the flow of fluid. At intermediate positions the flap offers more of an obstruction and hence can reduce the rate of flow of fluid as compared to the fully open position.
According to the invention there is provided a butterfly valve comprising a planar flap supported in a frame to rotate about an axis extending across the frame and control a flow of fluid through the frame in which the central plane of the flap is off-set from the said axis by a few degrees.
The central plane may be off-set by 4" to 30 , and preferably at about 20 .
The inside of the frame and the flap are usually circular in cross-section.
The inside of the frame may have opposing upstanding flanges which bear against respective edge surfaces of the flap when the flap is in a closed position and allowthe flap to rotate in only one direction from the closed position.
A seal may be mounted around the periphery of the flap. The seal may comprise material moulded onto the periphery of the flap or into a groove in the periphery of the flap where provided.
A butterfly valve according to the invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 shows a front elevation of a frame for the valve; Figure 2 shows a sectional side view of the frame; Figure 3 shows an isometric view of a flap for the valve; and Figure 4 shows a schematic view of an assembled valve.
Referring to the drawing, the butterfly valve has a planar flap 10 arranged to be mounted in a frame 12 and to rotate about a transverse axis 14. The central plane 16 of the flap 10 is at about 20 to the axis 14 when the flap is fitted in the frame 12. It will be noted in Figure 1 that the inside cross-section of the frame 12 is shaped to provide opposing upstanding flanges 20 which engage against the respective edge surfaces of the flap 10 when the valve is closed and also prevent over-rotation of the flap 10 beyond 90" from a fully closed position.
The flap 10 is supported by axles (not shown) fixed in the apertures 22 and 24 (Figure 3) which rotate in the holes 26 and 28 (Figure 2). It will be seen in Figure 3 that the axles will not be exactly aligned with one another and this tends to produce the effect of assisting the flap to "kick in" when close to its open or its closed position.
The periphery of the flap is fitted with a Viton (trade mark) rubber sealing ring 30 which is bonded to the flap and fits into a peripheral groove formed in the flap 10. The sealing ring could be formed of other materials such as plastics material or compositions and, where rubber, can be moulded in and vulcanised onto the groove in the periphery of the flap 10.
The flap 10 is normally rotated by having one of the axles extending through the frame 12 and by fitting with a lever on the protruding part of the axle.
The movement of the lever or rotation of the flap 10 may be controlled so as to be securable in a number of intermediate chosen positions as well as at the fully closed and the fully open positions.
The frame 14 is preferably made of metal and usually of cast iron, aluminium or stainless steel.
Whereas the axle 14 is transverse to the frame and hence to the flow of fluid in use through the frame, it will be appreciated the axis 14 may be at an angle, that is, not exactly transverse to the frame where preferred.
1. A butterfly valve comprising a planarflap supported in a frame to rotate about an axis extending across the frame and control a flow of fluid through the frame in which the central plane of the flap is off-set from the said axis by a few degrees.
2. A butterfly valve according to Claim 1, in which the central plane is off-set by 4" to 30".
3. A butterfly valve according to Claim 1 or 2, in which the central plane is off-set by approximately 20 .
4. A butterfly valve according to any one of Claims 1 to 3, in which the inside of the frame and the flap are circular in cross-section.
5. A butterfly valve according to any one of claims 1 to 4, in which the inside of the frame has opposing upstanding flanges which bear against respective edge surfaces of the flap when the flap is in a closed position and allow the flap to rotate in only one direction from the closed position.
6. A butterfly valve according to any one of claims 1 to 5, including a seal mounted around the periphery of the flap.
7. A butterfly valve according to Claim 6, in which the seal comprises material moulded onto the periphery of the flap.
8. A butterfly valve according to Claim 6, in which the seal comprises material moulded into a groove extending around the periphery of the flap.
9. A butterfly valve substantially as herein de scribedwith reference to Figures 1 to 4 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Butterfly valve This invention relates to butterfly valves. Butterfly valves are well known for use in controlling through-flow of fluids and usually comprise a circular planar disc which is supported in a fluid passage to be rotated about central axis in the plane of the circular flap. In one position the flap fully closes off the passage and when rotated 90" from that position the flap offers a minimum obstruction to the flow of fluid. At intermediate positions the flap offers more of an obstruction and hence can reduce the rate of flow of fluid as compared to the fully open position. According to the invention there is provided a butterfly valve comprising a planar flap supported in a frame to rotate about an axis extending across the frame and control a flow of fluid through the frame in which the central plane of the flap is off-set from the said axis by a few degrees. The central plane may be off-set by 4" to 30 , and preferably at about 20 . The inside of the frame and the flap are usually circular in cross-section. The inside of the frame may have opposing upstanding flanges which bear against respective edge surfaces of the flap when the flap is in a closed position and allowthe flap to rotate in only one direction from the closed position. A seal may be mounted around the periphery of the flap. The seal may comprise material moulded onto the periphery of the flap or into a groove in the periphery of the flap where provided. A butterfly valve according to the invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 shows a front elevation of a frame for the valve; Figure 2 shows a sectional side view of the frame; Figure 3 shows an isometric view of a flap for the valve; and Figure 4 shows a schematic view of an assembled valve. Referring to the drawing, the butterfly valve has a planar flap 10 arranged to be mounted in a frame 12 and to rotate about a transverse axis 14. The central plane 16 of the flap 10 is at about 20 to the axis 14 when the flap is fitted in the frame 12. It will be noted in Figure 1 that the inside cross-section of the frame 12 is shaped to provide opposing upstanding flanges 20 which engage against the respective edge surfaces of the flap 10 when the valve is closed and also prevent over-rotation of the flap 10 beyond 90" from a fully closed position. The flap 10 is supported by axles (not shown) fixed in the apertures 22 and 24 (Figure 3) which rotate in the holes 26 and 28 (Figure 2). It will be seen in Figure 3 that the axles will not be exactly aligned with one another and this tends to produce the effect of assisting the flap to "kick in" when close to its open or its closed position. The periphery of the flap is fitted with a Viton (trade mark) rubber sealing ring 30 which is bonded to the flap and fits into a peripheral groove formed in the flap 10. The sealing ring could be formed of other materials such as plastics material or compositions and, where rubber, can be moulded in and vulcanised onto the groove in the periphery of the flap 10. The flap 10 is normally rotated by having one of the axles extending through the frame 12 and by fitting with a lever on the protruding part of the axle. The movement of the lever or rotation of the flap 10 may be controlled so as to be securable in a number of intermediate chosen positions as well as at the fully closed and the fully open positions. The frame 14 is preferably made of metal and usually of cast iron, aluminium or stainless steel. Whereas the axle 14 is transverse to the frame and hence to the flow of fluid in use through the frame, it will be appreciated the axis 14 may be at an angle, that is, not exactly transverse to the frame where preferred. CLAIMS
1. A butterfly valve comprising a planarflap supported in a frame to rotate about an axis extending across the frame and control a flow of fluid through the frame in which the central plane of the flap is off-set from the said axis by a few degrees.
2. A butterfly valve according to Claim 1, in which the central plane is off-set by 4" to 30".
3. A butterfly valve according to Claim 1 or 2, in which the central plane is off-set by approximately 20 .
4. A butterfly valve according to any one of Claims 1 to 3, in which the inside of the frame and the flap are circular in cross-section.
5. A butterfly valve according to any one of claims 1 to 4, in which the inside of the frame has opposing upstanding flanges which bear against respective edge surfaces of the flap when the flap is in a closed position and allow the flap to rotate in only one direction from the closed position.
6. A butterfly valve according to any one of claims 1 to 5, including a seal mounted around the periphery of the flap.
7. A butterfly valve according to Claim 6, in which the seal comprises material moulded onto the periphery of the flap.
8. A butterfly valve according to Claim 6, in which the seal comprises material moulded into a groove extending around the periphery of the flap.
9. A butterfly valve substantially as herein de scribedwith reference to Figures 1 to 4 of the accompanying drawings.
GB08527841A 1985-03-04 1985-11-12 Butterfly valve Withdrawn GB2172381A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA851600 1985-03-04
ZA857229A ZA857229B (en) 1985-03-04 1985-09-20 Butterfly valve

Publications (2)

Publication Number Publication Date
GB8527841D0 GB8527841D0 (en) 1985-12-18
GB2172381A true GB2172381A (en) 1986-09-17

Family

ID=27136073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08527841A Withdrawn GB2172381A (en) 1985-03-04 1985-11-12 Butterfly valve

Country Status (2)

Country Link
GB (1) GB2172381A (en)
ZA (1) ZA857229B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327045A1 (en) * 2003-06-16 2005-04-07 Siemens Ag Throttle valve
DE10359609A1 (en) * 2003-12-18 2005-07-28 Siemens Ag Throttle connection fitting for use in air conduit, has throttle valve that runs diagonally and aligned symmetrically between bearings of valve shaft, where longitudinal axes of valve and seat are normal
DE102004012507A1 (en) * 2004-03-15 2005-10-06 Siemens Ag Throttle valve housing on outer edge has encompassing slot in which is installed U-ring seal, the annular groove of which faces away from suction side of housing
US7114486B2 (en) 2003-03-10 2006-10-03 Siemens Ag Subunit of a throttle valve housing
FR2940367A1 (en) * 2008-12-22 2010-06-25 Valeo Sys Controle Moteur Sas Shuttering device for use between air distributor and cylinder head for closing air intake duct of injection engine of vehicle, has flap equipped with seal on periphery to ensure sealing between walls of duct and flaps

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB782836A (en) * 1954-10-22 1957-09-11 Glenfield & Kennedy Ltd Improvements in or relating to butterfly valves
GB930836A (en) * 1959-12-23 1963-07-10 Lionel George Atherton Improvements in fluid flow control valves
GB932085A (en) * 1959-08-12 1963-07-24 Washington Engineering Ltd Improvements in or relating to butterfly valves
GB985164A (en) * 1963-03-01 1965-03-03 Normalair Ltd Improvements in or relating to butterfly valves
US3612483A (en) * 1968-04-12 1971-10-12 Rockwell Mfg Co Valves with deformable sealing
GB1297623A (en) * 1968-12-04 1972-11-29
GB1319332A (en) * 1969-09-17 1973-06-06 Andrews Ind Balanced rotary plate valve
US3910555A (en) * 1973-12-26 1975-10-07 Dover Corp Butterfly valves disc with dovetail groove
GB1438037A (en) * 1972-07-22 1976-06-03 Bopp & Reuther Gmbh Pivoted valves
GB1585136A (en) * 1976-10-29 1981-02-25 Trox Gmbh Geb Flap valves
US4518150A (en) * 1983-09-06 1985-05-21 Dover Corporation Valve with split ring retainer

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB782836A (en) * 1954-10-22 1957-09-11 Glenfield & Kennedy Ltd Improvements in or relating to butterfly valves
GB932085A (en) * 1959-08-12 1963-07-24 Washington Engineering Ltd Improvements in or relating to butterfly valves
GB930836A (en) * 1959-12-23 1963-07-10 Lionel George Atherton Improvements in fluid flow control valves
GB985164A (en) * 1963-03-01 1965-03-03 Normalair Ltd Improvements in or relating to butterfly valves
US3612483A (en) * 1968-04-12 1971-10-12 Rockwell Mfg Co Valves with deformable sealing
GB1297623A (en) * 1968-12-04 1972-11-29
GB1319332A (en) * 1969-09-17 1973-06-06 Andrews Ind Balanced rotary plate valve
GB1438037A (en) * 1972-07-22 1976-06-03 Bopp & Reuther Gmbh Pivoted valves
US3910555A (en) * 1973-12-26 1975-10-07 Dover Corp Butterfly valves disc with dovetail groove
GB1585136A (en) * 1976-10-29 1981-02-25 Trox Gmbh Geb Flap valves
US4518150A (en) * 1983-09-06 1985-05-21 Dover Corporation Valve with split ring retainer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7114486B2 (en) 2003-03-10 2006-10-03 Siemens Ag Subunit of a throttle valve housing
DE10327045A1 (en) * 2003-06-16 2005-04-07 Siemens Ag Throttle valve
US7237529B2 (en) 2003-06-16 2007-07-03 Siemens Ag Throttle valve positioning device
DE10359609A1 (en) * 2003-12-18 2005-07-28 Siemens Ag Throttle connection fitting for use in air conduit, has throttle valve that runs diagonally and aligned symmetrically between bearings of valve shaft, where longitudinal axes of valve and seat are normal
DE102004012507A1 (en) * 2004-03-15 2005-10-06 Siemens Ag Throttle valve housing on outer edge has encompassing slot in which is installed U-ring seal, the annular groove of which faces away from suction side of housing
FR2940367A1 (en) * 2008-12-22 2010-06-25 Valeo Sys Controle Moteur Sas Shuttering device for use between air distributor and cylinder head for closing air intake duct of injection engine of vehicle, has flap equipped with seal on periphery to ensure sealing between walls of duct and flaps

Also Published As

Publication number Publication date
GB8527841D0 (en) 1985-12-18
ZA857229B (en) 1986-05-28

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)