GB1576020A - Butterfly valve - Google Patents
Butterfly valve Download PDFInfo
- Publication number
- GB1576020A GB1576020A GB13882/77A GB1388277A GB1576020A GB 1576020 A GB1576020 A GB 1576020A GB 13882/77 A GB13882/77 A GB 13882/77A GB 1388277 A GB1388277 A GB 1388277A GB 1576020 A GB1576020 A GB 1576020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lining
- valve
- radially
- sealing portion
- recess
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Glass Compositions (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Saccharide Compounds (AREA)
- Valve Housings (AREA)
Description
(54) BUTTERFLY VALVE
(71) We, BESTOBELL VALVES LLMI- TED, ' a British company, of Greasbrough
Road, Rotherham, South Yorkshire
S60 1RE, do ' hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be' performed, to be particularly de -scribed in and by the following ,' state- ment: - The invention relates to butterfly valves of the usual kind comprising a body surrounding a substantially cylindrical tubular passageway and containing a closure flap which swings between an open position within the passageway and a closed position in which the periphery of the flap seals against the surrounding body.
A secure seal between the periphery of the closure flap and the surrounding body is sometimes provided by forming the periphery of the closure flap of resilient material, or lining the inner surface of the body with a resilient lining, or by mounting in the body a resilient seal which projects radially inwardly into the passageway.
The use of an inwardly projecting seal has
the advantages that it can be shaped to make a good seal against the closure flap but the disadvantage that the projecting seal interferes with the smooth flow through the passageway when the valve is open. It has been proposed to overcome this latter disadvantage by providing a separate lining substantially flush with the radially inner part of the seal and butting against the projecting seal but this involves the use of additional parts and can interfere with the seal function.
In accordance with the present invention, a butterfly valve has a body surrounding a substantially cylindrical passageway and a closure flap which swivels within the passageway, the' body having a resilient lining which lines the body internally and defines the fluid passageway and which is provided with an integral, annular sealing portion against which the periphery of the flap engages in the - closed position, the sealing portion sprouting from the base of an annular recess in the inner surface of the lining and projecting radially inwardly to a position substantially flush with the surface defining the passageway, each axially facing side of the sealing portion being spaced from an adjacent side of the recess to provide a radially extending groove having a narrow, radially inner portion opening into the fluid passageway and a wider, radially outer portion with a cross-section bounded by a curvilinear periphery and undercutting an axially projecting lip of the sealing portion.
With this construction the sealing portion does not project significantly into the passageway, although in practice the annular tips of the lips may project slightly into the passageway. However, when the closure flap is in a closed position, a good seal is made against the flap as the fluid pressure on the high pressure side of the flap acts under the lip and urges it towards the closure flap.
The radially innermost surface of the sealing portion between the axial extremities of the sealing lips may be slightly recessed so that the lips project radially inwardly as well as axially.
At each axial end the lining may have a radially outwardly projecting integral flange which is wrapped around the body to locate the lining in position.
The integral lining and sealing portion, may be made of a material such as rubber, or a resilient synthetic plastics material such as nitrile rubber, PTFE, or PCTFE.
PCTFE is preferred to PTFE for cryogenic applications as it retains its flexibility better at subambient temperatures.
One example of a butterfly valve con struted in accordance with the present invention is illustrated in the accompanying drawings, in which: Figure 1 is a side elevation as seen from the left in Figure 2;
Figure 2 is, an end elevation with parts in section;
Figure 3, is a sectionttaken on the line III-III in Figure 2 with the valve closed; and Figure 4 is a section corresponding to part of Figure 3 with the valve open.
The illustrated valve has an annular cylindrical metal body 4 provided on one side with a radially outwardly projecting spindle housing 5. Two webs 6 provided with bolt holes 7 extend between an annular flange 8 at the outer end of the housing 5 and the main part of the body 4.
The body 4 is lined with an annular cylindrical replaceable lining 9 made of nitrile rubber and provided at its axial ends with integral radially outwardly extending flanges 10 which are wrapped around the ends of the body 4 and seat in recesses 11 in the body end walls. Midway along its length the lining 9 is formed with an annular recess 12 from the base of which there sprouts an integral annular sealing portion 13.Each axially facing side of the sealing portion 13 is spaced from an adjacent side of the recess 12 to provide a radially extending groove having a narrow, radially inner portion opening into the fluid passageway and defined by a radially extending part of the side of the recess 12 and an adjacent radially extending part of the sealing portion 13; and a wider, radially outer portion with a cross-section bounded by a curvilinear periphery and undercutting an axially projecting lip 14 of the sealing portion 13, the curvilinear periphery being substantially part circular. As shown in
Figure 4, the radially inwardly facing surfaces of the lips 14 are inclined in a shallow V-shape towards one another and are separated by a groove 15.
The valve has a circular closure flap 16 which is fixed by two screws 17 on a spindle 18 which is rotatably mounted in PFTE coated brass bearings 19 in the spindle housing 5 and in the diametrically opposite portion 20 of the body 4. The lining 9 closely surrounds the spindle where it passes through the lining to seal the spindle to the body. The spindle 18 is fixed to an operating handle 21, although it may be rotated mechanically in other applications, such that rotation of the handle 21 through 90" rotates the spindle 18 and the closure flap 16 between the fully closed position shown in Figure 3 and a fully open position.The position of the closure flap at any time is indicated by a pointer 22 which is fixed to the handle 21 and is aligned with a mark C on a plate 23 fixed to the flange 8 in the fully closed position, and with a mark 0 in the fully open position. The handle may be located in one of a number of selected positions by a wing head screw 24 which screws through a portion 25 of the handle 21 and engages in a selected one of a number of recesses in a rack portion 26 on the flange 8.
In use the flap is used as a wafer valve and the body 4 is sandwiched between adjacent conduit modules which are drawn up together by a ring of bolts which extend radially outwardly of the body 4 between the adjacent modules, two of the bolts passing through the holes 7 in the webs 6.
A seal is made between each end of the valve and the adjacent conduit module by compression of the respective flange 10 of the lining 9. During this compression some of the resilient material from which the lining is made will be forced into a pair of machined grooves 27 in the bottom of the respective recess 11 to assist in keying the lining in position. The inner cylindrical peripheral surface of the lining 9 will be aligned with the fluid passageway through the adjacent conduit modules.
Since the valve is symmetrical, it can be used equally efficiently irrespective of the direction of flow through the valve. When the valve is closed as shown in Figure 3, the edge of the flap 16 seals against both the lips 14 of the sealing portion 13, the sealing engagement being enhanced by the fluid pressure on the high pressure side acting on the undercut of a respective one of the lips 14 thereby urging the lip more firmly into engagement with the periphery of the flap 16. When the valve is opened, the sealing portion 13 adopts the configuration shown in Figure 4 in which the extreme tips of the lips 14 are substantially in alignment with the inner cylindrical peri-: pheral surface of the lining 9 so as not to provide any significant obstruction to fluid flow through the valve.
WHAT WE CLAIM IS: 1. A butterfly valve having a body surrounding a substantially cylindrical passageway and a closure flap which swivels within the passageway, the body having a resilient lining which lines the body internally and defines the fluid passageway and which is provided with an integral, annular sealing portion against which the periphery of the flap engages in the closed position, the sealing portion sprouting from the base of an annular recess in the inner surface of the lining and projecting radially inwardly to a position substantially flush with the surface defining the passageway, each axially facing side of the sealing portion being spaced from an adjacent side of the recess to provide a radially extending groove having a narrow, radially inner portion opening into the fluid passageway and a wider, radially outer portion with a cross-section bounded by a curvilinear periphery and undercutting an axially projecting lip of the sealing portion.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (6)
1. A butterfly valve having a body surrounding a substantially cylindrical passageway and a closure flap which swivels within the passageway, the body having a resilient lining which lines the body internally and defines the fluid passageway and which is provided with an integral, annular sealing portion against which the periphery of the flap engages in the closed position, the sealing portion sprouting from the base of an annular recess in the inner surface of the lining and projecting radially inwardly to a position substantially flush with the surface defining the passageway, each axially facing side of the sealing portion being spaced from an adjacent side of the recess to provide a radially extending groove having a narrow, radially inner portion opening into the fluid passageway and a wider, radially outer portion with a cross-section bounded by a curvilinear periphery and undercutting an axially projecting lip of the sealing portion.
2. A valve according to claim 1, in
which the radially innermost surface of the sealing portion between the axial extremities of the sealing lip is slightly recessed so that the lips project radially inwardly as well as axially.
3. A valve according to claim 1 or claim 2, in which, at each axial end, the lining has a radially outwardly projecting integral flange which is wrapped around the body to locate the lining in position.
4. A valve according to any of the preceding claims, wherein the curvilinear periphery of the radially outer portion of the groove is substantially part circular.
5. A valve according to claim 4, wherein the radially inner portion of the groove is defined by a radially extending part of the side of the recess and an adjacent radially extending part of the sealing portion, the radially extending part of the side of the recess merging tangentially into the substantially part circular part of the sealing portion to define the radially outer portion of the groove.
6. A valve according to claim 1, substantially as described with reference to the accompanying drawings.
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13882/77A GB1576020A (en) | 1977-04-01 | 1977-04-01 | Butterfly valve |
ZA00781452A ZA781452B (en) | 1977-04-01 | 1978-03-13 | Butterfly valve |
NO780919A NO780919L (en) | 1977-04-01 | 1978-03-15 | THRAP VALVE. |
DE19782813135 DE2813135A1 (en) | 1977-04-01 | 1978-03-25 | FLAP VALVE |
CA299,761A CA1076092A (en) | 1977-04-01 | 1978-03-28 | Butterfly valve |
BE186405A BE865494A (en) | 1977-04-01 | 1978-03-30 | BUTTERFLY VALVE |
ES468373A ES468373A1 (en) | 1977-04-01 | 1978-03-30 | Butterfly valve |
BR7801942A BR7801942A (en) | 1977-04-01 | 1978-03-30 | BUTTERFLY VALVE |
SE7803597A SE7803597L (en) | 1977-04-01 | 1978-03-30 | THRAP VALVE |
FR7809648A FR2385959A1 (en) | 1977-04-01 | 1978-03-31 | FLUSH SEAL BUTTERFLY VALVE |
JP3690878A JPS53122936A (en) | 1977-04-01 | 1978-03-31 | Butterfly form valve |
NL7803429A NL7803429A (en) | 1977-04-01 | 1978-03-31 | WING VALVE. |
DK144878A DK144878A (en) | 1977-04-01 | 1978-03-31 | BUTTERFLY VALVE |
AU34659/78A AU3465978A (en) | 1977-04-01 | 1978-03-31 | Butterfly valve |
IT7867713A IT7867713A0 (en) | 1977-04-01 | 1978-03-31 | BUTTERFLY VALVE SEAL FOR FLUID PIPELINES |
LU79348A LU79348A1 (en) | 1977-04-01 | 1978-03-31 | BUTTERFLY VALVES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13882/77A GB1576020A (en) | 1977-04-01 | 1977-04-01 | Butterfly valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1576020A true GB1576020A (en) | 1980-10-01 |
Family
ID=10031072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13882/77A Expired GB1576020A (en) | 1977-04-01 | 1977-04-01 | Butterfly valve |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPS53122936A (en) |
AU (1) | AU3465978A (en) |
BE (1) | BE865494A (en) |
BR (1) | BR7801942A (en) |
CA (1) | CA1076092A (en) |
DE (1) | DE2813135A1 (en) |
DK (1) | DK144878A (en) |
ES (1) | ES468373A1 (en) |
FR (1) | FR2385959A1 (en) |
GB (1) | GB1576020A (en) |
IT (1) | IT7867713A0 (en) |
LU (1) | LU79348A1 (en) |
NL (1) | NL7803429A (en) |
NO (1) | NO780919L (en) |
SE (1) | SE7803597L (en) |
ZA (1) | ZA781452B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984004794A1 (en) * | 1983-05-31 | 1984-12-06 | Richards & Co B C | A valve seal suitable for cryogenic service |
CN111173621A (en) * | 2020-01-17 | 2020-05-19 | 杰锋汽车动力***股份有限公司 | New energy automobile electron air throttle structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2821091C2 (en) * | 1978-05-13 | 1986-11-13 | Josef 6200 Wiesbaden Nemetz | Butterfly valve |
JPS5637758U (en) * | 1979-08-31 | 1981-04-10 |
-
1977
- 1977-04-01 GB GB13882/77A patent/GB1576020A/en not_active Expired
-
1978
- 1978-03-13 ZA ZA00781452A patent/ZA781452B/en unknown
- 1978-03-15 NO NO780919A patent/NO780919L/en unknown
- 1978-03-25 DE DE19782813135 patent/DE2813135A1/en not_active Withdrawn
- 1978-03-28 CA CA299,761A patent/CA1076092A/en not_active Expired
- 1978-03-30 SE SE7803597A patent/SE7803597L/en unknown
- 1978-03-30 BR BR7801942A patent/BR7801942A/en unknown
- 1978-03-30 BE BE186405A patent/BE865494A/en unknown
- 1978-03-30 ES ES468373A patent/ES468373A1/en not_active Expired
- 1978-03-31 AU AU34659/78A patent/AU3465978A/en active Pending
- 1978-03-31 LU LU79348A patent/LU79348A1/en unknown
- 1978-03-31 FR FR7809648A patent/FR2385959A1/en active Granted
- 1978-03-31 IT IT7867713A patent/IT7867713A0/en unknown
- 1978-03-31 JP JP3690878A patent/JPS53122936A/en active Pending
- 1978-03-31 DK DK144878A patent/DK144878A/en not_active IP Right Cessation
- 1978-03-31 NL NL7803429A patent/NL7803429A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984004794A1 (en) * | 1983-05-31 | 1984-12-06 | Richards & Co B C | A valve seal suitable for cryogenic service |
CN111173621A (en) * | 2020-01-17 | 2020-05-19 | 杰锋汽车动力***股份有限公司 | New energy automobile electron air throttle structure |
Also Published As
Publication number | Publication date |
---|---|
LU79348A1 (en) | 1978-07-13 |
ZA781452B (en) | 1979-04-25 |
DK144878A (en) | 1978-10-02 |
BR7801942A (en) | 1978-11-21 |
BE865494A (en) | 1978-07-17 |
NL7803429A (en) | 1978-10-03 |
ES468373A1 (en) | 1978-12-01 |
NO780919L (en) | 1978-10-03 |
CA1076092A (en) | 1980-04-22 |
AU3465978A (en) | 1979-10-04 |
DE2813135A1 (en) | 1978-10-12 |
FR2385959B3 (en) | 1980-12-19 |
JPS53122936A (en) | 1978-10-26 |
FR2385959A1 (en) | 1978-10-27 |
SE7803597L (en) | 1978-10-02 |
IT7867713A0 (en) | 1978-03-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |