EP0582596A1 - Vannes a element tournant - Google Patents

Vannes a element tournant

Info

Publication number
EP0582596A1
EP0582596A1 EP19920908974 EP92908974A EP0582596A1 EP 0582596 A1 EP0582596 A1 EP 0582596A1 EP 19920908974 EP19920908974 EP 19920908974 EP 92908974 A EP92908974 A EP 92908974A EP 0582596 A1 EP0582596 A1 EP 0582596A1
Authority
EP
European Patent Office
Prior art keywords
seal
valve
seal carrier
housing
carrier
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Withdrawn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
EP19920908974
Other languages
German (de)
English (en)
Inventor
Philip Joseph 64 Mildenhall Road Burton
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.)
Vulsub Property Ltd
Original Assignee
Charles Winn Valves Ltd
Tyco Valves Ltd
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 Charles Winn Valves Ltd, Tyco Valves Ltd filed Critical Charles Winn Valves Ltd
Publication of EP0582596A1 publication Critical patent/EP0582596A1/fr
Withdrawn legal-status Critical Current

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

Definitions

  • This invention relates to valves having a turnable valve member such as butterfly and ball valves.
  • Such valves are commonly used in pipelines for controlling fluid flow.
  • a valve comprises a valve housing provided with an axially directed fluid passage in which is mounted a turnable valve member, and an annular seal assembly encircling the passage and adapted to seal with the valve member at least in a closed position of the valve member, the seal assembly comprising an annular seal carrier which is mounted for limited axial movement in an annular recess in the housing, and a resilient energiser ring which, in radial cross-section of the seal assembly, comprises a substantially radially extending arm, a radially outer portion of the arm bearing against the housing, and a radially inner portion of the arm bearing against one axial end of the seal carrier, at least in some conditions of the valve, the seal carrier carrying on its radially inner side an annular primary seal for sealing engagement with the valve member, at least in the closed condition thereof, and means sealing the radially outer side of the seal carrier tc the valve housing.
  • the last-mentioned sealing means is preferably located in a radially external recess provided in the seal carrier.
  • the radially outer portion of said arm is preferably rigidly clamped to the housing.
  • the housing recess in which the seal carrier is mounted is preferably defined by a substantially radial housing wall at one axial end, but is open at the opposite axial end, at which the radially inner portion of said arm is positioned.
  • the seal carrier is of substantially H-shape in radial cross-section, an annular seal being located in the recess defined by the lower half of the H-shape, and the primary seal being located, but projecting radially inwards from, the recess defined by the upper half of the H-shape.
  • the arrangement is particularly.suited to a soft primary seal, such as a PTFE primary seal.
  • the seal carrier is of substantially h-shape, the primary seal sitting in the open recess defined by the upper limb and horizontal bridge of the h-shape. That arrangement is particularly suitable for a hard primary seal.
  • a gasket is preferably provided between said upper limb of the h-shape seal carrier and the primary limb to provide an effective seal between the primary seal and the seal carrier.
  • Figure 1 is a partial axial cross-section of a first butterfly valve, the seal assembly being shown in the assemblec condition thereof but prior to closing of the disc,
  • Figure 2 is e similar cross-sectional view cf a second butterfly val e, and Figure 3 shows a modification of the valve of Figure 1.
  • valve disc is shown in the closed position in both Figures 1 and 2, this has been done simply to show how there is interference with the primary seal. This interference will in practice result in some axial deflection of the seal carrier to the right in the drawings, against the resilient biassing then exerted by the radially inner portion of the energiser.
  • the valve of Figure 1 comprises an annular valve housing 1 defining an axial fluid passage 2 Cthe axial direction being dictated by arrow 3) in which is pivotally mounted a butterfly valve disc 4 presenting a part-spherical seal-engaging surface 5 to an annular seal assembly 6 carried by the housing.
  • the seal assembly 6 comprises a metal annular seal carrier 7 of H-shape in radial cross-section, as shown in Figure 1, resiliently biassed in the axial direction by a resilient energiser ring 8 in the form of a flat annular washer, the radially inner portion 9 of the ring 8 bearing against an annular, axially directed rib 10 on the seal carrier 7, and the radially outer portion 11 of the ring 8 being clamped between the housing 1 and an annular, metal retaining ring 12, gaskets 13 being provided on either side of the clamped outer portion 11.
  • Seal carrier 7 carries an annular primary seal 14 of PTFE of substantially right-angle trapezium shape in radial cross-section fitting snugly the annular radially inwardly facing recess of the seal carrier, and a proprietary O-ring 15 housed in the radially outwardly facing recess of the seal carrier.
  • the corresponding recess can be filled with graphite to provide a graphite ring.
  • a graphite ring is suitable for both high temperature and cryogenic applications of the valve.
  • the seal carrier itself is slidable axially of the housing in an internal corner-recess in the housing 1, the recess being defined by a radial housing face 16 and by a cylindrical radially inwardly facing or axial face 17, and the seal carrier is sealed to the axial face 17 by the seal 15, and in turn to the closed valve disc 4 by the sealing engagement between the primary seal 14 and the face 5 of the closed disc 4. Sliding engagement between seal carrier 7 and surface 17 prevents tilting of the seal carrier 7.
  • Figure 1 does not show the rightwards axial deflection of the seal carrier 7 from housing face 16 which results from the engagement between the disc face 5 and the primary seal 14 when the disc 4 is turned to the closed position shown. Only the interference between the dimensions of the closed disc and the undeflected primary seal 14 is shown in Figure 1.
  • the resulting rightwards movement of the seal carrier 7 on closure of the disc 4 results in resilient deflection of the radially inner portion 9 of the energiser ring 8 to the right, relative to housing 1, through the engagement of rib 10 on portion 9.
  • rib 10 ensures that the length of the lever arm of the portion 9 is precisely determined so as to provide a controlled biassing force urging primary seal 14 against disc face 5.
  • the PTFE soft seal 14 has beer, replaced by a relatively hard seal 14 of a sintered nickel /graphite composite backed by an annular gasket 14 of graphite, and since the hard seal 14 retains its shape, it is not necessary to confine the seal 14 to the same degree as in Figure 1.
  • the h-shape of the seal carrier 7 of Figure 1 has been replaced by a metal sea" carrier 7 of h-shape in cross-section, the sea "1 14 being housec ir tne corner recess of the h-shape.
  • the rightwards deflection of the seal carrier 7 in Figure 2 resulting from closing of the butterfly disc 4 has not been shown in Figure 2.
  • Such a deflection is generally enhanced in a butterfly valve by arranging the disc to have a double-offset of the pivotal axis of the disc from the centre of curvature of disc surface 5.
  • This double-offset feature is well known and well understood by the skilled person in this field and will not be further described.
  • the energiser ring 8 of Figure 1 has been extended radially inwardly as a cusp 18 which engages with surface 5 in the closed condition of the valve to provide a secondary seal with the valve member.
  • this secondary seal can provide a fire-safe function, whereby seal 14 provides a normal soft seal with the valve disc, and the metal cusp 18 provides a reserve seal in the event of destruction of the soft seal 14.
  • the manner of operation of the cusp 18 can be arranged to be as described in our patent specification no. GB 2,105,823B. In that specification the cusp is described as having a rolling/wedging action under certain conditions of use.

Landscapes

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

Abstract

Une vanne-papillon comprend un joint d'étanchéité (16) destiné à venir en prise avec le disque de la vanne fermée (4) sous forme d'un joint d'étanchéité primaire (14) porté dans l'un des évidements en forme de H (Figure 1) ou en forme de h (Figure 2), le support de la vanne (7) étant axialement coulissant par rapport au corps de la vanne (1), et étant axialement incliné à l'aide d'une rondelle (8), le joint primaire (14) étant appliqué contre le disque fermé (4).
EP19920908974 1991-04-30 1992-04-29 Vannes a element tournant Withdrawn EP0582596A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919109456A GB9109456D0 (en) 1991-04-30 1991-04-30 Valves having a turnable valve member
GB9109456 1991-04-30

Publications (1)

Publication Number Publication Date
EP0582596A1 true EP0582596A1 (fr) 1994-02-16

Family

ID=10694313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920908974 Withdrawn EP0582596A1 (fr) 1991-04-30 1992-04-29 Vannes a element tournant

Country Status (4)

Country Link
EP (1) EP0582596A1 (fr)
AU (1) AU1660092A (fr)
GB (1) GB9109456D0 (fr)
WO (1) WO1992019894A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5427354A (en) * 1994-06-03 1995-06-27 Keystone International Holdings Corp. Valve assembly
DE19941888A1 (de) * 1999-09-02 2001-03-08 Linde Ag Armatur
WO2009008061A1 (fr) * 2007-07-10 2009-01-15 Tomoe Technical Research Company Limited Vanne papillon excentrée
US20110042936A1 (en) * 2009-08-21 2011-02-24 OPW Engineered Systems Swivel assemblies for loading arms and loading arms comprising the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH485153A (de) * 1968-01-05 1970-01-31 Istag Ag Suhr Ag Hahn mit Kugelküken
CA1080684A (fr) * 1977-03-15 1980-07-01 Kenneth C. Simmons Bague d'etancheite de soupapes, resistant aux temperatures elevees
EP0074782B1 (fr) * 1981-09-11 1985-12-27 Charles Winn (Valves) Limited Vanne papillon
GB8819741D0 (en) * 1988-08-19 1988-09-21 Hattersley Heaton Ltd Seat for butterfly valve
GB2227072B (en) * 1989-01-10 1992-12-23 Charles Winn Valves having a turnable closure member such as a butterfly valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9219894A1 *

Also Published As

Publication number Publication date
AU1660092A (en) 1992-12-21
GB9109456D0 (en) 1991-06-26
WO1992019894A1 (fr) 1992-11-12

Similar Documents

Publication Publication Date Title
US3894718A (en) Ball valve
US4293116A (en) Metallic seat assembly for valves
US4558874A (en) Valve stem packing assembly
US4750709A (en) Diaphragm valve
US4396199A (en) Fluid pressure sealing member for a valve
CA2022784C (fr) Vanne a opercule tournant et garniture d'etancheite
JPS62288786A (ja) ダイアフラム弁
JPS60500820A (ja) バルブステムパッキング組立体
EP0110012B1 (fr) Assemblage de soupape
CA1166230A (fr) Siege a l'epreuve du feu pour robinet
US4531537A (en) Plug valve for reduced leakage
JPH0444148B2 (fr)
US4220172A (en) Fire safe butterfly valve
US4260131A (en) Low and high operating temperatures valve
EP0124234B1 (fr) Vanne
KR950003668A (ko) 회전밸브와 나비밸브
EP0216200B1 (fr) Obturateur, en particulier pour des fluides de haute température
EP0025402B1 (fr) Valve pour service cryogénique et garniture d'étanchéité y destinée
US4792118A (en) Low dead space ring
GB1561593A (en) Valve structure
US4580763A (en) Seal-seat for use in ball valves
CA1105439A (fr) Siege metallique de robinetterie
US4335748A (en) Bidirectional control valve
EP0582596A1 (fr) Vannes a element tournant
US5478047A (en) Flexible seating structure for valves

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19931118

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB NL

17Q First examination report despatched

Effective date: 19950406

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TYCO VALVES LIMITED

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19961105