EP0513268A1 - Robinet a membrane - Google Patents

Robinet a membrane

Info

Publication number
EP0513268A1
EP0513268A1 EP19910919885 EP91919885A EP0513268A1 EP 0513268 A1 EP0513268 A1 EP 0513268A1 EP 19910919885 EP19910919885 EP 19910919885 EP 91919885 A EP91919885 A EP 91919885A EP 0513268 A1 EP0513268 A1 EP 0513268A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
valve
valve body
relatively thin
bonnet
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Withdrawn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
EP19910919885
Other languages
German (de)
English (en)
Inventor
Robert Reginald Raikes
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.)
Crane Process Flow Technologies Ltd
Original Assignee
Saunders Valve Co 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 Saunders Valve Co Ltd filed Critical Saunders Valve Co Ltd
Publication of EP0513268A1 publication Critical patent/EP0513268A1/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Withdrawn legal-status Critical Current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
    • F16K41/00—Spindle sealings
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
    • F16K41/103—Spindle sealings with diaphragm, e.g. shaped as bellows or tube the diaphragm and the closure member being integrated in one member
    • 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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/126—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm the seat being formed on a rib perpendicular to the fluid line

Definitions

  • This invention relates to a diaphragm valve, that is to say a valve in which a closure diaphragm is secured to a valve body and is movable by an operating mechanism into engagement with a seat defined by the valve body in order to close the valve to fluid flow.
  • the diaphragm of a diaphragm valve has a peripheral zone of substantially uniform thickness which is compressed between the valve body and a bonnet assembly which is itself secured to the valve body by suitable means, for example fastening bolts.
  • suitable means for example fastening bolts.
  • the presence of the diaphragm between the body and the bonnet means that the body retaining fasteners cannot be tightened hard down. They should, ideally, be set to a specified torque, but accurate setting of the torque is not always carried out, especially when valve diaphragms are changed by service personnel not familiar with the torque requirements of the particular valve and diaphragm in question.
  • a diaphragm valve comprising: a valve body defining a diaphragm opening and a valve seat; a valve bonnet secured to the valve body; a diaphragm closing the diaphragm opening, the peripheral zone of the diaphragm being compressed between the valve body and the valve bonnet to maintain the diaphragm in sealing engagement with the valve body around the diaphragm opening; and an operating mechanism for moving the diaphragm into sealing engagement with the valve seat to close the valve to fluid flow and away from the valve seat to open the valve to fluid flow, wherein the peripheral zone of the diaphragm comprises a relatively thick radially inner portion and a relatively thin radially outer portion both of which are compressed between the valve body and the valve bonnet, at least one of the valve body and the valve bonnet being stepped to accommodate the changes in thickness of the diaphragm.
  • diaphragm valve With an embodiment of diaphragm valve according to the present invention only the relatively thin radially outer portion of the diaphragm is visible between the valve body and the bonnet, and because this portion can be made very thin the problems of aesthetic appearance and confidence referred to above are obviated. Further, if the tolerances of the various components are carefully controlled the fastenings which secure the valve bonnet to the valve body may be tightened hard to compress the relatively thin radially outer portion of the diaphragm, and when the fastenings are fully tightened in this manner the radially inner relatively thick portion of the diaphragm will be correctly compressed for proper working of the valve.
  • the relatively thin radially outer portion of the diaphragm comprises a relatively thin web of elastomeric material which is moulded with one or more raised beads to form a sealing bead in the region of the relatively thin portion of the diaphragm.
  • a sealing bead provides an effective secondary seal against leakage of line fluid between the valve bonnet and the body.
  • Figure 1 shows, in axial cross-section, a preferred embodiment of the invention
  • Figure 2 is a top plan view of the valve of Figure 1 ;
  • Figures 3 and 4 are respectively a top plan view and a bottom plan view of a diaphragm for use in the valve of Figure 1 ;
  • Figure 5 is a side view of the diaphragm of Figures 3 and 4;
  • Figure 6 is a cross-section on the line A-A of Figure 3.
  • Figure 7 is a cross-section on the line B-B of Figure 3.
  • the diaphragm valve 1 comprises a valve body 2 having a flow passage 3 and a diaphragm opening 4.
  • a valve bonnet 5 is secured to the valve body by means of threaded fasteners 6.
  • the peripheral zone 10 of a diaphragm 7 is compressed between the valve body 2 and the valve bonnet 5 to maintain the diaphragm in sealing engagement with the valve body around the diaphragm opening 4.
  • An operating mechanism 8 is provided for moving the diaphragm into sealing contact with a valve seat 9 provided on the valve body to close the valve to fluid flow.
  • the diaphragm 7 is a rubber moulding which may optionally incorporate reinforcing fabric.
  • the diaphragm may be of a composite nature, having for example a PTFE facing and an elastomeric rubber backing.
  • the peripheral zone 10 of the diaphragm which, in use, is compressed between the valve body and the valve bonnet comprises a relatively thick radially inner region 11 and a relatively thin radially outer region 12.
  • the thickness of the radially inner region 11 substantially corresponds to the thickness of the diaphragm over the regions thereof which flex in use.
  • Both the upper and lower faces of the relatively thin radially outer region 12 are formed with raised beads 13 having the form shown in the drawings. Each raised bead on the upper surface overlies a raised bead formed on the lower surface with the result that the raised beads together form thickened regions of the relatively thin radially outer portion similar in nature to 0-ring seals.
  • the lower face of the bonnet 5 is formed with a step 14 to accommodate the change of thickness of the diaphragm.
  • the operating mechanism 8 is of the rising handwheel type - that is to say as the handwheel is rotated to move the diaphragm from its closed position in engagement with the seat 9 towards it fully open position, the handwheel itself moves away from the body to expose progressively more of an indicator sleeve 15 provided for the purpose of giving a visual indication that the valve is open.
  • the fasteners 6 may be tightened fully home to compress the relatively thin radially outer portion 12 of the diaphragm between the bonnet 5 and the valve body 2. If the fasteners 6 are fully tightened the size of the step 14 is such that the relatively thick radially inner portion of the diaphragm will be correctly compressed between the valve body 2 and the bonnet 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Navigation (AREA)
  • Traffic Control Systems (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

Un robinet à membrane (1) comprend: un corps de robinet (2) qui définit une ouverture à membrane (4) et un siège (9); un chapeau (5) fixé au corps du robinet; une membrane (7) qui referme l'ouverture à membrane, la zone périphérique (10) de la membrane étant comprimée entre le corps et le chapeau du robinet pour ainsi maintenir la membrane en contact hermétique avec le siège afin d'arrêter l'écoulement de liquide à travers le robinet et pour écarter la membrane du siège afin de permettre l'écoulement de liquide. La zone périphérique de la membrane comprend une partie intérieure (11) relativement épaisse dans le sens radial et une partie extérieure (12) relativement mince dans le sens radial, les deux parties étant comprimées entre le chapeau et le corps du robinet. Au moins le corps ou le chapeau est à gradins pour permettre l'adaptation aux variations d'épaisseur de la membrane.
EP19910919885 1990-11-23 1991-11-11 Robinet a membrane Withdrawn EP0513268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9025531A GB2250081A (en) 1990-11-23 1990-11-23 Diaphragm valve
GB9025531 1990-11-23

Publications (1)

Publication Number Publication Date
EP0513268A1 true EP0513268A1 (fr) 1992-11-19

Family

ID=10685894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910919885 Withdrawn EP0513268A1 (fr) 1990-11-23 1991-11-11 Robinet a membrane

Country Status (4)

Country Link
EP (1) EP0513268A1 (fr)
JP (1) JPH05501001A (fr)
GB (1) GB2250081A (fr)
WO (1) WO1992009835A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302556A1 (de) * 1993-01-29 1994-08-04 Mueller Apparatebau Gmbh & Co Membranventil mit Schließhubbegrenzung
DE19738572A1 (de) * 1997-09-04 1999-03-25 Fastje Ines Dosierventil, insbesondere für ein Druckstrahlgerät, Druckstrahlgerät sowie Verfahren zum Betrieb eines Druckstrahlgeräts
GB2399616A (en) * 2003-03-19 2004-09-22 Crane Process Flow Technologie Diaphragm valves and diaphragms therefor
CN117897571A (zh) * 2021-09-04 2024-04-16 图沙尔·贾殷 流体控制阀
JP7128379B1 (ja) * 2022-05-16 2022-08-30 日本ダイヤバルブ株式会社 ダイヤフラム及びダイヤフラム弁

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918089A (en) * 1955-11-03 1959-12-22 Hills Mccanna Co Diaphragm assembly
GB955411A (en) * 1959-02-25 1964-04-15 Saunders Valve Co Ltd Improvements in and relating to valves for the control of fluids
US3075740A (en) * 1960-06-02 1963-01-29 Dow Chemical Co Diaphragm valve
DE2429448A1 (de) * 1974-06-19 1976-01-15 Beukert Elektro Christian Membranabgedichtetes ventil
US4339111A (en) * 1980-05-13 1982-07-13 Superior Stainless, Inc. Clean in place diaphragm valve
DE8613806U1 (de) * 1986-05-22 1986-09-18 Schluff, Reinhold, Dipl.-Ing., 2304 Laboe Absperrorgan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9209835A1 *

Also Published As

Publication number Publication date
JPH05501001A (ja) 1993-02-25
GB9025531D0 (en) 1991-01-09
WO1992009835A1 (fr) 1992-06-11
GB2250081A (en) 1992-05-27

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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: 19920710

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19940107

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: 19940518