GB663333A - Improvements in or relating to safety valves - Google Patents

Improvements in or relating to safety valves

Info

Publication number
GB663333A
GB663333A GB2326349A GB2326349A GB663333A GB 663333 A GB663333 A GB 663333A GB 2326349 A GB2326349 A GB 2326349A GB 2326349 A GB2326349 A GB 2326349A GB 663333 A GB663333 A GB 663333A
Authority
GB
United Kingdom
Prior art keywords
seat
valve
flange
seat member
contact
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
Application number
GB2326349A
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.)
Manning Maxwell and Moore Inc
Original Assignee
Manning Maxwell and Moore Inc
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 Manning Maxwell and Moore Inc filed Critical Manning Maxwell and Moore Inc
Priority to GB2326349A priority Critical patent/GB663333A/en
Publication of GB663333A publication Critical patent/GB663333A/en
Expired 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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid

Abstract

663,333. Safety valves. DEWRANCE & CO., Ltd. (Manning, Maxwell & Moore). Sept. 8, 1949, No. 23263/49. Class 135. To prevent leakage and the pitting and distortion of the contact surfaces in a safety valve having a movable valve member biassed into contact with its seat member, the contact surface on at least one of the members is provided on one side of a thin flange element formed on or affixed to the member, the other side of the element being exposed to fluid pressure, whilst the contact surfaces are made of like or unlike materials having a low coefficient of expansion and freedom from welding together. A spring-loaded, boiler safety valve 3, Fig 1, operable at high pressures, e.g. 1,500 p.s.i. and having a movable valve member 7 screw-threadedly mounted in a surrounding skirt 8 and co-operating with a seat member 4, is formed with a thin annular flange 18, Fig. 2, the tip 19 of which contacts the seat member. The skirt 8 is slidably guided in a member 9 secured between the valve casing 2 and its bonnet 12 whilst the seat 4 is surrounded by a removable blow-down ring 6. When the valve is closed, steam pressure acting on the upper surface of the flange 18 assists closure and, due to its flexibility and thinness, tends to increase the contact area between the valve and its seat and rapidly dissipates any heat to prevent local cooling and distortion and hence leakage. In a modification, the seat member 4, Fig. 5, is also provided with a thin annular flange 25. In another arrangement, the undersurface of the valve member flange is made plane instead of conical and cooperates with a plane seat surface. The contact surfaces are of like or unlike materials selected from 13 per cent chromium steel, nitriding steels, cupronickel alloys and the Registered Trade Mark materials Invar and Stellite. A deposit of chromium on the seat member may also be used.
GB2326349A 1949-09-08 1949-09-08 Improvements in or relating to safety valves Expired GB663333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2326349A GB663333A (en) 1949-09-08 1949-09-08 Improvements in or relating to safety valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2326349A GB663333A (en) 1949-09-08 1949-09-08 Improvements in or relating to safety valves

Publications (1)

Publication Number Publication Date
GB663333A true GB663333A (en) 1951-12-19

Family

ID=10192823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2326349A Expired GB663333A (en) 1949-09-08 1949-09-08 Improvements in or relating to safety valves

Country Status (1)

Country Link
GB (1) GB663333A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124821A1 (en) * 1983-05-09 1984-11-14 Siemens Aktiengesellschaft Valve having a conical seat
DE4034531C1 (en) * 1990-10-30 1992-03-05 Siemens Ag, 8000 Muenchen, De
GB2343498A (en) * 1998-11-03 2000-05-10 Seetru Ltd Safety valve with shape-recoverable sealing element
WO2020023226A1 (en) * 2018-07-23 2020-01-30 Emerson Vulcan Holding Llc Valve disc assemblies for fluid valves having soft seats

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124821A1 (en) * 1983-05-09 1984-11-14 Siemens Aktiengesellschaft Valve having a conical seat
DE4034531C1 (en) * 1990-10-30 1992-03-05 Siemens Ag, 8000 Muenchen, De
GB2343498A (en) * 1998-11-03 2000-05-10 Seetru Ltd Safety valve with shape-recoverable sealing element
WO2020023226A1 (en) * 2018-07-23 2020-01-30 Emerson Vulcan Holding Llc Valve disc assemblies for fluid valves having soft seats
US10823293B2 (en) 2018-07-23 2020-11-03 Emerson Vulcan Holding Llc Valve disc assemblies for fluid valves having soft seats

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