GB376991A - Improvements in safety valves - Google Patents

Improvements in safety valves

Info

Publication number
GB376991A
GB376991A GB23761/31A GB2376131A GB376991A GB 376991 A GB376991 A GB 376991A GB 23761/31 A GB23761/31 A GB 23761/31A GB 2376131 A GB2376131 A GB 2376131A GB 376991 A GB376991 A GB 376991A
Authority
GB
United Kingdom
Prior art keywords
valve
cover
orifice
spindle
chamber
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
GB23761/31A
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.)
CONS ASHCROFT HANCOCK CO
Original Assignee
CONS ASHCROFT HANCOCK CO
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 CONS ASHCROFT HANCOCK CO filed Critical CONS ASHCROFT HANCOCK CO
Publication of GB376991A publication Critical patent/GB376991A/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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

376,991. Safety valves. CONSOLIDATED ASHCROFT HANCOCK CO., Elias Street, Bridgeport, Connecticut, U.S.A. -(Assignees of Eplett, A. D. ; Elias Street, Bridgeport, Connecticut, U.S.A.). Aug. 24, 1931, No. 23761. Convention date, March 19. [Class 135.] A safety valve has a valve member with a tubular extension which forms part of a back pressure chamber, an orifice in the cover of which is provided with closing means which operate as the valve returns to its seat. A seating surface 4 is provided on a bushing 5 screwed into the inlet 2. The tubular extension 13a of the valve member 13 is guided in a cylindrical sleeve 8, integral ring projections 8a, 8b on which bear against an annular portion 1a of the casing 1. A spindle 12 which rests at its lower end in a cavity in the valve members 13, to which the movement of the spindle is transmitted by a pin 15, passes with some clearance through a nut 14 screwed into the cover of the portion 13a and thence through an orifice 11 in a loose annulus 10a confined by a screw-threaded ring 10b in a recess in the integral cover 10 of the guiding sleeve 8. A blow-down ring 23 screwed to the bushing 5 has a conical inside surface 24 which forms with a corresponding surface 25 on the portion 13a, one part of a huddling chamber 22, the other part of which is formed by the overhang 21 of the valve member 13, and the top of the bushing 5. A passage (or passages) 26 leads from the huddling chamber 22 to a back pressure chamber comprising the interior of the extension 13a and an upper chamber 9 between the cover 10 and the cover of the extension 13a. In the closed position of the valve, a cylindrical enlargement 28 on the spindle 12 closes the orifice 11 but in the full open position, a shoulder 27 on said enlargement occupies the orifice 11 and pressure fluid can escape through the passage then available, said passage being constricted and pressure built up in the back pressure chamber when the valve commences to return to its seat. The lower abutment 18 of a spring 19 engages a shoulder 16 on the spindle 12. The upper abutment 20 is adjusted by an externally threaded sleeve 20a held in the yoke 7.
GB23761/31A 1931-03-19 1931-08-24 Improvements in safety valves Expired GB376991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US376991XA 1931-03-19 1931-03-19

Publications (1)

Publication Number Publication Date
GB376991A true GB376991A (en) 1932-07-21

Family

ID=21895797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23761/31A Expired GB376991A (en) 1931-03-19 1931-08-24 Improvements in safety valves

Country Status (1)

Country Link
GB (1) GB376991A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114263771A (en) * 2021-12-08 2022-04-01 北京航天石化技术装备工程有限公司 Back pressure cavity for high-performance steam safety valve
CN116658674A (en) * 2023-08-01 2023-08-29 博莱阀门（常州）有限公司 Automatic control valve based on data analysis and automatic control method thereof
CN117345888A (en) * 2023-12-04 2024-01-05 福建云联中汇环保科技有限公司 Sewage air valve capable of preventing leakage of sewage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114263771A (en) * 2021-12-08 2022-04-01 北京航天石化技术装备工程有限公司 Back pressure cavity for high-performance steam safety valve
CN116658674A (en) * 2023-08-01 2023-08-29 博莱阀门（常州）有限公司 Automatic control valve based on data analysis and automatic control method thereof
CN117345888A (en) * 2023-12-04 2024-01-05 福建云联中汇环保科技有限公司 Sewage air valve capable of preventing leakage of sewage
CN117345888B (en) * 2023-12-04 2024-04-12 福建云联中汇环保科技有限公司 Sewage air valve capable of preventing leakage of sewage

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