JPS57171170A - Check valve - Google Patents

Check valve

Info

Publication number
JPS57171170A
JPS57171170A JP5555481A JP5555481A JPS57171170A JP S57171170 A JPS57171170 A JP S57171170A JP 5555481 A JP5555481 A JP 5555481A JP 5555481 A JP5555481 A JP 5555481A JP S57171170 A JPS57171170 A JP S57171170A
Authority
JP
Japan
Prior art keywords
spring
sheet plates
valve
sheet
circulated
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.)
Pending
Application number
JP5555481A
Other languages
Japanese (ja)
Inventor
Ryoji Sumita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5555481A priority Critical patent/JPS57171170A/en
Publication of JPS57171170A publication Critical patent/JPS57171170A/en
Pending 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F16K15/035—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member with a plurality of valve members
    • F16K15/036—Dual valve members with hinges crossing the flow line substantially diametrical
    • F16K15/038—Dual valve members with hinges crossing the flow line substantially diametrical having a common hinge

Abstract

PURPOSE:To both widely miniaturize a valve with simple constuction and reduce its cost, by equipping a spring, always urging sheet plates, opening and closing a circulation port, to a closing direction, and a mechanism, limiting a maximum opening of the sheet plate. CONSTITUTION:Since pressures before and after a check valve are equal with fluid is not circulated, sheet plates 5a, 5b are closely attached to a valve main body 1 by tightening force of a spring 6 to close circulating ports 1a. If pressure fluid is circulated from the lower side to the upper side through the circulating ports 1a, the sheet plates 5a, 5b are opened to a position for force by the pressure fluid to be balanced to repulsive force of the spring 6. However, a maximum opening of said sheet plates 5a, 5b is suppressed by an upper shaft 4 to a position of about 90 deg. for the valve main body 1.
JP5555481A 1981-04-15 1981-04-15 Check valve Pending JPS57171170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5555481A JPS57171170A (en) 1981-04-15 1981-04-15 Check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5555481A JPS57171170A (en) 1981-04-15 1981-04-15 Check valve

Publications (1)

Publication Number Publication Date
JPS57171170A true JPS57171170A (en) 1982-10-21

Family

ID=13001912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5555481A Pending JPS57171170A (en) 1981-04-15 1981-04-15 Check valve

Country Status (1)

Country Link
JP (1) JPS57171170A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977926A (en) * 1988-09-21 1990-12-18 Stockham Valve Australia Pty. Ltd. Check valve
US7311740B2 (en) 2005-02-14 2007-12-25 Honeywell International, Inc. Snap acting split flapper valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977926A (en) * 1988-09-21 1990-12-18 Stockham Valve Australia Pty. Ltd. Check valve
US7311740B2 (en) 2005-02-14 2007-12-25 Honeywell International, Inc. Snap acting split flapper valve

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