JPS57146972A - Disc opening detecting mechanism of testable check valve - Google Patents

Disc opening detecting mechanism of testable check valve

Info

Publication number
JPS57146972A
JPS57146972A JP2988281A JP2988281A JPS57146972A JP S57146972 A JPS57146972 A JP S57146972A JP 2988281 A JP2988281 A JP 2988281A JP 2988281 A JP2988281 A JP 2988281A JP S57146972 A JPS57146972 A JP S57146972A
Authority
JP
Japan
Prior art keywords
disc
detecting
opening
check valve
detecting mechanism
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
JP2988281A
Other languages
Japanese (ja)
Inventor
Kikuo Takeshima
Seiichi Takahashi
Takayoshi Jitsumatsu
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 JP2988281A priority Critical patent/JPS57146972A/en
Publication of JPS57146972A publication Critical patent/JPS57146972A/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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

PURPOSE:To provide a detecting mechanism which can confirm whether a disc is fully opened, totally closed or intermediately opened by detecting the opening and closing of a disc by connecting a first detecting switch and a second detecting switch to an indication lamp A and an indication lamp B respectively. CONSTITUTION:When a disc 6 is totally closed, a first and a second detecting switches 17a, 17b are open circuit. While the disc 6 starts opening up to full opening, the second detecting switch 17b is closed circuit, and the first detecting switch 17a is open circuit. When the disc is fully opened, the first and the second detecting switches 17a, 17b are closed circuit. Therefore, when the disc 6 is totally closed, both indication lamps A, B are not lighted. In case of middle opening, only the indication lamp B is lighted, and when the disc is fully opened, both indication lamps A, B are lighted. Thus, an operator can confirm a middle opening of the disc 6 as well as the total closing and the full opening of the disc 6.
JP2988281A 1981-03-04 1981-03-04 Disc opening detecting mechanism of testable check valve Pending JPS57146972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2988281A JPS57146972A (en) 1981-03-04 1981-03-04 Disc opening detecting mechanism of testable check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2988281A JPS57146972A (en) 1981-03-04 1981-03-04 Disc opening detecting mechanism of testable check valve

Publications (1)

Publication Number Publication Date
JPS57146972A true JPS57146972A (en) 1982-09-10

Family

ID=12288337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2988281A Pending JPS57146972A (en) 1981-03-04 1981-03-04 Disc opening detecting mechanism of testable check valve

Country Status (1)

Country Link
JP (1) JPS57146972A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61502778A (en) * 1984-07-18 1986-11-27 マギ−・アンソニ−・ジエ−ムス Water supply valve changing method and device
KR100336397B1 (en) * 2000-04-06 2002-05-10 석진철 Valve lift display for motorized valve actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61502778A (en) * 1984-07-18 1986-11-27 マギ−・アンソニ−・ジエ−ムス Water supply valve changing method and device
JPH0564276B2 (en) * 1984-07-18 1993-09-14 Anthony James Magee
KR100336397B1 (en) * 2000-04-06 2002-05-10 석진철 Valve lift display for motorized valve actuator

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