JPS57127170A - Safety shut-off valve - Google Patents

Safety shut-off valve

Info

Publication number
JPS57127170A
JPS57127170A JP1125281A JP1125281A JPS57127170A JP S57127170 A JPS57127170 A JP S57127170A JP 1125281 A JP1125281 A JP 1125281A JP 1125281 A JP1125281 A JP 1125281A JP S57127170 A JPS57127170 A JP S57127170A
Authority
JP
Japan
Prior art keywords
signal
fixed time
valve
driving signal
test valve
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.)
Granted
Application number
JP1125281A
Other languages
Japanese (ja)
Other versions
JPS6129434B2 (en
Inventor
Eiichi Morozumi
Kazuyoshi Tanaka
Tadashi Kojima
Kentaro Inoue
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.)
Azbil Corp
Original Assignee
Azbil Corp
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 Azbil Corp filed Critical Azbil Corp
Priority to JP1125281A priority Critical patent/JPS57127170A/en
Publication of JPS57127170A publication Critical patent/JPS57127170A/en
Publication of JPS6129434B2 publication Critical patent/JPS6129434B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)

Abstract

PURPOSE:To enable to reset only in case of no gas leakage at secondary side by a method wherein a control circuit, which opens a test valve for the fixed time, is provided. CONSTITUTION:When the shut-off signal is supplied, the supply of the driving signal to a coil 23 is interrupted and the pressure within a chamber 25 becomes low and a valve body 14 and a responding body 28 returns to their original positions to close the opening of a port 13. When the reset signal is supplied, the control circuit 4 supplies the driving signal to the test valve 6 only for the fixed time in order to open the test valve 6. Consequently, the gas within an inlet passage 11 flows through a by path 5 to an outlet passage 12. If there is no gas leakage at the side of the passage 12, the gas flow stops after a short time, resulting in stopping an impeller 31. The circuit 4 checks pulse from a Hall element 33 after the fixed time and, when no pulse signal is sent, sends the driving signal to the coil 23.
JP1125281A 1981-01-28 1981-01-28 Safety shut-off valve Granted JPS57127170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1125281A JPS57127170A (en) 1981-01-28 1981-01-28 Safety shut-off valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1125281A JPS57127170A (en) 1981-01-28 1981-01-28 Safety shut-off valve

Publications (2)

Publication Number Publication Date
JPS57127170A true JPS57127170A (en) 1982-08-07
JPS6129434B2 JPS6129434B2 (en) 1986-07-07

Family

ID=11772742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1125281A Granted JPS57127170A (en) 1981-01-28 1981-01-28 Safety shut-off valve

Country Status (1)

Country Link
JP (1) JPS57127170A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126206U (en) * 1981-01-31 1982-08-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126206U (en) * 1981-01-31 1982-08-06

Also Published As

Publication number Publication date
JPS6129434B2 (en) 1986-07-07

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