JPS57149934A - Liquid isolation device provided at halfway point of instrument piping - Google Patents

Liquid isolation device provided at halfway point of instrument piping

Info

Publication number
JPS57149934A
JPS57149934A JP3535681A JP3535681A JPS57149934A JP S57149934 A JPS57149934 A JP S57149934A JP 3535681 A JP3535681 A JP 3535681A JP 3535681 A JP3535681 A JP 3535681A JP S57149934 A JPS57149934 A JP S57149934A
Authority
JP
Japan
Prior art keywords
liquid
sea water
instrument
liquid isolation
isolation device
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
JP3535681A
Other languages
Japanese (ja)
Inventor
Sumio Iwashima
Shozo Sato
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 JP3535681A priority Critical patent/JPS57149934A/en
Publication of JPS57149934A publication Critical patent/JPS57149934A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0627—Protection against aggressive medium in general
    • G01L19/0645—Protection against aggressive medium in general using isolation membranes, specially adapted for protection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To obtain sufficient anticorrosive effect with simple structure by sectioning the inside of a device into two chambers, and providing a measuring liquid injection intake and an air vent. CONSTITUTION:An instrument pipe 2 is branched from a sea water system pipe 1, and a pressure gauge 4 is connected through an instrument initial valve 3 and a liquid isolation device 6. In the device 6, a liquid isolation plate 8 separating a measured-liquid (sea water) chamber and a measuring-liquid (fresh water) chamber is capable of sliding on the internal wall of a main device body 7, and a fresh water injection intake 11 and an air vent 12 for internal air for the introduction of sea water are provided. Therefore, the pressure of the sea water is transferred to the fresh water as it is and the pressure of the sea water in a main pipe 1 is measured by an instrument 4.
JP3535681A 1981-03-13 1981-03-13 Liquid isolation device provided at halfway point of instrument piping Pending JPS57149934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3535681A JPS57149934A (en) 1981-03-13 1981-03-13 Liquid isolation device provided at halfway point of instrument piping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3535681A JPS57149934A (en) 1981-03-13 1981-03-13 Liquid isolation device provided at halfway point of instrument piping

Publications (1)

Publication Number Publication Date
JPS57149934A true JPS57149934A (en) 1982-09-16

Family

ID=12439593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3535681A Pending JPS57149934A (en) 1981-03-13 1981-03-13 Liquid isolation device provided at halfway point of instrument piping

Country Status (1)

Country Link
JP (1) JPS57149934A (en)

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