Method and apparatus for testing the setting of a valve

Details Method and apparatus for testing the setting of a valve Method and apparatus for testing the setting of a valve

1979-07-20

1981-03-17

Yasich, Daniel M.

Measuring and testing

Blower, pump, and hydraulic equipment

73 9, 73 498, 116277, 137551, F16K 3700, G01M 1300

Patent

active

042559677

ABSTRACT:
A method and apparatus for testing the setting of a valve (particularly a safety valve mounted on a vessel) comprising a valve member biassed towards a valve seat, employs a pulling device which is engaged with the valve member and operated to apply a tractive force opposed to the bias which is just sufficient to separate the valve member from the valve seat. The pulling device is preferably operated by a hydraulic or pneumatic pump. The hydraulic or pneumatic pressure which is just sufficient to separate the valve member from the valve seat is indicated by a suitable gauge and is proportional to the tractive force. The sum of the tractive force and the force acting on the valve from inside the vessel and which can be calculated from the internal pressure indicated on a pressure gauge communicating with the interior of the vessel is indicative of the setting of the valve. The separation of the valve member from the valve seat is conveniently indicated by bubbles in a layer of liquid overlying the valve member.

REFERENCES:
patent: 1571958 (1926-02-01), Mueller et al.
patent: 2178901 (1939-11-01), Webster
patent: 2264515 (1941-12-01), Fear
patent: 2691773 (1954-10-01), Lichtenberger
patent: 2934943 (1960-05-01), Carrie
patent: 2959050 (1960-10-01), Franch
patent: 3344807 (1967-10-01), Lehrer et al.
patent: 3857282 (1974-12-01), Doorley et al.
patent: 4029122 (1977-06-01), Jaegtnes
patent: 4181017 (1980-01-01), Markle

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