Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1981-06-03
1983-05-24
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137492, F16K 1710
Patent
active
043845908
ABSTRACT:
A pressure responsive pilot valve for a pressure relief valve of the type held closed by system pressure applied to a dome over the valve member. The pilot valve has an inlet port exposed to system pressure, an exhaust port and a control port connected to the dome. Below a set system pressure, the pilot valve interconnects the inlet and control ports to pressurize the dome. At the set pressure, the pilot valve interconnects the control and exhaust ports. The set pressure is adjustable by a sleeve threaded in the body and the blowdown is adjustable by a stem extending through the sleeve.
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patent: 3664362 (1972-05-01), Weise
patent: 3726301 (1973-04-01), Schmidt
Crosby Valve & Gage Company
Nilson Robert G.
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