Pilot-controlled safety valve

Details Pilot-controlled safety valve Pilot-controlled safety valve

1983-08-16

1985-06-11

Nilson, Robert G.

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

137492, 137528, F16K 31126

Patent

active

045223696

ABSTRACT:
A safety valve for walls and other vessels and adapted to vent the vessel to the atmosphere upon the development of a predetermined maximum pressure in the vessel comprises a step plunger carrying a valve member and adapted to displace the valve member toward and away from a seat in a valve housing in which a command chamber is defined between an axial guide for the plunger and an end thereof. The command chamber is controlled by the pressure from the pilot device and the blocks surrounding this axial guide and is connected to the plunger so that the sealing is effected by the bellows and the guide does not need to have a sealing capability.

REFERENCES:
patent: 2679259 (1954-05-01), Haeberlein
patent: 4200116 (1980-04-01), Gemignani

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