Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
1985-04-11
1987-06-02
Schwadron, Martin P.
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
137489, F16K 1714
Patent
active
046694935
ABSTRACT:
A safety relief valve for liquified gas containers has dual pilot valves, one set to a given operating pressure and one adjustable. A main valve is responsive to the pilots, which are connected in parallel. The adjustable pilot is continuously adjustable and may be set below the operating pressure of the set pilot. The main valve has an inlet at the tank wall and a valve seat with a lateral outlet downstream thereof. The piston is faced at the inlet side by the gas pressure in the tank and on the control-pressure space side with a closing pressure adjusted by the pilots. If a given pressure in the tank is exceeded, the piston lifts from its valve seat, so that gas can flow from the inlet to the outlet. The second pilot valve can be provided with a thermal or other enabling means to initiate its operation when desired.
REFERENCES:
patent: 2592043 (1952-04-01), Larson et al.
patent: 3583432 (1971-06-01), Powell et al.
patent: 3811471 (1974-04-01), Murase et al.
patent: 4099538 (1978-07-01), Curtis
patent: 4328672 (1982-05-01), Zumstein
Kober Drago
Martin Erich
Cryogas GmbH
Novack Sheri M.
Schwadron Martin P.
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