Hydraulically balanced remote controlled emergency valve for sto

Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator

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Details

251 635, 251144, F16K 31122

Patent

active

040098621

ABSTRACT:
A remotely controlled fluid pressure actuated internal emergency valve for the outlet opening of a liquid storage tank, for automatically closing the outlet port in the valve in the event of various emergency situations, and which also is adapted for bottom liquid loading or filling of the tank. The valve embodies means hydraulically balancing the movable housing of the valve, whereby the associated biasing means for the valve is effective to move the valve housing to closed position during bottom loading of the tank upon predetermined exhaustion of actuating fluid from the actuating pressure chamber of the valve. The valve is relatively simple in construction and highly effective in operation.

REFERENCES:
patent: 2049997 (1936-08-01), Eaton
patent: 2319392 (1943-05-01), Dick
patent: 2361225 (1944-10-01), Meyer
patent: 2436612 (1948-02-01), Sheets
patent: 2442625 (1948-06-01), Thomas
patent: 2726840 (1955-12-01), Jurs et al.
patent: 3065949 (1962-11-01), DeFrees
patent: 3257093 (1966-06-01), DeFrees
patent: 3392956 (1968-07-01), DeFrees
patent: 3397893 (1968-08-01), Kampert

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