Electropneumatic pressure relief indicator

Details Electropneumatic pressure relief indicator Electropneumatic pressure relief indicator

1979-01-08

1981-04-28

Rosenthal, Arnold

Fluid handling

Destructible or deformable element controlled

Destructible element

220 89A, 340626, 137557, F16K 1740

Patent

active

042639298

ABSTRACT:
A pressure relief indicator including a housing connected in fluid communication with a fluid system to be relieved, a pair of rupturable diaphragms extending in closing relation across the housing and combining to define a closed chamber, the diaphragm adjacent to the system rupturing at a predetermined desired relief pressure and the other diaphragm rupturing at a lesser pressure, a pressure supply maintaining a control pressure in the chamber of a value between atmospheric pressure and the lesser diaphragm rupturing pressure, and an annunciator responsive to change in pressure differential between the chamber and atmosphere as upon rupture of the diaphragms.

REFERENCES:
patent: 2571961 (1951-10-01), Smith
patent: 2788794 (1957-04-01), Holinger
patent: 2895492 (1959-07-01), Bell
patent: 2947443 (1960-08-01), Sawyer et al.
patent: 3304546 (1967-02-01), Kern et al.

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