Surge protection valve

Details Surge protection valve Surge protection valve

1979-02-23

1980-04-01

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

13751215, 137521, F16K 1700

Patent

active

041956575

ABSTRACT:
A damper valve is disclosed having a hollow body and two valve plates controlled by a velocity sensitive linkage allowing the passage of normal system velocity, but closing when the velocity exceeds normal flow rates as would occur with an air surge caused by a tornado. The mechanism is made up of a three bar trip linkage connected to the valve plate in such manner so that when the linkage roller arm is held in the lower position by the cam seat, the valve plates (damper blades) are held in open position.

REFERENCES:
patent: 2800920 (1957-07-01), Smith
patent: 2998080 (1959-08-01), Smith
patent: 3047012 (1962-07-01), Smith

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