Actuator for check valve

Details Actuator for check valve Actuator for check valve

1998-05-18

2000-02-29

Kashnikow, Andres

Fire extinguishers

Fluid systems

Distributing systems

169 22, A62C 3500, A62C 3708

Patent

active

060297492

ABSTRACT:
An actuator is provided for a check valve, having particular utility in a dry fire control system. The check valve is responsive to a drop in the system air pressure occasioned by opening of one or more sprinkler heads in the fire control system. The movement of the actuator to its open position, establishes a water drain line therethrough, while advantageously also opening a previously sealed outlet for the pressurized air within the actuator. The actuator may respond to either the magnitude of system air pressure drop, or the rate of system air pressure drop.

REFERENCES:
patent: 1861777 (1932-06-01), Benson
patent: 3785440 (1974-01-01), Shea
patent: 4105076 (1978-08-01), Simons et al.
patent: 4286668 (1981-09-01), McCormick
patent: 4615353 (1986-10-01), McKee
patent: 4854342 (1989-08-01), Polan
patent: 5294090 (1994-03-01), Winnike

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