Check valve actuator with adjustable seat for air chamber seal

Details Check valve actuator with adjustable seat for air chamber seal Check valve actuator with adjustable seat for air chamber seal

1999-01-29

2000-12-12

Kashnikow, Andres

Fire extinguishers

Fluid systems

Distributing systems

169 22, A62C 3500, A62C 3708

Patent

active

061585203

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 vent outlet for the pressurized air within the actuator. The seal for the vent outlet may be manually adjustable to compensate for manufacturing tolerances. 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), Simmons 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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