Line relay valve

Details Line relay valve Line relay valve

1976-05-14

1977-08-09

Cline, William R.

Pumps

Alternate series or parallel operation of plural pumps

137566, 137567, E03B 500

Patent

active

040407713

ABSTRACT:
A line relay valve has a valve body with a straight trunk which connects a movable pump to a fire extinguishing nozzle. When the hose lay is several thousand feet, causing severe pressure loss, a first angular branch of the trunk, with a gate valve, is connected to the influent side of a movable booster pump. A second angular branch is connected to the effluent side of the booster pump. Upon opening the gate valve, a clapper swings from first branch blocking position to trunk blocking position to interpose the booster into the system without air intake or water interruption.

REFERENCES:
patent: 1049894 (1913-01-01), Merrill
patent: 1523342 (1925-01-01), Hart
patent: 2134409 (1938-10-01), Kirgan
patent: 2265650 (1941-12-01), Lannert
patent: 3073453 (1963-01-01), Canetta et al.
patent: 3801224 (1974-04-01), Eberhardt

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