Relay valve

Details Relay valve Relay valve

F - Mech Eng,Light,Heat,Weapons

15

B

251/13

F15B 13/042 (2006.01) F16K 11/10 (2006.01) F16K 31/122 (2006.01)

Patent

CA 1252448

RELAY VALVE Abstract of the Disclosure A gas-actuated relay valve having an outlet port alternately connectable through opposed inlet and exhaust valve seats to inlet and exhaust ports, a lower downwardly opening valve head spring-urged for normally closing the seat to the inlet port, an upper upwardly opening normally in- seated valve head for closing the seat to the exhaust port, and coaxial inner and floating outer pistons respectively connected to the lower valve head and mounting the upper valve head, the outer piston presenting a larger area than the inner piston to actuating gas received in a common actuating gas chamber for preventing loss through the exhaust port of operating gas introduced through the inlet port by closing the upper exhaust valve seat before opening of the inlet valve seat.

477483

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