Lockout valve

Details Lockout valve Lockout valve

F - Mech Eng,Light,Heat,Weapons

15

B

138/87.1

F15B 13/01 (2006.01) F15B 13/04 (2006.01)

Patent

CA 1261233

ABSTRACT OF THE DISCLOSURE The invention is a lockout valve used in a hydraulic circuit to prevent leakage in a static condition; the lockout valve does not require outside force to hold the lockout open once flow across the lockout is established due to the positioning of an orifice ring around the poppet upstream of the poppet seat with the closing area acting on the poppet in conjunction with a spring which senses the pressure downstream of the orifice ring so that when there is sufficient flow across the orifice ring, the force created by the opening area on the poppet, which is located upstream of the orifice ring, will exceed the combined force of the spring and the closing area so that the lockout valve will remain open without an outside force so long as sufficient flow is maintained across the poppet.

505866

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