AIR OPERATED VALVE WITH PILOT SOLENOID VALVE Russian patent published in 2012 - IPC F16K31/42 

FIELD: machine building.

SUBSTANCE: proposed valve comprises body with seat, shut-off element, inlet and outlet branch pipes, check valve, drain and fill system. Valve is furnished with cover. Valve body accommodates shut-off cylindrical gate with diameter varying in stepwise manner along the length of its generating line to make control spaces together with body and cover. Through channel is bored in gate body to communicate inlet branch pipe with space formed by cover and gate "П"-shape stem, and as well as channel to communicate outlet branch pipe with drain line. Check valve is arranged is arranged at valve center along gate axis. Check valve spring-loaded piston rod thrusts upon lever arranged in the channel horizontal section. Channel are made in valve body and cover to communicate via lines and controlled solenoid pilot valve with filling gate and drain system.

EFFECT: reduced hydraulic shock, expanded operating performances, optimised design.

1 dwg