AIR PRESSURE CONTROL VALVE Russian patent published in 2020 - IPC F15B13/42 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to pneumatic automatics. Cylinder for distributor piston is made directly as element of central part of housing. Inner surface of cylinder is profiled, consisting of alternating cylindrical surfaces of larger and smaller diameters, mainly not more than two, conjugated to each other by means of conical surfaces in form of diffusers and confusers. Inlet, outlet and drain cavities of working medium open in cavities formed by cylindrical surfaces of larger diameter of inner part of air control valve body. Surface of stock is made profiled, containing cylindrical sections, conjugated by means of profiled sections in form of coils containing conical and cylindrical surfaces, conjugated to each other. Sealing elements of the profiled stock are installed in close proximity to the places of transition of cylindrical surfaces of the stock into the conical surfaces of the said coils.

EFFECT: invention can be used to control supply of working fluid to actuating servo-mechanisms in pneumatic actuators of various machines.

1 cl, 3 dwg