MEMBRANE CONTROL VALVE WITH UNIVERSAL INSTALLATION SEAT FOR MEMBRANE Russian patent published in 2016 - IPC F16K31/126 

FIELD: machine building.

SUBSTANCE: membrane control valve comprises a cover to be attached to the valve body having a mounting flange and a mounting surface. Valve body has an inlet for a fluid medium, an outlet for the fluid medium and a flow channel comprising an inlet channel, an outlet channel and a control channel located between the inlet and the outlet channels. Valve body additionally comprises a mounting part with a mounting surface of the body located near the mounting flange of the cover. Herewith the mounting surface of the body faces the mounting surface of the cover. Membrane is located in the control channel. Herewith part of the membrane is squeezed between the mounting surface of the cover and the mounting surface of the body. Pressing washer comprises a body and is located between the membrane and the mounting surface of the cover. Mounting surface of the cover changes into the first circular retaining surface formed by a skirt. And the mounting surface of the body changes into the second circular retaining surface, which is formed by a lifted collar. Herewith the skirt passes over part of the valve body. Between the lifted collar and the skirt there is a gap formed, due to which the whole said lifted collar is arranged at a distance from the cover.

EFFECT: invention is aimed at increasing reliability and accuracy of the control valve.

22 cl, 4 dwg