FIELD: gas-flow control. SUBSTANCE: electromagnetic valve has body, spring-loaded main cut-off member and auxiliary cut-off member. Main cut-off member is mounted for movement in guide bushing of body and made as a piston with relief channel, flexible split member positioned in circular bore of piston and sealing disc installed for interaction with seat. Auxiliary cut-off member is used for overlapping the channel in piston and connected to electromagnet armature. Part of piston located below plane of sealing disc abutment to seat is shaped as a geometric figure of variable cross-section decreasing with removal from the disc plane. The part of piston is made as an independent member secured on end surface of piston. Auxiliary spring is positioned between main and auxiliary cut-off members. Diameter of sealing disc of main cut-off member exceeds internal diameter of guide bushing. EFFECT: higher reliability. 1 cl, 2 dwg
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