SOLENOID VALVE Russian patent published in 1995 - IPC

FIELD: valving. SUBSTANCE: coil is sealed with separating pipe and jacket and interposed between the housing and pole provided with the outlet branch pipe. A cut-off member-armature has the central opening and is mounted in the flowing passage of the housing and spring-loaded to the seat. A cylindric bore is provided in the pole. The cut-off member-armature is constructed as a piston made of magneto-soft material and having a shank which is made of non-magnetic material and rigidly secured to it. The shank is received in the bore of the pole for movement. An additional passage is made in the housing. The flowing passage of the housing is in communication with the space between surfaces of the armature and pole which face each other through the additional passage. Sealing rings are mounted on the outer surfaces of the piston and shank. The difference between the area of piston cross-section and shank cross- section is equal to the area of the sealing surface of the seat. EFFECT: enhanced efficiency. 1 dwg