FIELD: mechanical engineering.
SUBSTANCE: valve comprises rigidly interconnected outer and inner housing. The inner housing is provided with the seat. The housings and the seat define straight axially symmetrical flowing part. The valve has unloaded plunger with sealing surface when it is in a contact with the seat and mechanism for axial movement of the plunger. The mechanism for axial movement of the plunger is made of a pressure-tight linear electric actuator. The windings of the stator of the electric actuator are mounted in the outer housing of the valve. The rotor is housed in the plunger. The plunger is provided with a metallic bellows. One end of the bellows is hermetically connected with the outer housing. When bellows is compressed, the outer housing allows the sealing surface of the plunger to move toward the seat in the direction of fluid flow. The bellows is welded.
EFFECT: enhanced reliability.
1 cl, 3 dwg
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