FIELD: mechanical engineering.
SUBSTANCE: valve comprises relieved plunger with sealing surfaces. The plunger is mounted inside the inner housing with a seating ring space. The plunger is provided with metallic welded bellows. One end of the bellows is tightly connected with the plunger. The other end of the bellows is tightly connected with the inner housing. The mean diameter of the bellows is greater then that of the sealing surface of the seat. The inner space of the bellows is in communication with the space of high pressure. The space receives the stop valve. The area of the flowing section of the stop valve is greater that the area of the seat ring space.
EFFECT: enhanced reliability.
4 dwg
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