SHUTOFF VALVE Russian patent published in 2004 - IPC

FIELD: mechanical engineering.

SUBSTANCE: valve has housing with the seat, loading spring, sensitive member with the sealing unit mounted for permitting movement along the direction of the fluid flow from its initial position to the seating of the sealing unit on the seat. The sensitive member has guiding surface made of a step piston. The great step of the piston faces the seat. The additional space formed by the piston steps is in communication with the working path through the throttle. The internal space of the sensitive member is a part of the working path. The flow area of the throttle is less than that of the working path.

EFFECT: enhanced reliability.

1 dwg