VALVE Russian patent published in 2018 - IPC F16K11/10 F16K31/124 

FIELD: machine engineering.

SUBSTANCE: in initial position, the protrusion of the shutter 2 spring-actuated 3 abuts the end part of the rod 11 of the piston 7, the valve cross-section is open. The initial position of the piston is provided by the force of the spring 6. When applying control pressure piston with rod 7, breaking the spring force 6, moves to another in its heel, with 1 bolt 2 lock with the end of stem 11 7 piston and sits on the saddle seal enclosure 1, closing the orifice valve and lug bolt 2 comes into the groove end part 11 7 piston rod. The required tightness to the piston is provided by the ring 9 and the collar 10.

EFFECT: use of this valve allows the valve to be held in the open position by the piston rod and allows the gate to fit into the seat ring when the piston is moved by the control command.

3 cl, 1 dwg