STOP-CONTROL VALVE Russian patent published in 2006 - IPC F16K3/22 

FIELD: valving.

SUBSTANCE: stop-control valve comprises housing with inlet and outlet passages. The inlet passage receives two valve gates. The first valve gate is made of additional rod with groove and step-shaped piston provided with openings. The first valve gate is set in the through axial step-shaped opening in the housing. The second valve gate is made of the step-shaped bushing-plunger that embraces the piston. The bushing is mounted for permitting axial movement and locking at end positions. The seat is piping and provided with openings. The openings are arranged downstream of the sealing member and sealing surface. The inner diameter of the piping section of the seat mates the outer diameter of the valve gate. At the end bottom position, the sealing surface of the step-shaped piston of the additional rod cooperates with the sealing member. The central section of the housing is provided with a radial groove which receives the rod provided with the groove at its end. The groove receives the short arm of the L-shaped lever connected with the rod.

EFFECT: enhanced reliability.

1 dwg