CONTROLLED VALVE Russian patent published in 2012 - IPC F16K31/126 

FIELD: machine building.

SUBSTANCE: proposed valve is provided with bellows. One of the latter is arranged in pneumatic drive chamber, its one end being tightly secured in the body while another one is fixed on piston. Another bellow is arranged in intermediate chamber, its one end being tightly secured in the body while another one is arranged on follower. Pneumatic drive chamber is furnished with union. Feed and discharge channels are aligned and arranged inclined to body axis. Tapered seat is arranged in body and provided with flange on taper larger base side. Said flange thrusts against body ledge by one side while chamfer is made on its other side to receive sealing gasket clamped by fastener. Seat end face surface on taper smaller base side is furnished with annular ledges with groove arranged there between. External ledge is provided with radial channels. Circular ledges interact with shutoff element end face, said element being arranged aligned with valve follower to interact therewith by end face. Follower outer surface accommodates rest and support to allow kinematic freedom for angular self-alignment on guides. Said follower and piston are arranged to allow displacing shutoff element toward its opening on feeding control pressure into pneumatic drive chamber.

EFFECT: higher reliability, expanded performances.

1 dwg