CONSTANT LOW-PRESSURE SHUTOFF ELECTROPNEUMATIC VALVE Russian patent published in 2014 - IPC G05D16/00 

FIELD: machine building.

SUBSTANCE: shutoff electropneumatic valve comprises a gas supply channel, a high-pressure cavity with a regulating seat and a regulating gate installed in it with the gate being fitted by an auxiliary spring, a cylindrical chamber with a movable element which is fitted by a pusher interacting with the regulating gate and in the chamber on the side of the pusher providing for a low-pressure cavity with an off-take channel and on the opposite side - for a control cavity connected to the channel in the movable element and the pusher with the movable seat made in the pusher's end, an element serving to set for the specified low pressure, an adjusting spring installed in the control cavity and a control electromagnetic valve with an inlet seat communicated with the gas supply channel, regulating member actuated by an electromagnet, and an outlet seat. The control cavity is communicated with the cavity of the control electromagnetic valve with the outlet seat connected to the atmosphere, and the low-pressure cavity is separated from the high-pressure cavity by a shutoff gate being the integral unit with the movable element, and by a shutoff seat placed on the side of the movable element and connected to the regulating seat by a direct-flow channel.

EFFECT: improved cost efficiency of gas supply systems due to no escape of gas into the atmosphere from the low-pressure cavity of a shutoff electropneumatic valve at its closure.

2 cl, 2 dwg