START-UP SHUTOFF ELECTRIC PNEUMATIC VALVE OF CONTINUOUS LOW PRESSURE Russian patent published in 2014 - IPC G05D16/00 

FIELD: machine building.

SUBSTANCE: start-up shutoff electric pneumatic valve is designed for shut-off of gas and its supply to a load with continuous low pressure. The start-up shutoff electric pneumatic valve comprises a cavity of high pressure with a gas supply channel and a cylindrical chamber separated from it with a fixed control seat and a control gate with a movable element, equipped with a pusher interacting with the control gate and creating a low pressure cavity in a chamber at the side of the pusher with a drain channel, and at the opposite side - a control cavity connected by a channel in a fixed element and a pusher with a movable seat, made in the end of the pusher, a tuning element for the specified low pressure, a mechanical spring arranged in the cavity of control and a control electromagnetic valve with an inlet seat communicated with a gas supply channel, a control element driven by an electromagnet, and an outlet seat. The control cavity is communicated with the cavity of the control electromagnetic valve with an outlet seat connected to atmosphere, and the gas supply channel is separated from the high pressure cavity by a fixed shutoff seat and a shutoff seat, making a whole with the control gate.

EFFECT: increased cost-effectiveness of gas supply systems due to elimination of gas leakage into atmosphere from a low-pressure cavity of a start-up shutoff electric pneumatic valve when closed, made in case of multiple connections and disconnections.

1 dwg