ELECTRIC PNEUMATIC VALVE Russian patent published in 2014 - IPC F16K31/02 

FIELD: machine building.

SUBSTANCE: electric pneumatic valve comprises a valve and a sear in an inlet cavity and a piston connected to the valve. The control cavity of the specified piston is communicated with the inlet cavity via unloading valves with the electromagnet, and also with the outlet cavity via a check valve. An additional large step is provided on the piston, facing the control cavity. The ratio of diameters of the smaller and larger steps makes from 0.8 to 0.9. The check valve communicates control and outlet cavities. The specified check valve is installed in the piston and has larger throughput section compared to the unloading valve. At the same time the diameter of the seat is equal to the diameter of the small step of the piston.

EFFECT: pneumatic shock is excluded in an outlet manifold as an electric pneumatic valve of large section opens, eliminates necessity for preliminary filling of a manifold with an electric pneumatic valve of small section, which makes it possible to prevent automatic oscillations of gas reducers and to reduce wear of movable parts and seals of pneumatic equipment, installed in the outlet manifold.

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