ELECTROPNEUMATIC VALVE Russian patent published in 2002 - IPC

FIELD: electropneumatic valves designed for control of air cylinder operation. SUBSTANCE: electropneumatic valve has solenoid drive engageable with relief valve; body with the first seat; inlet, the first outlet and draining channels; control piston with the second seat. Control piston is engageable with the second valve having the first seal common for the first and second seats. Body has the second outlet channel and the third seat. Control piston has the fourth seat and rod. Rod is located in central hole of main valve. The second seal common for the third and fourth seats is located on the other end of main valve. Main valve is installed between body seats and seats of central piston for communication of the second outlet channel with inlet and draining channels. EFFECT: higher economical effect due to simplified design and reduced labor input, or due to reduced number of electropneumatic valves from two to one for control of air cylinders. 2 dwg