PRESSURE RELIEF PNEUMATIC VALVE Russian patent published in 1994 - IPC

FIELD: automatic control. SUBSTANCE: pressure reliaef pneumatic valve has body 1 with throttling valve 3 installed between inlet space and outlet space. Throttling valve is connected through pushrod 5 with rigid centre of diaphragm 7. Inlet space communicates with above-diaphragm space through axial hole of pushrod. Under-diaphragm space communicates with outlet space through connecting channel and with above-diaphragm spacem, through check valve 8. Above-diaphragm space communicates with atmosphere through adjusting member. EFFECT: enhanced accuracy, reliability and response of pressure relief pneumatic valve. 2 cl, 1 dwg