OIL-PRESSURE ELEVATOR CONTROL VALVE DEVICE

摘要

The device is designed to control the quantity of flow supplied to or discharged from a hydraulic cylinder by controlling the number of rotation of a hydraulic pump. The device includes : a hydraulic cylinder (4) of a car (1); a hydraulic hose (5); a stop valve (6); an emergency down manual valve (7); a minimum pressure setting relief valve (8); a pilot operation main check valve (9); a main check valve opening solenoid valve (11); a main check valve closing solenoid valve (12); an unloading solenoid valve (13); and covers (29, 32).