Excavator PC200-8 excavator common rail pressure relief valve 6754-72-1220

1. The excavator regenerative valve can speed up the fall speed and improve work efficiency.

2, excavator bucket rod regeneration valve includes a valve sleeve, a screw plug is threaded with one end of the valve sleeve, a valve head is connected with the other end of the valve sleeve, there is a fixed seat in the valve sleeve and plug, one end of an elastic part is connected with the fixed seat, one end of the valve spool sliding connected with the valve sleeve is connected with the other end of the elastic part, the other end of the valve spool is connected with the valve head, Insert a plunger with sliding connection in the center of the end part of the valve head extending into the valve sleeve, the part of the valve head located outside the valve sleeve is provided with a first radial through hole, one end of the plunger goes through the end of the valve head and connects with the valve core, the other end of the plunger extends into the first radial through hole, and an annular groove is provided on the circumference of the valve core. The valve sleeve is provided with a second radial through hole and a third radial through hole matched with an annular groove.

The main relief valve is installed on the upper and lower ends of the main control valve, one upper and one lower. The valve sets the maximum pressure for the entire hydraulic system to work. When the system pressure exceeds the set pressure of the main relief valve, the main relief valve opens the oil circuit of the return tank to overflow the hydraulic oil back to the tank to protect the entire hydraulic system and avoid excessive oil pressure.