Working Principle

When the excavator is working, the high-pressure oil output by the hydraulic pump enters the main overflow valve. Under normal circumstances, since the valve core in the valve is in a closed state due to the spring force, the high-pressure oil enters the ground cavity through the throttle hole inside the lift valve. At this time, the pressure difference on both sides of the valve core keeps the valve closed. When the system pressure rises to exceed the set pressure of the pilot cone valve spring, the pilot cone valve opens, and the high-pressure oil in the ground cavity enters the return oil circuit of the control valve through the pilot cone valve. The pressure in the ground cavity decreases, and the lift valve opens under the action of the left and right pressure difference, so that the high-pressure oil directly enters the return oil circuit to achieve overflow, thereby limiting the further increase of system pressure.

Function

- Pressure limit protection: Set the maximum pressure of the entire hydraulic system to prevent damage to hydraulic components such as oil pipes, oil cylinders, hydraulic pumps, etc. due to excessive system pressure, and control the pressure within a safe range.

- Stable performance: Ensure the stability of the hydraulic system pressure, so that the excavator can walk and other actions smoothly and reliably, avoid abnormal movements and impacts due to pressure fluctuations, and affect work efficiency and equipment life.

FAQ:

1.know only the excavator model, but can not offer parts No., what should I do ?

A;If possible, you can send us the old photo, nameplate or the size for reference.

2, Do you have stock for the goods?

A;We have plenty stock for many items in the warehouse.

3. Do you test all your goods before delivery?

A: Yes, we have a 100% test before delivery.

4.What is the warranty of the parts after I purchase?

A: The warranty is 6/12 Months based on the item details.Please consult sales for details

5.What do you mainly produce?

A;Our main business hydraulic Spare Parts,safety valve,Gear pump,hydraulic pump,control valve,Trave Motor Assy,swing motor,Seal kit, Electric parts,solenoid valve, engine assembly.etc.

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