Pilot-operated principle:
It may also be a pilot-operated safety valve, which consists of a main valve and a pilot valve. When the system pressure is normal, the pilot valve is closed, the pressure in the upper chamber of the main valve piston is balanced with the pressure in the lower chamber, and the main valve is closed. When the system pressure exceeds the set pressure of the pilot valve, the pilot valve opens, the pressure in the upper chamber of the main valve is released through the pilot valve, and the pressure in the lower chamber of the main valve pushes the main valve disc to open to achieve pressure relief.
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.
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.I 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.
5.can I order one of our samples for testing first?
A: Of course!
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