• Specification

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EX200-5 ZAX200 ZAX330 ZAX450 ZAX670 ZAX870 Excavator parts pilot filter element relief valve relief valve core

Working principle of pilot filter element relief valve

The pressure oil enters the lower chamber of the main valve piston from the inlet, and enters the upper chamber of the piston through the damping hole. When the system pressure is less than the spring force of the pilot valve core, the pilot valve core is not opened, the upper and lower forces of the piston are balanced, and the main valve is closed under the action of the spring. When the inlet pressure of the relief valve increases and exceeds the set pressure of the pilot valve core, the pilot valve core opens, the pressure oil in the upper chamber of the main valve is discharged through the pilot valve, and the pressure in the upper chamber is reduced to zero. The main valve moves upward under the pressure difference between the upper and lower chambers, opens the valve core, and the inlet pressure oil flows into the oil discharge port through the main valve core to achieve overflow and reduce the inlet oil pressure. When the inlet oil pressure drops below the set pressure of the pilot valve, the pilot valve core is closed, the upper chamber of the main valve re-establishes pressure, and the main valve core moves downward to close the main valve.

Applied in various hydraulic systems, including engineering machinery, metallurgical equipment and other fields, mainly used to control the pressure and flow of the hydraulic system to ensure the safe and stable operation of the equipment, such as controlling the action pressure of the hydraulic cylinder, protecting the hydraulic system pipelines and components, etc.

Our advantage

1. Stable performance: under normal use conditions, the performance of the product will not change significantly, which can meet the needs of users.

2. Stable appearance: the appearance of the product will not be obviously worn, faded or deformed during long-term use and storage.

3. Stable durability: the structure, performance and function of the product will not be significantly reduced during long-term use, and it can withstand various harsh environmental conditions.

4. Reliability and stability: during the long-term use of the product, its failure rate is low and it can maintain a stable running state.

FAQ:
1.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.

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!

Welcome to contact us for Inquiry & orde

If you are not sure about the model and part number - please contact us via WhatsApp

Who we are: We are excavator spare parts manufacturer to do high quality products

What we do: Our supply chain covers engine parts, hydraulic parts, relief valves, pilot pumps, gear parts electrical parts, seals, bearings, we serve the domestic market and overseas markets, in the field of excavator parts has more than 15 years of experience, our overseas customers to establish a strong partnership.

Our service object: excavator parts wholesalers, excavator parts dealers. Individual engineering team.

GVO Brand Excavator Parts is well known in China and internationally. Reliable service Massive inventory stock, so you do not have to wait for delivery time, we provide, Komatsu, Hitachi, Volvo, Hyundai, Dosan, Kobelco, Kato, Sumitomo, JCB, Sany, Xugong, Carter, Case, excavator parts are in stock.

Customers can obtain high-quality, correct parts at the most favorable price, the fastest way, high-quality parts, is our lifelong pursuit of the goal