Guangzhou Gangwo Engineering Machinery Parts Department
| Model | R210-7 R210-9 R215-7 R305 Excavators |
| Delivery Time | 3-7 Days |
| Services | During working hours |
| Part Name | Main Relief Valve |
| Packaging Details | Carton |
| Payment Terms | L/C,D/A,D/P,T/T |
| P/N | 31Q8-17781 31Q8-17783 31N6-17400 |
| MOQ | 1PC |
| Supply Ability | 10000 pcs per month |
| Stock | In stock |
| Model Number | R210-7 R210-9 R215-7 R305 Excavators |
| Brand Name | GVO |
| Certification | CE,ISO |
| Place of Origin | China |
View Detail Information
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Product Specification
| Model | R210-7 R210-9 R215-7 R305 Excavators | Delivery Time | 3-7 Days |
| Services | During working hours | Part Name | Main Relief Valve |
| Packaging Details | Carton | Payment Terms | L/C,D/A,D/P,T/T |
| P/N | 31Q8-17781 31Q8-17783 31N6-17400 | MOQ | 1PC |
| Supply Ability | 10000 pcs per month | Stock | In stock |
| Model Number | R210-7 R210-9 R215-7 R305 Excavators | Brand Name | GVO |
| Certification | CE,ISO | Place of Origin | China |
GVO 31Q8-17781 31Q8-17783 31N6-17400 Hydraulic Main Control Relief Valve Safety Valve for R210-7 R210-9 R215-7 R305 Excavators
Key attributes
|
Name |
Main Relief Valve |
Packing |
Carton |
|
Model |
|
Certificate | CE, ISO |
|
P/N |
31Q8-17781 31Q8-17783 31N6-17400 |
Delivery | 3-15 Days |
|
MOQ |
1PC |
Shipping port | Huangpu,Guangzhou |
Critical Overload Protection
The core function of these main relief valves is to limit the maximum working pressure of the hydraulic system. When system pressure rises abnormally – such as during heavy digging or breaking operations – the valve opens instantly to release excess oil back to the tank. This effectively prevents costly damage to the main pump, control valves, cylinders, and other core components.
Reliable Performance & System Stability
Featuring pilot-operated or direct-acting designs, these valves respond quickly and precisely to pressure changes. They maintain system pressure accurately at a preset safe level, ensuring stable, controllable power output during heavy-duty operations.
Rugged Construction for Demanding Conditions
Robust Valve Body – Made from high-strength materials with excellent corrosion resistance.
Durable Internals – Key internal components are hardened and precision-ground to withstand extreme pressures and wear.
Reliable Seals – Ensure long-term leak-free performance in hydraulic oil.
If you need other relief valves, send us the related details please:
1.The pictures
2.The p/n
3.The size
| Factor | GVO |
|---|---|
| Stock Availability | 40,000 m³ ready stock |
| Shipping Speed | Fast day dispatch |
| Matching Accuracy | Precision verification |
| Pricing Transparency | Clear, upfront pricing |
| Customer Support | Available at every stage |
The Difference
We don't just supply parts. We supply reliability, speed, and confidence.
GVO – The competitive edge you need.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
2012
Total Annual:
7500000-12000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
关于我们:我们是一家致力于生产高精度挖掘机配件的制造商. 我们的业务范围:我们的供应链主题发动机零部件,液压元件,溢流,先导泵,齿轮,电气元件,密封件和轴承.我们服务于第三个市场,在挖掘机零部件行业拥有超过15年的经验,... 关于我们:我们是一家致力于生产高精度挖掘机配件的制造商. 我们的业务范围:我们的供应链主题发动机零部件,液压元件,溢流,先导泵,齿轮,电气元件,密封件和轴承.我们服务于第三个市场,在挖掘机零部件行业拥有超过15年的经验,...
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