Guangzhou Qichao Machinery Parts Co., Ltd.
| Delivery Time | 1–7 Working Days After Payment |
| Warranty | 6 Months Under Continuous Excavator Working Condition |
| Origin | China |
| Supply Ability | 1000PCS/MONTH |
| Payment Terms | T/T |
| Sample Service | Single Sample Available |
| Packaging Details | Neutral Packing/Branded Packaging |
| Brand | ZVEZDA |
| Applicable Model | DH55, DH60-7 Mini Excavator Main Hydraulic Pump |
| Place of Origin | CHINA |
| Model Number | DH55 DH60-7 |
| Brand Name | ZVEZDA |
View Detail Information
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Product Specification
| Delivery Time | 1–7 Working Days After Payment | Warranty | 6 Months Under Continuous Excavator Working Condition |
| Origin | China | Supply Ability | 1000PCS/MONTH |
| Payment Terms | T/T | Sample Service | Single Sample Available |
| Packaging Details | Neutral Packing/Branded Packaging | Brand | ZVEZDA |
| Applicable Model | DH55, DH60-7 Mini Excavator Main Hydraulic Pump | Place of Origin | CHINA |
| Model Number | DH55 DH60-7 | Brand Name | ZVEZDA |
| High Light | Overload excavator pressure relief valve ，DH60-7 excavator pressure relief valve ，Excavator cartridge valve assembly | ||
Complete multi-item strict inspection before factory shipment: alloy steel spool wear cycle test, relief pressure precise calibration test, HNBR seal high-pressure oil immersion aging test, thread sealing pressure holding test.
| Specification | Details |
|---|---|
| Brand | ZVEZDA |
| Applicable Model | Doosan DH55, DH60-7 Mini Excavator Main Hydraulic Pump |
| Product Type | Full Alloy Steel Hydraulic Main Circuit Overload Relief Cartridge Valve |
| Rated Relief Pressure | 260–320 Bar Main System Standard Pressure |
| Instant Peak Bearing Pressure | 350 Bar |
| Sealing Material | Double-Layer HNBR High Pressure Oil Resistant O-Ring |
| Cartridge Material | Anti-Corrosion High Strength Alloy Steel |
| Origin | China |
| Delivery Time | 1–7 Working Days After Payment |
| Warranty | 6 Months Under Continuous Excavator Working Condition |
| Packaging | Neutral Carton Packing, No Brand Logo |
| Supporting Accessories | Complete Cartridge Valve + Spare HNBR Seal O-Rings |
| Sample Service | Single Sample Available With Relief Pressure Stability Test Report |
|
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| No. | Question & Answer |
|---|---|
| Q1 | Q: Which Doosan mini excavators fit ZVEZDA DH55 main relief valve?
A: Direct replacement for Doosan DH55 and DH60-7 mini excavators, standard cartridge size, directly insert into main valve block without modifying valve cavity. In stock, ship within 1–7 working days. |
| Q2 | Q: Excavator still weak digging and engine stall under heavy load after replacement?
A: Fatigued pressure spring leads to drifted relief pressure, replace complete ZVEZDA integrated main relief cartridge to restore standard main circuit pressure and normal digging power. |
| Q3 | Q: Can this main relief valve replace fuel rail pressure sensor or oil pressure switch?
A: Not interchangeable. This high pressure hydraulic cartridge valve is used for main circuit overload protection; fuel sensor detects diesel pressure, oil pressure switch is mechanical low pressure lubrication alarm part, different medium, pressure range and working principle. |
| Q4 | Q: Core advantages of ZVEZDA DH55 main relief valve?
A: High strength alloy steel anti-wear spool, high fatigue resistant silicon manganese pressure spring, stable fixed relief pressure, double-layer HNBR high pressure anti-leakage sealing, full anti-rust precision ground cartridge body, OEM standard cartridge dimension direct replacement, neutral unbranded packaging, perfectly match DH55/DH60-7 main hydraulic overload protection system. |
Company Details
Business Type:
Manufacturer
Total Annual:
5000000-10000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Guangzhou Qichao Machinery Co., Ltd. Premier Factory Specializing in R&D & Production of Excavator Electrical Spare Parts Based in Zhuji International Machinery City,Tianhe District,Guanazhou. Our full product lineup covers solenoid valves, sensors, throttle motors, controllers flameout swi... Guangzhou Qichao Machinery Co., Ltd. Premier Factory Specializing in R&D & Production of Excavator Electrical Spare Parts Based in Zhuji International Machinery City,Tianhe District,Guanazhou. Our full product lineup covers solenoid valves, sensors, throttle motors, controllers flameout swi...
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