Swing Buffer Main Pump Relief Hydraulic Cartridge Valve For PC200-7 DH300
Price:
Please send mail or Whatsapp
MOQ:
1 Piece
Delivery Time:
1–7 Working Days After Payment
Brand:
ZVEZDA
Product Description
DH300 Swing Buffer Relief Cartridge Valve Assembly For DH300
Adopts wear-resistant alloy steel spool and high fatigue-resistant silicon manganese pressure spring, stable calibrated relief pressure without drift under long-term 340bar high-pressure hydraulic oil and frequent swing impact. Effectively eliminate aging defects of original valves: relief failure, severe swing impact, internal spool sticking, oil leakage at thread sealing surface. Stable mass production, sufficient stock for fast delivery.
| Specification | Details |
|---|---|
| Brand | ZVEZDA |
| Applicable Model | Doosan DH300 Large Excavator Swing Hydraulic Motor |
| Product Type | Full Alloy Steel Hydraulic Swing Overload Relief Cartridge Valve |
| Rated Relief Pressure | 290–340 Bar Swing System Standard Pressure |
| Instant Peak Bearing Pressure | 370 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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Q1
Q: Which Doosan large excavators fit ZVEZDA DH300 swing relief valve?
A: Direct replacement for Doosan DH300 large excavators, standard cartridge size, directly insert into swing motor without modifying valve cavity. In stock, ship within 1–7 working days.
Q2
Q: Excavator still has swing impact noise and weak swing torque after replacement?
A: Fatigued pressure spring leads to drifted relief pressure, replace complete ZVEZDA integrated swing relief cartridge to restore standard swing buffer pressure and normal swing power.
Q3
Q: Can this swing relief valve replace main circuit relief valve or unloading valve?
A: Not interchangeable. This high pressure hydraulic cartridge valve is used for swing overload protection; main relief valve controls whole machine main circuit pressure, unloading valve adjusts idle medium pressure, different medium, pressure range and working principle.
Q4
Q: Core advantages of ZVEZDA DH300 swing 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 DH300 swing hydraulic overload protection system.
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Company
Guangzhou Qichao Machinery Parts Co., Ltd.
Location
825-827, Zhuji International Machinery City, No.36 Zhuji Road, Tianhe District, Guangzhou, China
Contact Person
Sales