This RITO 4480289 4630691 Hydraulic Main Relief Valve is a critical safety component for Hitachi EX1900-5, EX1900-6, and EX2500 large mining excavators, designed to precisely regulate maximum hydraulic pressure and protect the system from overload. It ensures stable pressure control, reliable performance, and safe operation under extreme mining conditions.
Item NO.:
4480289Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time：
2-3 DAYSOverpressure, system instability, and unexpected failures can lead to costly downtime and serious equipment damage. This relief valve is engineered with OEM-level precision, featuring accurate pressure regulation, high-pressure resistance, and durable construction for continuous heavy-duty operation. Backed by RITO’s stable supply chain and professional technical team, we provide fast technical support and rapid replacement solutions to keep your mining operations running safely and efficiently.
| Part Number | 4480289 4630691 |
|---|---|
| Part Name | Control Valve |
| Compatible Brand | HITACHI |
| Applicable Models | EX1900-5, EX1900-6, EX2500 |
| Application | Excavator hydraulic system |
| Material | High-strength alloy steel |
| Product Color | Metallic gray |
| Working Temperature | -20°C to 120°C |
| Key Function | Regulate and limit hydraulic system pressure |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |
Maintains stable system pressure and prevents overload damage in high-demand mining operations.
Built for large excavators, capable of handling extreme pressure and continuous operation.
Manufactured to original specifications for reliable compatibility and stable performance.
Reduces risk of hydraulic system failure, extending component lifespan and lowering maintenance costs.
FAQ
A: Pressure instability, overpressure, leakage, or overheating usually indicate valve malfunction or wear.
A: Ensure correct pressure setting, proper sealing, and clean hydraulic oil to maintain safe operation.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
A: It protects high-value hydraulic systems from excessive pressure, preventing major failures and downtime.
Q:Can it handle extreme mining conditions?
A: Yes, it is designed for high-pressure, continuous heavy-duty operation in mining environments.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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