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Heavy-Duty Main Relief Valves & Hydraulic Pressure Control Spares
Special Offers
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4309832 Relief Valve Compatible with Hitachi John Deere Excavator ZAX200 EX200-5
4309832 Relief Valve Compatible with Hitachi John Deere Excavator ZAX200 EX200-5 Part Number: 4309832 Application: Compatible with Hitachi John Deere Excavator ZAX200 EX200-5 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification...Regular price $ 89 -
Overload Relief Valve B-21113-40051 for Hitachi LX110-7 ZX350H-3
Overload Relief Valve B-21113-40051 for Hitachi LX110-7 ZX350H-3 Part Number: 21113-40051 Application: for Hitachi LX110-7 ZX350H-3 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable operation: Ensures consistent...Regular price $ 89 -
4358914 Pressure Relief Valve Control Valve FITS for Hitachi Ex200-5 EX220-5
4358914 Pressure Relief Valve Control Valve FITS for Hitachi Ex200-5 EX220-5 Part Number: 4358914 Application: FITS for Hitachi Ex200-5 EX220-5 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation....Regular price $ 89 -
Relief Valve LJ014720 for CASE excavator CX210B CX210 CX240B CX240 CX290B
Relief Valve LJ014720 for CASE excavator CX210B CX210 CX240B CX240 CX290B Part Number: LJ014720 Application: for CASE excavator CX210B CX210 CX240B CX240 CX290B Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification...Regular price $ 129 -
Relief Valve LJ017090 for CASE Excavator CX350B CX360B CX370B SUMITOMO SH350-5
Relief Valve LJ017090 for CASE Excavator CX350B CX360B CX370B SUMITOMO SH350-5 Part Number: LJ017090 Application: for CASE Excavator CX350B CX360B CX370B SUMITOMO SH350-5 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification...Regular price $ 138 -
Main Relief Valve K9001804 42000257 420-00257 Compatible with Doosan Daewoo Excavator DX210 DX225LCB DX230LC DX220AF DX225LC
Main Relief Valve K9001804 42000257 420-00257 Compatible with Doosan Daewoo Excavator DX210 DX225LCB DX230LC DX220AF DX225LC Part Number: K9001804 42000257 420-00257 Application: Compatible with Doosan Daewoo Excavator DX210 DX225LCB DX230LC DX220AF DX225LC Condition: New Aftermarket Parts...Regular price $ 168
If your excavator is losing power under load or your hydraulic system is overheating, a worn replacement relief valve is often the root cause. As the primary safety and pressure regulator, a high-precision main relief valve protects your pumps and cylinders by diverting excess oil back to the tank once the set pressure is reached. BeeSpareParts stocks a wide range of cartridge and bolt-on relief valves built to maintain factory-spec breakout forces in harsh environments.
Hydraulic pressure issues are often linked to other components. If adjusting the valve doesn't restore power, we recommend inspecting your for internal wear, or browsing our to stop internal pressure bypass. Our relief valve assemblies feature hardened steel poppets and precision-wound springs, providing a cost-effective alternative to expensive original dealer parts.
Whether you need a main relief valve for an excavator, a port relief valve for a specific circuit, or a pressure control unit for a loader, our parts are factory-tested for accurate opening and closing pressures and are ready for fast international shipping. Regain your digging power—order your heavy-duty hydraulic valve solution today.
Fits for:
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Engine & Model Series: 4BT, 6BT, 4D95, 6D102, S6K, S4K, J05E, J08E, 4HK1, 6HK1.
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Equipment Models: ZX, PC, SK, EC, EX series excavators, backhoes, and mobile hydraulic systems.