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    Main & Relief Valve

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    Main Relief Valve 103-8177 for Caterpillar Excavator CAT 318C 319C 320C 20D 321C 22C 324D 325C 325D 329D 330C 330D 336D M330D
    Main Relief Valve 103-8177 for Caterpillar Excavator CAT 318C 319C 320C 20D 321C 22C 324D 325C 325D 329D 330C 330D 336D M330D
    US$104.48
    For Hitachi Excavator ZX350K-3G Signal Valve
    For Hitachi Excavator ZX350K-3G Signal Valve
    US$1,665.55
    For Komatsu Excavator PC300-5 Main Relief Valve
    For Komatsu Excavator PC300-5 Main Relief Valve
    US$125.20
    For Kobelco Excavator SK55 Service Valve
    For Kobelco Excavator SK55 Service Valve
    US$2,736.56
    For Kato Excavator HD800 Relief Valve
    For Kato Excavator HD800 Relief Valve
    US$117.85
    For Caterpillar Excavator CAT E320D Relief Valve
    For Caterpillar Excavator CAT E320D Relief Valve
    US$103.15
    For Caterpillar Excavator CAT E200B Relief Valve
    For Caterpillar Excavator CAT E200B Relief Valve
    US$94.33
    For Caterpillar Excavator CAT 320C Relief Valve
    For Caterpillar Excavator CAT 320C Relief Valve
    US$93.70
    For Caterpillar Excavator CAT E200B Main Relief Valve
    For Caterpillar Excavator CAT E200B Main Relief Valve
    US$94.33
    Main Relief Valve for Caterpillar CAT Excavator 312
    Main Relief Valve for Caterpillar CAT Excavator 312
    US$83.83
    For Hitachi Excavator ZAX330 Relief Valve
    For Hitachi Excavator ZAX330 Relief Valve
    US$93.70
    For Hitachi Excavator ZAX270-1 Main Relief Valve
    For Hitachi Excavator ZAX270-1 Main Relief Valve
    US$93.70
    For Hitachi Excavator ZAX60 Main Relief Valve
    For Hitachi Excavator ZAX60 Main Relief Valve
    US$142.31
    For Hitachi Excavator ZAX70 Main Relief Valve
    For Hitachi Excavator ZAX70 Main Relief Valve
    US$142.31
    Main Relief Valve 0719308 for Hitachi Excavator EX300-5 EX350H-5 ZAX330 ZX350H ZX360H-3G ZX500W
    Main Relief Valve 0719308 for Hitachi Excavator EX300-5 EX350H-5 ZAX330 ZX350H ZX360H-3G ZX500W
    US$83.20
    For Hitachi Excavator ZAX330 Main Relief Valve
    For Hitachi Excavator ZAX330 Main Relief Valve
    US$83.20
    For Hitachi Excavator EX120-3 Main Relief Valve
    For Hitachi Excavator EX120-3 Main Relief Valve
    US$104.20
    For Hyundai Excavator R210 Relief Valve
    For Hyundai Excavator R210 Relief Valve
    US$93.70
    For Komatsu Excavator PC Pilot Pump Main Relief Valve
    For Komatsu Excavator PC Pilot Pump Main Relief Valve
    US$83.20
    For Komatsu Excavator PC300-5 Rotary Overflow Valve
    For Komatsu Excavator PC300-5 Rotary Overflow Valve
    US$262.50
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    Reliable Main & Relief Valve Solutions

    Boasting a stellar reputation for delivering top-tier, enduring products, our extensive range of primary valves and pressure relief valves guarantee dependable and effective pressure relief.

    Explore Our Main Valve and Relief Valve Catalog

    Whether for excavators, engines, telescopic boom lifts, transport refrigeration units, tractors, backhoe loaders, or bulldozers, we offer valves perfectly suited to your needs.

    Our valve selection includes, but is not limited to:

    1. Counterbalance valve: Balances loads in hydraulic systems, preventing sudden drops due to gravity or external factors.
    2. Position 4 way proportional valve: Controls actuator position and speed with precision.
    3. Air control valve: Manages airflow, commonly used in air suspension systems.
    4. Balanced piston relief valve: Regulates hydraulic system pressure, ensuring safe operation.
    5. Cartridge non-return valve: Prevents fluid backflow, ensuring unidirectional flow.
    6. Check valve: Controls fluid flow in one direction, preventing reverse flow.
    7. Directional valve: Determines fluid flow direction in hydraulic systems, directing fluid to different actuators or circuits.
    8. Flow control pump valve: Regulates pump flow in hydraulic systems, adjusting flow and pressure.
    9. Hydraulic relief valve: Controls system pressure to maintain safe operating conditions.
    10. Main relief valve: Primary relief valve in hydraulic systems, controlling overall system pressure.

    Our valves cater to a range of major equipment brands, including John Deere, Hitachi, Komatsu, Genie, Caterpillar, Thermo King, Yanmar, JCB, Hyundai, Kobelco, Perkins, Doosan, Daewoo, and more. Whatever your equipment brand, we provide high-quality, reliable valves to ensure smooth operations.

    What is a Main Valve?

    The main valve typically serves as a primary control valve for the entire hydraulic system, regulating fluid flow in and out and directing it as needed for specific functions.

    What is a Relief Valve?

    The relief valve controls the hydraulic system pressure not to exceed the specified value and does not have an electromagnetic coil. When the pressure exceeds the set value, the safety valve opens, releasing excess fluid to protect the system from overload damage.

    What is a Main Relief Valve?

    A main relief valve is a primary relief valve in hydraulic systems, controlling pressure across the entire system. Typically installed in the main hydraulic circuit, it ensures the system operates within safe pressure limits.

    If you are looking for OEM-quality main valves and relief valves, welcome to browse our website. With a wide selection, convenient search functionality, and easy installation, there's no need to look at other websites. Plus, we offer professional services as well as product guides are available.