Hitachi Excavator EX220 Hydraulic Cartridge Type Pressure Relief Valve

Model: Hitachi EX220C01 series -111034
Place of Origin: Zhejiang,China (Mainland)
Power: Hydraulic
Standard or Nonstandard: Standard
Pressure: High Pressure
Structure: Shutoff
Material: Others
Temperature of Media: High Temperature
Media: Oil
Brand Name: Egmec
Product:: Hydraulic cartridge type pressure relief valves for replace the original valve of Hitachi Ex220 excavator series
Operation pressure:: 320bar-380bar /4640PSI-5510PSI
Raw materials:: Stainless steel, normal carbon steel or alloy steel
Application machine:: Hitachi Excavator EX220 Series
Driven Type:: Direct operated pressure relief
Working temperature:: -20~+80℃ or as customers indicated
Assembly type:: Standard cavity for Hitachi excavator EX220 hydraulic power system
Medium:: Mineral based oil, such as 32#, 46# or equals medium
Surface treatment:: Chrome plated, zinc plated or original hardening surface
Recommended filtration:: 25 Micron or better

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Product Description

Payment & Shipping Terms Supply Capacity
Trade Term:FOBProduction Capacity:15000
Payment Terms:L/C, D/P, D/A, T/T, WUPacking:Standard packing for...
Min. Order:50 Set/SetsDelivery Date:Depending quantity
Means of Transport:Express, Ocean, Air, Land

Brief introduction:

    The hydraulic cartridge type pressure relief valves as a replacement parts for Hitachi Ex220 excavator series. If the hydraulic crawler excavator sometimes appears the weakness of operation, which due to the failure of cartridge type pressure relief valves in the hydraulic system.

There are two reason leads to the low pressure:
    Hitachi Ex220 excavator use double swash plate axial variable piston pump. Under normal circumstances, the main pump output hydraulic pressure ≥ 30MPa. If more than the standard amount of wear between the plunger and the cylinder of the main pump or between the end face of the cylinder valve plate (the gap between the plunger and the cylinder should be less than 0.02mm, between the cylinder end face of the valve plate the contact area should not be less than 90%) , it will cause the main pump output pressure is low , reflected in a mechanical device, there will be the phenomenon of the working of weakness.

    To achieve the best match in the main pump and engine power, it should be given the full pay to the role of the engine for the output of the pump flow varies with the change of engine power. The hydraulic cartridge type pressure relief valve is used to adjust the main pump flow volume, for example, the valve spool stuck, valve spring broken, which will cause the main pump is always in a constant flow. If the main pump has been in a state of the small flow machine at work will weakness, low pressure and slow action.

Hitachi Excavator EX220 Hydraulic Cartridge Type Pressure Relief Valve


Hitachi Excavator EX220 Hydraulic Cartridge Type Pressure Relief Valve
Hitachi Excavator EX220 Hydraulic Cartridge Type Pressure Relief Valve

Category: Hitachi Excavator Cartridge Type Valves

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