Quick Quote

Quick Quote

  • Please select the sector that most closely matches your own from the list below.
  • PLEASE NOTE - our independence in a global marketplace gives you choice on pricing and delivery; quick delivery may raise product and shipping costs and vice versa.

  • Drop files here or

    Parker R4U Unloading Valves, Subplate Mounting

    • Description
    • Technical Data

    Description

    Parker R4U valves are subplate mounted unloading valves. They are used to unload a circuit at low pressure, even under high flow conditions. Typical applications are pump unloading in an accumulator circuit or unloading the low pressure stage of a double pump.

    The mechanically adjustable pressure signal to unload the main stage has to be applied to port X. The pressure differential between opening and closing is nominal 15 or 28 % of the setting pressure: 28 % for pressure stages 105 and 210 bar, and 15 % for pressure stage 350 bar

    Features and benefits of Parker R4U valves include:

    • Pilot operated
    • Subplate mounting interface to ISO 5781
    • High performance – maximum adjustable pressure of 350 bar
    • Flow capacity ranging from 150 to 650 litres / minute
    • Pilot stage design reduces pressure overshoot and cracking flow to a minimum
    • Precise adjustment and quick response – eliminate pressure variation and system shocks
    • 3 pressure stages for sensitive control
    • 2 vent valve functions; available with an electrical vent valve for unpressurised circulation
    • 3 adjustment modes: hand knob | acorn nut with lead seal | cylinder lock

    Contact us for further technical details and configuration options.

    Quick Quote
    It looks like you're visiting us from the US

    close x

    WELCOME!

    WE ARE A ONE-STOP HYDRAULIC HUB, OFFERING EUROPEAN BRANDS AND

    FAST DELIVERY TO THE US

    Contact our award-winning team today for a
    competitive quote and lead-time on:

    Parker Denison | Bosch Rexroth | Danfoss | Casappa | Hawe
    Dowty | MP Filtri | Oil Control | Smiths Industries | Vivoil | Walvoil

    Quick quote

    close x

    Please note

    This is a system generated translation and as such will not be fully accurate. We are not responsible for incorrect or inaccurate translations and will not be held responsible for any damage or issues that may result from using this service.