LDRD

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Description

A cartridge-style direct-acting relief valve

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  • Technical Feature

    OPERATION:

    The valve is normally closed, pressure-limiting valves used to protect hydraulic
    components from pressure transients. When the pressure at the inlet (port
    ① ) reaches
    the valve setting, the valve starts to open to tank (port
    ② ), throttling flow to limit the
    pressure rise. These valves are smooth and quiet, essentially zero leak, dirt tolerant,
    immune to silting and are very fast.

  • PerformanceCurves

    QX1.png

  • Technical Data

    Operating Pressure
    350Bar
    Flow
    See PRESSURE DROP VS.FLOW graph.
    Cavity
    SUN T-10A
    Filtration
    Refer to "Cleanliness of Hydraulic Fluid"
    Maximum valve leakage at reseat
    10 drops/min
    Reseat Pressure
    >80% of setting pressure
    Standard Spring Ranges
    A 35-210 bar; preset: 70 bar
    W 55-315 bar; preset: 70 bar
    B 20-105 bar; preset: 70 bar
    C 70-420 bar; preset: 70 bar
    D 14- 55 bar; preset: 28 bar
    Temperature
    -40°F to +250°F(-40°C to +120°C)
    Fluids
    Mineral-based fluids with viscosities of 7.4 to 420 cSt.
    Body Material
    Steel & Ductile iron rated to 350bar
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    PDF File
  • ACCESSORIES

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