Model

HVCALAN

Control
Adjustment Range
Seal Material

Model: HVCA

Ventable, pilot-operated, balanced piston relief valve - before check

Cavity: T-21A | Capacity:

Model

HVCALAN

Control
Adjustment Range
Seal Material

Technical specifications

The ventable relief-before-check cartridge is a CavitySaver™ (multi-function) valve incorporating a ventable, pilot-operated, balanced piston relief tee'd in before a check function. When the pressure at the inlet (port 2) reaches the relief valve setting, the valve starts to open to tank (port 3), throttling flow to regulate the pressure. The check valve flow is from the inlet (port 2) to the system port (port1). The valve includes a vent port (port 4) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves. These valves are accurate, have low pressure rise vs. flow, are smooth, quiet, and are moderately fast.

  • Note! This valve deviates from Sun's normal flow path for relief valves. It is probably not useable in current Sun relief manifolds.
  • Minimum setting is 75 psi (5 bar) for all spring ranges.
  • Back pressure at port 3 (tank) is directly additive to the valve setting at a 1:1 ratio.
  • The check portion of the valve has a maximum leakage rate of less than 1 drop/minute (0,07 cc/min).
  • One purpose of this dual function cartridge is to offer pump isolation and relief protection in single and/or multiple pump circuits. Another purpose is to act as a main stage in an accumulator sense, pump unload circuit.
  • A remote pilot relief on port 4 (vent) will control the valve below its own setting.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
  • Cavity
  • Series
  • Capacity
    10 gpm
  • Maximum Operating Pressure
    5000 psi
  • Check Cracking Pressure
    25 psi
  • Factory Pressure Settings Established at
    4 gpm
  • Maximum Valve Leakage at 110 SUS (24 cSt)
    2 in³/min.@1000 psi
  • Response Time - Typical
    10 ms
  • Adjustment - No. of CW Turns from Min. to Max. setting
    5
  • Valve Hex Size
    7/8 in.
  • Valve Installation Torque
    30 - 35 lbf ft
  • Adjustment Screw Internal Hex Size
    5/32 in.
  • Locknut Hex Size
    9/16 in.
  • Locknut Torque
    80 - 90 lbf in.
  • Model Weight
    .35 lb
  • Seal kit - Cartridge
  • Seal kit - Cartridge
  • Seal kit - Cartridge

Model CAD Files

Files not yet avialable. Click below to request them.

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