Model

FPFKXDN

X-Control
Control
Flow Rate
Seal Material
Coil

Model: FPFK

Pilot-operated, normally closed, electro-proportional throttle with reverse flow check

Cavity: T-5A | Capacity:

Model

FPFKXDN

X-Control
Control
Flow Rate
Seal Material
Coil

Technical specifications

This valve is a pilot-operated, normally closed, electro-proportional throttle with reverse free-flow check. Energizing the coil generates an opening force on the pilot stage which vents the main stage poppet to open proportionally. Metered flow is from port 1 to port 2 with reverse free flow from port 2 to port 1.

  • Capable of operating with pressures up to 5000 psi (350 bar).
  • Coils are interchangeable with Sun's other full flow, solenoid-operated valves and can be mounted on the tube in either direction.
  • This cartridge has several manual override choices, including no manual override. See Option Configuration.
  • For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 100 - 250 Hz.
  • The momentary/twist override option "E" allows the operator to shift the valve by twisting the manual override clockwise 90 degrees.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Capacities rated at 200 psi (14 bar) differential and maximum rated coil current.
  • Maximum Deadband (as a percentage of command) B Flow Rate = 28% D Flow Rate = 32%
  • Maximum Hysteresis at 200 psid (14 bar) B Flow Rate = 2.2 gpm (9 L/min.) D Flow Rate = 5.2 gpm (20 L/min.)
  • Minimum Capacity at 1000 psid (70 bar) B Flow Rate = 25 gpm (94 L/min.) D Flow Rate = 49 gpm (185 L/min.)
  • Depending on circuit requirements, a reverse free flow check bypassing the compensator may be needed when using the FPFK with an external compensator.
  • 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
    20 gpm
  • Recommended dither frequency
    100 Hz
  • Deadband, nominal (as a percentage of input)
    25%
  • Manual Override Force Requirement
    5 lbs/1000 psi @ Port 1
  • Manual Override Stroke
    .06 in.
  • Maximum Valve Leakage at 110 SUS (24 cSt)
    20 drops/min.@5000 psi
  • Solenoid Tube Diameter
    .75 in.
  • Valve Hex Size
    1 1/8 in.
  • Valve Installation Torque
    45 - 50 lbf ft
  • Model Weight
    .70 lb
  • Model Weight (with coil)
    1.20 lb
  • Seal and nut kit - Coil
  • Seal kit - Cartridge
  • Seal kit - Cartridge
  • Seal kit - Cartridge

Model CAD Files

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