FTHCXYV - 4-way, 3-position, meter in proportional directional valve

Part Number: FTHCXYV

Manufacturer: Sun Hydraulics


This valve is a 4-way, 3 position, proportional directional valve. Work ports 2 and 4 are drained to 5 in the center position and port 3 is closed. Pilot pressure at port 1 opposes the spring and creates a variable metering orifice between ports 3 and 4 that is proportional to the pressure at 1. Piloting 6 opens 3 to 2. The force balance of the flow forces, spring and pilot pressure results in a degree of partial self compensation as the load pressure changes.

Pressure at ports 1 and 6 directly oppose each other.

  • Maximum pilot pressure for ports 1 and 6 should not exceed 500 psi (35 bar).
  • These valves may be pressure compensated by an external, modulating, logic element. Use LR_C-XHN for a bypass circuit or LP_C-XHN for a restrictive circuit.
  • The valve provides a degree of self-compensation and may be used as a flow control. To increase the accuracy of flow control, an external, modulating, logic element can be used to maintain a constant flow over a wider range of flows and pressures. See performance curves for additional information.
  • Pressure at ports 1 and 6 directly oppose each other.
  • 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 T-54A
Series 4
Capacity 80 gpm320 L/min.
Minimum Pilot Pressure Required to Shift Valve 80 psi5,5 bar
Maximum Operating Pressure 5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 5 in³/min.@1000 psi80 cc/min.@70 bar
Pilot Volume Displacement .26 in³4,3 cc
Maximum Pilot Pressure 500 psi35 bar
Hysteresis ± 2 %± 2 %
Valve Hex Size 1 5/8 in.41,3 mm
Valve Installation Torque 350 - 375 lbf ft475 - 508 Nm
Seal kit - Cartridge Viton: 990-054-006

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