PVJA8WV - Pilot operated, pressure reducing/relieving main stage with integral T-8A control cavity and drain to port 4

Part Number: PVJA8WV

Manufacturer: Sun Hydraulics

DESCRIPTION:

This valve is a 3-way, normally open modulating element, externally drained, that incorporates an integral pilot control cavity. The pilot control cavity will accept any T-8A pressure control cartridge. The valve reduces a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full flow relief function from port 1 to tank (port 3). The pilot cartridge's setting determines the difference in pressure between reduced pressure (port 1) and the drain (port 4).

  • Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
  • Pilot operated valves exhibit very low dead-band transition between reducing and relieving modes.
  • Pressure at port 4 should not exceed 5000 psi (350 bar).
  • Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
  • Pressure on the drain (port 4) is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
  • Maximum inlet pressure is determined by the bias spring. The D spring is tested with 2000 psi (140 bar) maximum differential pressure and the W spring is tested with 5000 psi (350 bar) maximum inlet pressure.
  • NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into the main stage valve to its required torque value.
  • The -8 control option allows the pilot control valve to be incorporated directly into the end of the relief cartridge via the T-8A cavity. These pilot control cartridges are sold separately and include electro-proportional, solenoid, air pilot, and hydraulic pilot operation. See Pilot Control Cartridges.
  • Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
  • 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.

CavityT-24A
Series4
Capacity80 gpm320 L/min.
Maximum Operating Pressure5000 psi350 bar
Control Pilot Flow15 - 20 in³/min.0,25 - 0,33 L/min.
Pilot Control CavityT-8AT-8A
Valve Hex Size1 5/8 in.41,3 mm
Valve Installation Torque350 - 375 lbf ft474 - 508 Nm
Model Weight3.10 lb1,40 kg
Seal kit - CartridgeViton: 990-024-006

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Notes:
  • Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at point of use.

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