Sun Hydraulics offers 2-, 3- and 4-port flow control cartridges for metering and flow regulation. Sun flow control options include:

  • Electro-proportional throttle valves
  • Needle valves with or without free flow check
  • Fully adjustable needle valves
  • Pressure compensated valves
  • 3- and 4-port priority flow controls

PFCCV-BRFO.jpg

Bypass / Restrictive, Fixed Orifice

  • Maximum operating pressure = 5000 psi
  • Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
  • Pressure at the bypass port (port 2) may exceed pressure at the priority port (port 3).
  • Maximum pressure at port 3 should be limited to 3000 psi.
  • Both priority and bypass flow are usable up to the system operating pressure.
  • Bypass flow is not available until priority flow requirements are satisfied.
  • Blocking priority flow will also block bypass flow.
PFCCV-VBRFO.jpg

Ventable, Bypass / Restrictive, Fixed Orifice

  • Maximum operating pressure = 5000 psi
  • Nominal vent flow = 46 in³/min.
  • Pressure at the bypass port (port 2) may exceed pressure at the priority port (port 3).
  • Maximum pressure at port 3 should be limited to 3000 psi.
  • Both priority and bypass flow are usable up to the system operating pressure.
  • Bypass flow is not available until priority flow requirements are satisfied, except when the valve is vented. When port 4 (vent) is open, all flow diverts to port 2 if pressure at port 1 (inlet) is 150 psi or higher.
  • Using a pressure control on port 4 will limit the pressure at the priority port (port 3). If pressure on the bypass port (port 2) exceeds the setting of the pressure control, priority flow will be shut off and all the flow will go out the bypass port.
  • Blocking priority flow will also block bypass flow.
PFCCV-VBRFOwIPCC.jpg

Ventable, Bypass / Restrictive, Fixed Orifice with Integral Pilot Control Cavity

  • Maximum operating pressure = 5000 psi
  • Nominal vent flow = 46 in³/min.
  • Pressure at the bypass port (port 2) may exceed pressure at the priority port (port 3).
  • Maximum pressure at port 3 should be limited to 3000 psi.
  • Both priority and bypass flow are usable up to the system operating pressure.
  • Bypass flow is not available until priority flow requirements are satisfied, except when the valve is vented. When port 4 (vent) is open, all flow diverts to port 2 if pressure at port 1 (inlet) is 150 psi or higher.
  • Using a pressure control on port 4 will limit the pressure at the priority port (port 3). If pressure on the bypass port (port 2) exceeds the setting of the pressure control, priority flow will be shut off and all the flow will go out the bypass port.
  • Blocking priority flow will also block bypass flow.
  • The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required torque value.
PFCCV-BRME.jpg

Bypass / Restrictive Modulating Element

  • Maximum operating pressure = 5000 psi
  • Bypass flow is not available until priority flow requirements are satisfied.
  • Bypass pressure at port 4 can be higher than pressure at control port 2.
  • Priority flow can be turned on or off with a pilot sized solenoid valve on port 1.