PV72-33 Proportional Flow Control Cartridge, (PV72-33)
A linear solenoid-driven, two-way normally closed, screw-in cartridge valve designed for use with a pressure compensator to function as an electrically stroked variable flow regulator.
Product Operation
With increasing electric current, the PV72-33 changes from full closed to full open with flow from port 3 to port 2. Port 1 is used only to pressure balance the spool and should be plugged. The proportional valve is intended to function in tandem with standard HydraForce pressure compensators at pressure differentials of 12 bar (175 psid) or less, or alone in variable volume pressure-compensated circuits with load sense capability.
The valve is designed to work with industry-common controllers which typically feature current capability to 2 amps @ 12 VDC, PWM, and start/stop trim adjustments (I-min./I-max.). Consult factory for details and potential sourcing.
Operation of Manual Override: To Engage: Turn clockwise approximately 1 turn to reach start point. Continue another approximately 5 turns to full shift.To Disengage: Turn counterclockwise approximately 6 turns to positive stop.
Product Features
• Excellent linearity and hysteresis.
• Optional control orifice sizes.
• Hardened spool and cage for long life.
• Optional coil voltages and terminations.
• Efficient wet armature construction.
Product Ratings
Operating Pressure: 240 bar (3500 psi)
Internal Leakage: 492 cc/min. (30 cu. in./min.) fully closed at 207 bar (3000 psi)
Electrical: 2 standard voltage ratings
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1.
Cavity: VC12-3; See page 9.110.1;
Cavity Tool: CT12-3X-XX; See page 8.600.1
Seal Kit: SK12-3X-MM; See page 8.650.1 for seal kit options and appropriate seals based on application temperature range.
Threshold Current 300 ± 70 mA 150 ± 35 mA
Coil Voltage12 VDC24 VDC
Max. Control Current 1500 ± 100 mA 750 ± 100 mA
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROLS
HYDRAFORCE.com®
• Cartridges voltage interchangeable.
• Unitized, molded coil design.
• Coil waterproofing standard.
• Manual override option.
Recommended Electronic Controllers:See page 2.001.1 or our Electronics catalog.
