Electro-Proportional Valves — Flow Control

PV72-31 — Spool-Type, 3-Port, Normally Open
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PV72-31 Valve

PV72-31 Valve symbol
A solenoid-operated, electrically-variable, 3-port, normally open, pressure-compensated,
proportional flow control, spool-type, screw-in hydraulic cartridge valve. It can be used as
a priority-type flow regulator with pressure-compensated, regulated and bypass flow. It can
also be used as a restrictive-type 2-way, pressure-compensated flow regulator when the
bypass line (port 2) is blocked.

The PV72-31 will regulate flow out of port 3 regardless of system working pressure.
With an increasing current applied to the solenoid, output flow will decrease.
Note: When used as a bypass flow control in applications where the priority flow port will
be blocked by external valving (dead-headed), bypass pressure drop will increase unless
a small amount of leakage is provided for the priority port. Consult factory.

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 until positive stop is found.

• Excellent linearity and hysteresis characteristics.
• Hardened spool and cage for long life.
• Optional coil voltages and terminations.
• Efficient wet-armature construction.
• Cartridges are voltage-interchangeable.
• Unitized, molded coil design.
• Coil waterproofing standard.
• Manual Override option.

Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 345 bar (5000 psi)
Burst Pressure: 896 bar (13000 psi)
Flow Rating: 0-53 lpm (0-14 gpm) for "A" flow range; 0-37.9 lpm (0-10 gpm)
   for "B" flow range. Note: For use in 2 ported mode consult factory
Internal Leakage: 0.38 lpm (0.1 gpm) fully closed at 207 bar (3000 psi)
Electrical Parameters: (with size 70 E-series and D-series coils)
E-Coil D-Coil
12 240 200 150 ± 100 1350 ± 150
24 700 600 75 ± 50 675 ± 75
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon seals;
   -54° to 107°C (-65° to 225°F) with polyurethane seals
Hysteresis: ± 1.9 lpm (0.50 gpm)
Dither/PWM Frequency Range: 100 to 250 Hz
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 9.112.1_3w
Cavity Tool: CT12-3x-xx; See page 8.600.1
Seal Kit: SK12-3x-MM; See page 8.650.1

The EVDR Series controllers are recommended for use with most HydraForce
proportional valves. These newer electronic controllers are versatile, reliable,
and easily configured and customized for a wide range of applications.
See the EVDR Product Selection Guide.
For other Electronic Controllers, see page 2.001.1_pdf




PV72-31 Valve Flow chart



PV72-31 Valve Dimensions



Cartridge: Weight: 0.36 kg (0.80 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups

Standard Ported Body: Weight: 1.09 kg
(2.4 lb); Anodized high-strength 6061 T6
aluminum alloy, rated to 207 bar
(3000 psi); Ductile iron bodies available;
dimensions may differ. See page 8.012.1_3w.

70-Size D-Coil: Weight each: 0.32 kg
(0.7 lb); Unitized thermoplastic encapsulated,
Class H high temperature magnetwire.
See page 3.200.1_70-size.

70-Size E-Coil: Weight each: 0.41 kg
(0.9 lb); Fully encapsulated with rugged
external metal shell. IP69K rated.
See page 3.400.1_70-size.



PV72-31 Ordering