Electro-Proportional Valves — Flow Control

PV72-21 — Spool-Type, 2-Port, Normally Open, Restrictive
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PV72-21 Valve

PV72-21 Valve symbol
A solenoid operated, electrically-variable, two-port, pressure-compensated, spool-type, normally
open when de-energized, proportional flow control valve.

The PV72-21 will regulate flow out of port 2 regardless of system working pressure.
With an increasing current applied to the solenoid, output flow will decrease.
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.
• Efficient wet-armature construction.
• Optional coil voltages and terminations.
• Cartridges voltage interchangeable.
• Unitized molded coil design
• Coil waterproofing standard
• Manual override option

Pressure Rating: 240 bar (3500 psi)
Proof Pressure: 345 bar (5000 psi)
Regulated Flow: 0–57 lpm (0&mdasn;15 gpm)
Internal Leakage: 0.38 lpm (0.1 gpm) fully closed at 100 current
Electrical: (with 70–size coil):
Coil Voltage Valve Inductance (mH) Threshold
Current (mA)
Max Control
Current (mA)
E-Coil D-Coil
12 240 200 150 ± 100 1350 ± 150
24 700 600 75 ± 50 750 ± 50
Hysteresis: ±1.9 lpm (0.50 gpm) maximum
Dither/PWM Frequency Range: 100 to 250 Hz
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
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: Install D-series coils with two O-rings above and below the coil. Install E-series
   coils with only one O-ring above the coil. Manual override options M and G require Coil Nut Kits.
   See part numbers below. See Cartridge Installation, page 9.020.1 for cartridge, coil and coil
   retainer installation. To assure proper function, coil retainer must be installed.
Cavity: VC12-2, Variation 'B'; See page 9.112.1_2w
Cavity Tool: CT12-2x-xx; See page 8.600.1
Seal Kit: SK12-2x-M; See page 8.650.1
Coil Nut Kits: (for Manual Override Option G): 4001214; (for Manual Override Option M): 420218

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




PV72-21 Valve Performance graphs



PV72-21 Valve Dimensions



Cartridge: Weight: 0.32 kg (0.7 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups

Standard Ported Body: Weight: 0.59 kg
(1.3 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_2w.

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: 0.41 kg (0.9 lb);
Perfect wound, fully encapsulated with rugged
external metal shell; Rated up to IP69K with
integral connectors. See page 3.400.1_70-size.



PV72-21 Ordering