Electro-Proportional Valves — Flow Control

PV72-20 — Spool-Type, 2-Port, Normally Closed, Restrictive
  Selection guide - similar valves.
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  STP file for PV72-20.
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PV72-20 Valve

SYMBOL:
PV72-20 Valve symbol
DESCRIPTION
A solenoid-operated, two-port, pressure-compensated, spool-type, normally closed when
de-energized, proportional flow control valve.

OPERATION
The PV72-20 will regulate flow out of port 2 regardless of system working
pressure. With increasing current applied to the solenoid, the PV72-20 will increase output flow.

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.

FEATURES
• Choice of two regulated flow ranges
• Excellent linearity and hysteresis characteristics.
• Hardened spool and cage for long life.
• Efficient wet-armature construction.
• Optional coil voltages and terminations.
• Cartridges are voltage-interchangeable.
• Unitized molded coil design – waterproofing standard.
• Manual override option.

RATINGS
Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 345 bar (5000 psi)
Burst Pressure: 896 bar (13000 psi)
Regulated Flow: Range A: 0 to 64 lpm (0 to 17 gpm);
   Range B: 0 to 37.9 lpm (0 to 10 gpm)
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)
Coil Voltage Valve Inductance (mH) Threshold
Current (mA)
Max Control
Current (mA)
E-Coil D-Coil
12 240 200 250 ± 100 1500 ± 100
24 700 600 125 ± 50 750 ± 50
Hysteresis: ± 1.9 lpm (0.5 gpm) maximum
Dither/PWM Frequency Range: 100-250 Hz
Operating Fluid Temperature: -40 to 100°C (-40 to 212°F) with Buna N 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. See Cartridge Installation, page 9.020.1 for cartridge,
   coil and coil retainer installation. To assure proper function, coil retainer must be installed.
   Manual override options M and G require Coil Nut Kits. See part numbers below.
Cavity: VC12-2B, Variation 'B'; See page 9.112.1_2
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

RECOMMENDED ELECTRONIC CONTROLLERS
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



 

 

PERFORMANCE:

PV72-20 Valve Flow chart

 

DIMENSIONS:

PV72-20 Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.40 kg (0.88 lb) with
M option: 0.44 kg (0.98 lb) with G option:
0.55 kg (1.21 lb) Steel with hardened work
surfaces. Zinc-plated exposed surfaces.
Buna N O-rings and polyester elastomer
back-ups standard.

Standard Ported Body: Weight: 0.59 kg
(1.3 lb); Anodized high-strength 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.

 

ORDERING CHART:

PV72-20 Ordering