Electro-Proportional Valves — Flow Control

PV72-21 — Spool-Type, 2-Port, Normally Open, Restrictive
  Selection guide - similar valves.
  PDF file of this page.
  STP file for PV72-21.
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PV72-21 Valve

SYMBOL:
PV72-21 Valve symbol
DESCRIPTION
A solenoid-operated, electrically-variable, 2-port, pressure-compensated, normally
closed, proportional flow control, spool-type, screw-in hydraulic cartridge valve.

OPERATION
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.

FEATURES
• 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: Port 1: 240 bar (3500 psi); Port 2: 207 bar (3000 psi)
Regulated Flow: 0 to 56 lpm (15 gpm)
Internal Leakage: 0.38 lpm (0.1 gpm) fully closed at 207 bar (3000 psi)
Electrical: 2 standard voltage ratings:
 Coil Voltage
Threshold Current
Max. Control Current
 12 VDC
150 ±100 mA
1350 ±150 mA
24 VDC 75 ±50 mA 675 ±75 mA
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon 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: No restrictions; See page 9.020.1
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

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:

PV72-21 Valve Performance graphs

 

DIMENSIONS:

PV72-21 Valve Dimensions

 

MATERIALS:

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.

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.

 

ORDERING CHART:

PV72-21 Ordering