DESCRIPTION
A solenoid-operated, 2-way, normally closed, proportional valve designed for use with a pressure compensator to function as an electrically stroked variable flow regulator.
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. This valve is intended to function in tandem with standard HydraForce pressure compensators at pressure differentials of 12 bar (175 psi) or less, or alone in variable volume pressure-compensated circuits with load sense capability.
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.
• Optional control orifice sizes.
• Optional coil voltages and terminations.
• Efficient wet-armature construction.
• Cartridges are voltage-interchangeable.
• Unitized, molded coil design.
• Coil waterproofing standard.
• Manual Override option.
RATINGS
Operating Pressure: 207 bar (3000 psi)
Internal Leakage: 492 cc/min. (30 cu. in./min.) fully closed at 207 bar (3000 psi)
Electrical: 2 standard voltage ratings:
|
Coil Voltage
|
Threshold Current
|
Max. Control Current
|
|
12 VDC
|
300 ±70 mA
|
1500 ±100 mA
|
| 24 VDC |
150 ±35 mA |
750 ±100 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: VC12-3; 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
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
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