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A solenoid-operated, electrically-variable, pressure-compensated, spool-type, normally open when de-energized, proportional, bi-directional flow control valve. An internal compensator spool provides compensated flow across the proportional orifice regardless of flow direction.
The ZL72-31 provides regulated flow in both directions: from port ➁ to port ➂, or from port ➂ to port ➁. Port ➀ should be blocked. Regulated flow is inversely proportional to electric current applied to the solenoid.
Operation of 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.
• Hardened spool and cage for long life.
• Effi cient wet armature construction.
• Optional coil voltages and terminations.
• Cartridges voltage interchangeable.
Maximum Operating Pressure: 240 bar (3500 psi)
Regulated Flow: 0-50 lpm (0-13 gpm)
Internal Leakage: 0.38 lpm (0.10 gpm) maximum at 1.5 amp
Electrical: 2 standard voltage ratings
Temperature: -40 to 120°C with Buna N 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
Cavity Tool: CT12-3X-XX; See page 8.600.1
Seal Kit: SK12-3X-MM; See page 8.650.1
Threshold Current 150 ± 50 mA 75 ± 25 mA
Coil Voltage12 VDC24 VDC
Max. Control Current 1250 ± 100 mA 625 ± 50 mAU.S. Patent6,167,906
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROLS
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• Unitized, molded coil design.
• Coil waterproofi ng standard.
• Manual override option.
Recommended Electronic Controllers:See page 2.001.1 or our Electronics catalog.
