Electro-Proportional Valves — Flow Control

PFR70-33J — Flow Regulator, Normally Closed, Priority Bypass

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Attention Manifold Designers:
To obtain these high flow capabilities using proportional flow controls and compensators, optimized cavity drillings
are required.
Please consult factory.

DESCRIPTION
A pressure-compensated electrically-variable three-port flow regulator that is a priority bypass-type control. This combination valve uses a PV70-33x proportional cartridge and an EC12-40 compensator.

OPERATION
The PFR70-33x-J will bypass all flow when de-energized at the pressure compensator spring value. When energized, this proportional valve/compensator package will regulate flow out of port 2, regardless of system working pressure, with an increasing current applied to the solenoid.

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.
• Screw-in manual override option.

RATINGS
Operating Pressure: 207 bar (3000 psi)
Pressure Rise: Pressure at 1 begins to rise higher than the compensating pressure differential when bypass flow exceeds 41.6 lpm (11 gpm)
Internal Leakage: 410 cc/min. (25 cu. in./min.) fully closed at 207 bar (3000 psi) out port 2
Electrical: 2 standard voltage ratings:

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

PERFORMANCE:
Priority Flow Delivered out Port 2; 24 volt coil used (for 12 volt coils, double the amp values shown);
130 Hz Dither; PWM Control

DIMENSIONS:

MATERIALS:

Cartridge: Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and back-ups standard.

Standard Ported Body: Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ. Consult factory.

70-Size D-Coil:
See page 3.200.1_70-size.

70-Size E-Coil:
See page 3.400.1_70-size.

Package Weight: 2.72 kg. (6 lbs.)

Seal Kit: SK10-3x-MM (PV valve)
SK12-4x-TMB (EC valve)

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