Electro-Proportional Valves — Flow Control

PV70-31 — Spool-Type, 3-Port, Normally Open
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PV70-31 Valve

SYMBOL:
PV70-31 Valve symbol
DESCRIPTION
A solenoid-operated, electrically-variable, 3-port, normally open, pressure-compensated,
proportional flow control, spool-type, screw-in hydraulic cartridge valve. It can be used as
a priority-type flow regulator with pressure-compensated, regulated and bypass flow. It
can also be used as a restrictive-type 2-way, pressure-compensated flow regulator when
the bypass line (port 2) is blocked.

OPERATION
The PV70-31 will regulate flow out of port 3 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
• Choice of two regulated flow ranges.
• Hardened spool and cage for long life.
• Optional coil voltages and terminations.
• Efficient wet armature construction.
• Excellent linearity and hysteresis.
• Unitized, molded coil design.
• Coil waterproofing standard.
• Manual override options.

RATINGS
Operating Pressure: Inlet Port 1:240 bar (3500 psi); Ports 2 and 3:207 bar (3000 psi)
Proof Pressure: 345 bar (5000 psi)
Burst Pressure: 896 bar (13,000 psi)
Flow Rating:
Flow Rating lpm (gpm) Range A Range B
2-Ported 3-Ported 2-Ported 3-Ported
Regulated 26.5 (7.0) 30.3 (8.0) 17.0 (4.5) 17.0 (4.5)
Maximum Input -- 37.9 (10.0) -- 18.9 (5.0)
Normal Input -- 49.2(13.0) -- 26.5 (7.0)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon seals
Internal Leakage: 197 cc/min. (12 cu. in./min.) fully closed at 207 bar (3000 psi)
Electrical Parameters: (Nominal values with size 70 E-series and D-series coils)
Coil Voltage Rating (VDC) Valve Inductance(mH) Maximum
Control Current (mA)
Threshold Current (mA)
E-Coil D-Coil Flow Range A Flow Range B
12 240 200 1350±150 150±70 300±100
24 700 600 675±75 75±35 150±50
Hysteresis: ±0.9 lpm (0.25 gpm) maximum
Dither/PWM Frequency Range: 100 to 250 Hz
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. Manual override options M and G
   require Coil Nut Kits. See part numbers below. See Cartridge Installation, page 9.020.1
   for cartridge, coil and coil retainer installation. To assure proper function, coil retainer must
   be installed.
Cavity: VC10-3; See page 9.110.1_3w
Cavity Tool:CT10-3X-XX; See page 8.600.1
Seal Kit: SK10-3X-MM; See page 8.650.1 for seal kit options and appropriate seals based
   on application temperature range.
Coil Nut Kits (for Manual Override Option G): 4001214; (for 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:

PV70-30 Valve Flow chart

 

 

PV70-30 Valve Flow chart

 

DIMENSIONS:

PV70-30 Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.19 kg (0.42 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups
standard.

Standard Ported Body: Weight: 0.36 kg
(0.8 lb); Anodized high-strength 6061 T6
aluminum alloy, rated to 207 bar (3000 psi);
Ductile iron bodies available; dimensions
may differ. See page 8.010.1_3w.

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 each: 0.41 kg
(0.9 lb); Fully encapsulated with rugged
external metal shell. IP69K rated.
See page 3.400.1_70-size.

 

ORDERING CHART:

PV70-31 Ordering