Electro-Proportional Valves — Pressure Control

EHPR98-T38B — Proportional, Reducing / Relieving, Drop-in
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EHPR98-T38B Valve

EHPR98-T38B Valve symbol
A drop-in, flange mount, direct-acting, hydraulic pressure reducing/relieving valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. The E-coil is an integral part of the valve assembly, and cannot be replaced or field-serviced.

The EHPR98-T38B allows free flow from 1 to 3 when no current is applied to the coil. When the coil is energized, 2 is connected to 1. Increasing current applied to the coil will increase the control (reduced) pressure proportionally. If pressure at 1 exceeds the setting induced by the coil, pressure from 1 is relieved to 3.
Note: Operation of manual override option: Rotate manual override screw colockwise until desired regulated pressure is achieved.

• 10, 12, 20 or 24 VDC coils.
• 1000-hour salt spray protection.
• Economical drop-in style.
• Several push-on termination options.
• Integral waterproof coil standard.
• Optional 142 micron screen at port 2.

Max. Inlet Pressure: 241 bar (3500 psi) at Port 2; 57 bar (820 psi) at Port 1;
   34 bar (500 psi) at Port 3
Burst Pressure: 379 bar (5500 psi) (Ports 1 and 2 pressurized).
Max. Internal Leakage: Energized: 393 ml/min.(24 cu. in/min.) at 241 bar (3500 psi);
   De-energized: 100 ml/min. (6 cu. in/min.) 241 bar (3500 psi)
Control Pressure at Max. Control Current: 56.6 bar (820 psi)
Max. Control Current: 1.38 amps for 10 VDC coil; 1.30 amps for 12 VDC coil;
   0.69 amps for 20 VDC coil; 0.65 amps for 24 VDC coil
Resistance: 4.3 ohm (10V), 5.2 ohm (12V), 17.5 ohm (20V), 20.9 ohm (24V)
Inductance: 80 mH (12V)
Hysteresis: at 100 Hz PWM: 5% of max. control pressure
Rated Flow: 18.9 lpm (5.0 gpm)
Cycle Life: One million cycles
Oil Operating Fluid Temperature: -40° to 149°C (-40° to 300°F)
Storage Temperature: -40° to 70°C (-40° to 160°F)
Ambient Air Temperature: -40° to 80°C (-40° to 176°F)
Environmental Rating: IP69K
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: Flange Mount
Mounting Screws: M4 x 0.7 x 12 Long; Part No. 4001015 (not provided with valve)
Cavity: VC-T011; See page 9.111.1
Cavity Tool: CT-T011R0-x-G; See page 8.600.1
Seal Kit: SKT011-N; SK-T011-V; See page 8.650.1

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




EHPR98-T38B Valve Performance Chart


EHPR98-T38B Valve Performance Chart


EHPR98-T38B Valve Performance Chart

EHPR98-T38B Valve Dimensions



Cartridge including Coil:
Weight: 0.32 kg (0.70 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; HNBR O-rings standard. Coil is encapsulated, class H high temperature magnetwire, with zinc-nickel plated shell.

Ported Test Body: Consult Factory.

Mounting Screws: Must be ordered separately; Part no. 4001015



EHPR98-T38B Ordering Chart