Symbol

Description

The EHPR98-G38XXX is a direct-acting, spool-type, proportional, pressure reducing

relieving valve. It is a 3rd generation hydraforce drop-in, flange mounted cartridge type

valve for use with mineral based or synthetic (with lubricating properties) hydraulic fluids.

The coil is an integral part of the valve and is not serviceable the regulated pressure is

proportional to the input electrical current in the pressure ranges shown.

NOTE: The standard plunger is recommended in applications with inlet pressures up to

34 bar (500 psi) that require faster response with increased volume at the control port.

Minimum volume at the control port may cause the valve to become unstablet. For

applications with inlet pressures up to 69 bar (1000 psi) and decreased volume at the

control port the damped plunger is recommended.

Features

Economical drop-in style

Mounting plate option

Several regulated pressure ranges

Retrofit option for EHPR98- T38

Quick response time

Screen option

Top-mounted connector

Low leakage

Overview

Ratings

Pr e ssur e Ratings

Pressure rating

44.8 bar (650 psi) - Note : At port 1

34.5 bar (500 psi) - Note : At port 2 (standard plunger)

69 bar (1000 psi) - Note : At port 2 (damped plunger)

34.5 bar (500 psi) - Note : At port 3

Proof pressure

207 bar (3000 psi) - Note : Ports 1, 2

54 bar (780 psi) - Note : Port 3

Burst pressure

249 bar (3625 psi) - Note : All ports pressurized

Control pressure at maximum

control current

21 bar (305 psi) - Note : EHPR98- G38A

25 bar (363 psi) - Note : EHPR98- G38B

30 bar (435 psi) - Note : EHPR98- G38C

Flow Rating s

Flow rating

23 lpm (6 gpm)

Maximum internal leakage

50 ml/min (3.1 in³/min) - Note : At 34.5 bar (500 psi) de-energized

Othe r Ratings

Cycle life

10 million cycles

Environmental rating

IP69 K

Corrosion protection

960 hour salt spray per ASTM B117

Te mpe rature Ratings

Operating fluid temperature

-40 to 149 °C (-40 to 300 ° F) - Note : HNBR

-26 to 204 °C (-15 to 400 ° F) - Note : Fluorocarbon

Storage temperature

-40 to 70 °C (-40 to 158 ° F)

Ambient temperature

-40 to 120 °C (-40 to 248 ° F)

Operating Parameters

Fluids

Mineral based or synthetic hydraulic fluid with lubricating properties

Fluid viscosity range

7.4 to 420 cSt

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38

Properties

Unit weight

0.27 kg (0.60 lb)

Internal wetted surface area

148 cm² (23.0 in²)

Electrical Parameters

Maximum control current

1.050 A - Note : At 10 V

0.0880 A - Note : At 12 V

0.720 A - Note : At 14 V

0.525 A - Note : At 20 V

0.440 A - Note : At 24 V

0.360 A - Note : At 28 V

Valve inductance

77 mH - Note : 10 V coil

118 mH - Note : 12 V coil

165 mH - Note : 14 V coil

301 mH - Note : 20 V coil

446 mH - Note : 24 V coil

680 mH - Note : 28 V coil

Coil resistance

4.83 ohm - Note : 10 V coil

7.28 ohm - Note : 12 V coil

10.05 ohm - Note : 14 V coil

18.35 ohm - Note : 20 V coil

29.54 ohm - Note : 24 V coil

40.36 ohm - Note : 28 V coil

Hysteresis

4 % - Note : At 120 Hz PWM

Performance

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38

Dimensions

Installation Specifications

Cavity

VC-G028 - Note : Standard configuration

Installation type

Flange mounted

Orientation restriction

None

Mounting screw torque

3 to 4 N-m (2.2 to 3.0 ft-lb)

Note

For retro-fitting into older drop-in cavities and other mounting options, see

"Mounting-options-for-G3-valves" technical reference

Accessories

Mounting plate

HF P/N 4595096 - Note : Use with standard VC-G028 cavity

HF P/N 4210226 - Note : Use with retrofit VC-T011 cavity

Mounting screw

M5 x 0,8 x 12 mm long, HF P/N: 4002609 (sold separately) - Note : Use with

standard VC-G028 cavity

M4 x 00.7 x 12 mm long, HF P/N: 4001015 (sold separately) - Note : Use with

retrofit VC-T011 cavity

Seal kit

SK- G028-X - Note : X=seal option

Ported test body

HF P/N: 71612X0

Order Code

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38

Model Options

EHPR98-G38DFG-H-J-KL-U

D Max Regulated Pressure

CODE DESCRIPTION

21 bar (305

psi)

25 bar (363

psi)

30 bar (435

psi)

F Plunger Option

CODE DESCRIPTION

BLANK

Standard

Vers ion

F Fast Responding

G Screen

CODE DESCRIPTION

BLANK NONE

100 Mesh

Screen

H Line Body

CODE DESCRIPTION

0 No Body

J Seal

CODE DESCRIPTION

HNBR (Hydrogenated Nitrile Butadiene

Rubber)

V Fluorocarbon

P Polyurethane

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38

K Coil Voltage

CODE DESCRIPTION

10 10 VDC

12 12 VDC

14 14 VDC

20 20 VDC

24 24 VDC

28 28 VDC

L Coil Termination

CODE DESCRIPTION

EJ E-Coil, AMP Jr.

ER E-Coil, Deutsch

EY2A

E-Coil, Metri-Pack

150.2

U Mounting Plate

CODE DESCRIPTION

BLANK None

Standard Single Valve

Plate

T Retro-Fit Plate

EHPR98-G38

hydraforc e . c om

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

hydraforc e . c om

24OCT2023 16:49

EHPR98-G38