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EHPR98-G38

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

Overview

Description

The ehpr98-g38xx 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

Operation

The EHPR98-G33 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

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.

Ratings

Pressure Ratings
Pressure rating
34.5 bar (500 psi) At all ports
Proof pressure
207 bar (3000 psi) Port 1
207 bar (3000 psi) Port 2
54 bar (780 psi) Port 3
Burst pressure
249 bar (3625 psi) All ports pressurized
Control pressure at maximum control current
21 bar (305 psi) EHPR98-G33A
25 bar (363 psi) EHPR98-G33B
30 bar (435 psi) EHPR98-G33C
Flow Ratings
Flow rating
23 lpm (6 gpm)
Maximum internal leakage
50 ml/min (3.1 in³/min) At 34.5 bar (500 psi) de-energized
Other Ratings
Cycle life
10 million cycles
Environmental rating
Ip69k
Corrosion protection
1000 hour salt spray per ASTM b117
Temperature Ratings
Maximum operating fluid temperature
-40 to 149 °C (-40 to 300 °F) HNBR
-26 to 204 °C (-15 to 400 °F) 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

Properties

Cartridge weight
0.27 kg (0.60 lb)
Internal wetted surface area
148 cm² (23.0 in²)

Electrical Parameters

Maximum control current
1.050 A At 10 V
0.0880 A At 12 V
0.720 A At 14 V
0.525 A At 20 V
0.440 A At 24 V
0.360 A At 28 V
Valve inductance
77 mH 10 V coil
118 mH 12 V coil
165 mH 14 V coil
301 mH 20 V coil
446 mH 24 V coil
680 mH 28 V coil

Performance

EHPR98-G38_Perf_Chrt2 EHPR98-G38_Perf_Chrt3 EHPR98-G38_Perf_Chrt1

Dimensions

EHPR98-G38_Dim_Dwg

Materials

Materials

Cartridge Including Coil: Weight: 0.27 kg. (0.60 lbs.) Steel with hardened work surfaces. Zinc-nickel plated exposed surfaces. HNBR seals standard. Coil is encapsulated, Class M high-temperature magnet wire, with zinc-nickel plated shell.

Ported Test Body: Part No. 7161210

Mounting Screws: Must be ordered separately; M5 x 0.8 x 12 mm Long, Part No. 4002609 (with standard VC-G028 cavity); M4 x 0.7 x 12 Long; Part No. 4001015 (with retrofit application VC-T011 cavity).

Installation Specifications

Cavity
VC-G028
Installation type
Flange mounted
Orientation restriction
None
Mounting screw torque
3 to 4 N-m (2.2 to 3 ft-lb)
Note
For retro-fitting into older drop-in cavities and other mounting options, see "g3_mounting_options" technical reference

Accessories

Mounting plate
Hf p/n 4595096
Mounting screw
M5 - 0,8 x 12mm long, hf p/n: 4002609 (sold separately)
Valve body
Hf p/n 71612x0 (sold separately) for retro-fitting into older drop-in cavities and other mounting options, see "g3_mounting_options" outline drawing.
Seal kit
SK-G028-X X = seal option

Order code

POSITION
CODE
DESCRIPTION
EHPR98-G38G-H-J-KL
D
Max Regulated Pressure
D
A
21 bar (305 psi)
D
B
25 bar (363 psi)
D
C
30 bar (435 psi)
G
Screen
G
BLANK
NONE
G
S
100 Mesh Screen
H
Line Body
H
0
No Body
J
Seal
J
G
HBNR (Hydrogenated Nitrile Butadiene Rubber)
J
V
Fluorocarbon
J
P
Polyurethane
K
Coil Voltage
K
10
10 VDC
K
12
12 VDC
K
14
14 VDC
K
20
20 VDC
K
24
24 VDC
K
28
28 VDC
L
Coil Termination
L
EJ
E-Coil, AMP Jr.
L
EJ/Z
E-Coil, AMP Jr. with Zener Diode
L
ER
E-Coil, Deutsch
L
ER/Z
E-Coil, Deutsch with Zener Diode
L
EY2A
E-Coil, Metri-Pack 150.2
L
EY2A/Z
E-Coil, Metri-Pack 150.2 with Zener Diode
EHPR98-G38_Order