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Valves - Electro-proportional Controls - Pressure Controls - Proportional Pressure Reducing/Relieving - Direct Acting - Pressure Rising with Current - Drop-in

EHPR98-T38C

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

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Overview

Description

The EHPR98-T38CX is a direct-acting, spool-type, proportional, pressure reducing/relieving valve. It is a 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-T38C 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.
  • 960 hour salt spray protection.
  • Integral waterproof coil standard.
  • Optional 142 micron screen at port 2.
Pressure Ratings
Pressure rating:
  • 50.0 bar (725 psi)
Burst pressure:
  • 345 bar (5000 psi) Ports 1 and 2 pressurized
Flow Ratings
Flow rating:
  • 30.3 lpm (8 gpm)
Maximum internal leakage:
  • 50 ml/min (3 in³/min) At de-energized 34.5 bar (500 psi)
  • 100 ml/min (6 in³/min) At energized at imax 34.5 bar (500 psi)
Hysteresis per cent:
  • 4 % Of maximum control pressure
Other Ratings
Cycle life:
  • 5 million cycles
Environmental rating:
  • Ip69k
Temperature Ratings
Operating fluid temperature:
  • -40 to 149 °C (-40 to 300 °F) With HNBR seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 80 °C (-40 to 176 °F)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.32 kg (0.70 lb)
Internal wetted surface area:
  • 179 cm² (27.8 in²)
Maximum control current:
  • 1.38 A Coil 10 V
  • 1.30 A Coil 12 V
  • 0.69 A Coil 20 V
  • 0.65 A Coil 24 V
Valve inductance:
  • 94 mH Coil 12 V
  • 402 mH Coil 24 V
EHPR98-T38C_Perf_Chrt1 EHPR98-T38C_Perf_Chrt3
EHPR98-T38C_Dim_Dwg

Materials

Cartridge including Coil: Steel with hardened work surfaces. Zinc-plated exposed surfaces; HNBR O-rings standard. Coil is encapsulated, class H high temperature magnet wire, with zinc-nickel plated shell.

Ported Body: Consult Factory.

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

Cavity:
  • VC-T011
Installation type:
  • Flange mounted
Orientation restriction:
  • None
Mounting screw torque:
  • 1.2 to 1.5 N-m (0.9 to 1.1 ft-lb)
Mounting screw:
  • M4 x 12, hf p/n: 4001015 (sold separately)
Valve body:
  • Hf p/n 71570x0 (sold separately)
Seal kit:
  • SK-T011-X X = seal option
EHPR98-T38C_Order
POSITION
CODE
DESCRIPTION
EHPR98-T38CEG-H-J-KL
E
Manual Override
E
BLANK
NONE
E
M
Minimum Regulated Pressure Override, 3/16" Internal Hex
G
Screen
G
BLANK
NONE
G
S
100 Mesh Screen
H
Line Body
H
0
No Body
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
K
Coil Voltage
K
10
10 VDC
K
12
12 VDC
K
20
20 VDC
K
24
24 VDC
L
Coil Termination
L
EJ
E-Coil, AMP Jr.
L
ER
E-Coil, Deutsch

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