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

EHPR98-T35

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

Overview

Description

This 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 an is not serviceable. The regulated pressure is proportional to the input electrical current in the pressure ranges shown

Operation

The EHPR98-T35 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: back pressure on port 3 becomes additive to the pressure setting at a 1:1 ratio

Manual Override Operation

Rotate manual override screw clockwise until desired regulated pressure is achieved

Features

  • 10, 12, 20 or 24 VDC coils.
  • 960 hour salt spray protection.
  • Economical drop-in style.
  • Several push-on termination options.
  • Higher inlet pressure option A available.
  • Manual override and screen options.

Ratings

Pressure Ratings
Supply pressure:
  • 103 bar (1500 psi) Maximum
Maximum tank port pressure:
  • 34.5 bar (500 psi)
  • 17.2 bar (250 psi) For manual override option
Control pressure at maximum control current:
  • 20.7 bar (300 psi)
Flow Ratings
Flow rating:
  • 5.7 lpm (1.5 gpm)
Hysteresis per cent:
  • 4 %
Maximum internal leakage:
  • 75 ml/min (4.58 in³/min) At de-energized, oil 25 bar (365 psi) 32 cSt (150 SUS)
  • 125 ml/min (7.63 in³/min) Energized at imax, at 25 bar (365 psi)
Temperature Ratings
Operating fluid temperature:
  • -40 to 120 °C (-40 to 250 °F)
Storage temperature:
  • -40 to 80 °C (-40 to 176 °F)
Ambient temperature:
  • -40 to 80 °C (-40 to 176 °F)
Other Ratings
Corrosion protection:
  • 960 hour Salt-spray

Operating Parameters

Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt (50 to 2000 SUS)
Maximum operating contamination level:
  • 20/18/14 per ISO 4406

Properties

Unit weight:
  • 0.20 kg (0.44 lb)

Electrical Parameters

Maximum control current:
  • 1.38 A 10 V
  • 1.30 A 12 V
  • 0.69 A 20 V
  • 0.65 A 24 V
Note:
  • For other voltages, consult HydraForce
Dither PWM frequency:
  • 100 Hz
Valve inductance:
  • 80 mH 12 V coil

Performance

EHPR98-T35_Perf_Chrt1 EHPR98-T35_Perf_Chrt2 EHPR98-T35_Perf_Chrt3

Dimensions

EHPR98-T33_Dim_Dwg

Materials

Materials

Cartridge including Coil: Weight: 0.20 kg (0.44 lb); 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 Test Body: Consult Factory.

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

Order Code

POSITION
CODE
DESCRIPTION
EHPR98-T35DEG-H-J-KL
D
Inlet Pressure Range
D
A
1500 to 3500 psi Inlet Pressure
D
BLANK
0 to 1500 psi Inlet Pressure
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
EHPR98-T35_Order