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.

Ratings

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)

Operating Parameters

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

Properties

Unit weight:

0.32 kg (0.70 lb)

Internal wetted surface area:

179 cm² (27.8 in²)

Electrical Parameters

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

Performance

Dimensions

Materials

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 magnet wire, with zinc-nickel plated shell.

Ported Body: Consult Factory.

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