EHPR98-T38

PROPORTIONAL PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

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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

Manual Override Operation

Rotate manual override screw clockwise until desired regulated pressure is achieved

Features

10, 12, 20 or 24 VDC coils.
1000-hour salt spray protection.
Economical drop-in style.
Several push-on termination options.
Integral waterproof coil standard.
Optional 142 micron screen at port 2.

Ratings

Pressure Ratings

Pressure rating:

241 bar (3500 psi) Port 2
34.5 bar (500 psi) Port 3
17.2 bar (250 psi) Port 3 - for manual override option

Burst pressure:

345 bar (5000 psi) Ports 1 and 2 pressurized

Control pressure at maximum control current:

30 bar (500 psi)

Flow Ratings

Flow rating:

18.9 lpm (5.0 gpm)

Maximum internal leakage:

50 ml/min (3 in³/min) De-energized, at 34.5 bar (500 psi)
100 ml/min (6 in³/min) Energized at imax, 34.5 bar (500 psi)

Hysteresis per cent:

5 % Of maximum control pressure ( PWM) 100 Hz

Other Ratings

Cycle life:

One 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:

173 cm² (26.8 in²) EHPR98-T38
203 cm² (31.4 in²) EHPR98-T38M

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:

80 mH

Performance

Dimensions

Materials

Cartridge including Coil: Weight: 0.32 kg. (0.70 lbs.); 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