Electro-Proportional Valves — Pressure Control

EHPR98-T35 — Proportional, Reducing / Relieving, Drop-in
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EHPR98-T35 Valve

SYMBOL:
EHPR98-T35 Valve symbol

 

DESCRIPTION
A drop-in, flange mount, direct-acting, hydraulic pressure reducing/relieving valve, which
can be infinitely adjusted across a prescribed range using a variable electric input. Pressure
output is proportional to DC current input. The E-coil is an integral part of the valve assembly,
and cannot be replaced or field-serviced.

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 ? becomes additive to the pressure
setting at a 1:1 ratio.

FEATURES
• 10, 12, 20 or 24 VDC coils.
• 1000-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
Max. Inlet Pressure: 103 bar (1500 psi); If higher inlet pressure is required
   (103 bar/1500 psi to 241 bar/3500 psi) select the “A” option in the model code.
Max. Tank Pressure: 34.5 bar (500 psi); with Manual Override Option: 17.2 bar (250 psi)
Control Pressure at Max. Control Current: 20.7 bar (300 psi)
Max. Control Current: 1.38 amps for 10 VDC coil; 1.30 amps for 12 VDC coil;
   0.69 amps for 20 VDC coil; 0.65 amps for 24 VDC coil
Resistance: 4.2 ohm (10V), 5.1 ohm (12V), 17.0 ohm (20V), 19.3 ohm (24V)
Inductance: 80 mH (12V)
Hysteresis: less than 4% with 100 Hz PWM
Rated Flow: 5.7 lpm (1.5 gpm)
Max. Internal Leakage:
   De-energized: 75 ml/minute (4.58 cu. in./minute) at 25 bar (365 psi);
   200 ml/minute (12.2 cu. in minute) at 241 bar (3500 psi)
   Energized at I-Max.: 125 ml/minute (7.63 cu. in./minute) at 25 bar (365 psi);
   For Option A (higher inlet pressure):
   De-energized: 200 ml/min (12.2 cu.in./min at 241 bar (3500 psi);
   Energized at I-Max: 400 ml/min (24.4 cu.in./min.) at 241 bar (3500 psi).
Temperature: -40° to 120°C (-40° to 250°F) with standard Buna N seals
Ambient Air Temperature: -40° to 80°C (-40° to 176°F)
Environmental Rating: IP69K
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: Flange Mount
Mounting Screws: M4 x 0.7 x 12 Long; Part No. 4001015 (not provided with valve)
Cavity: VC-T009; See page 9.111.1; Cavity Tool: CT-T009R0-x-G; See page 8.600.1
Seal Kit: SKEHPR98-T3x; See page 8.650.1

RECOMMENDED ELECTRONIC CONTROLLERS
The EVDR Series controllers are recommended for use with most HydraForce proportional valves.
These newer electronic controllers are versatile, reliable, and easily configured and customized for
a wide range of applications. See the EVDR Product Selection Guide.
For other Electronic Controllers, see page 2.001.1_pdf



 

 


PERFORMANCE:

EHPR98-T35 Valve Performance Chart

 


EHPR98-T35 Valve Performance Chart

 


EHPR98-T35 Valve Performance Chart
DIMENSIONS:

EHPR98-T33 Valve Dimensions

 



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 magnetwire, with zinc-nickel plated shell.

Ported Test Body: Consult Factory.

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

 

ORDERING CHART:

EHPR98-T35 Ordering Chart