EHPR98-G35 Proportional Reducing/Relieving
ISO SYMBOL
2.972.3
PERFORMANCE
CURRENT amps
PRESSURE bar/psi
Reducing Pressure vs. Current
100 Hz PWM (12V coil)
Reduced Pressure Port 2
5.2/75
6.9/100
8.6/125
10.3/150
13.8/200
19.0/275
20.7/300
22.4/325
0.2 0.4 0.6 1.00.8
17.2/250
15.5/225
12.1/175
3.4/50
1.7/25
FLOW lpm/gpm
PRESSURE bar/psi
Pressure Drop vs. Flow
Cartridge Only
2 to 1 ; 1 to 3
1.7/25
3.4/50
5.2/75
6.9/100
8.6/125
0.95
0.25
1.9
0.50
2.8
0.75
3.8
1.0
10.3/150
5.7
1.5
4.7
1.25
DESCRIPTION
A direct-acting, spool-type, proportional, pressure reducing/relieving valve. It is a third
generation HydraForce 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 cannot be replaced or field-serviced. The regulated pres-
sure is proportional to the input electrical current in the pressure ranges shown.
OPERATION
The EHPR98-G35 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. • Quick response time.
• Mounting plate option. • Inlet screen option.
• Compact size. • Top-mounted connector.
• Retrofit option for EHPR98-T35. • Low leakage.
RATINGS
Pressure Rating: 45 bar (650 psi) at all ports
Proof Pressure: 54 bar (780 psi) at port 3; 345 bar (5000 psi) at ports 1 and 2
Burst Pressure: 258 bar (3750 psi) all ports pressurized
Flow Rating: 5.7 lpm (1.5 gpm)
Maximum Internal Leakage: De-energized: 45 ml/min (2.7 cu. in./min) @ 24 bar
(350 psi); Energized @ Imax: 45 ml/min (2.7 cu. in./min) @ 24 bar (350 psi);
With Option A: De-energized: 200 ml/min (12.2 cu.in./min) @ 241 bar (3500 psi)
Energized @ Imax: 200 ml/min (12.2 cu.in./min) @ 241 bar (3500 psi)
Cycle Life: 10 million cycles
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; -54 to 107°C (-65 to 225°F) with
polyurethane seals.
Maximum Control Current: 1.3 amps for 10 VDC coil; 0.94 amps for 12 VDC coil;
0.78 amps for 14 VDC coil; 0.56 amps for 20 VDC coil ; 0.47 amps for 24 VDC coil;
0.39 amps for 28 VDC coil.
Control Pressure at Maximum Control Current: 20 bar (290 psi)
Hysteresis: 4% with 120 Hz PWM
Resistance: 4.8 ohm (10V), 7.2 ohm (12V), 10.0 ohm (14V), 18.3 ohm (20V);
29.5 ohm (24V), 40.3 ohms (28V)
Inductance: 68 mH (10V), 104 mH (12V), 152 mH (14V), 284 mH (20V),
433 mH (24V), 645 mH (28V)
Environmental Rating: IP69K; 1000-hour salt spray per ASTM B117
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 Mounted. See page 8.525.1
Cavity: VC-G027 (Standard Configuration); VC-T009 (Retrofit Application);
See page 9.111.1
Cavity Tools: CT-G027 (Standard Configuration); CT-T009 (Retrofit Application);
See page 8.600.1
Seal Kit: SK-G027-X; See page 8.650.1
®
ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS
HYDRAFORCE
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PERFORMANCE
EHPR98-G35
2.972.4
(continued)
DIMENSIONS
6
4
2
0
-2
-4
-6
-8
180
90
FREQUENCY (Hz)
Typical Frequency Response Curves
24 bar (350 psi) Inlet Pressure
DC Current, Regulated Port Blocked
Signal 40% ±10%
Signal 60% ± 25%
Signal 70% ± 20%
Signal 80% ±10%
10 50
45
0
135
GAIN (dB)
PHASE (degrees)
8
1.0
Drop-In-Style
Valve
MATERIALS
Cartridge including Coil:
Weight: 0.26 kg. (0.57 lbs.)
Steel with hardened work
surfaces. Zinc-nickel plated
exposed surfaces. HNBR
seals standard. Coil is
encapsulated, Class N high-
temperature magnet wire,
with zinc-nickel plated shell.
Ported Body: Part No. 7161120
Mounting Screws (not
provided with valve):
M5 x 0.8 x 12 mm Long,
Part No. 4002609 (with
standard VC-G027 cavity);
M4 x 0.7 x 12 Long; Part No.
4001015 (with retrofit applica-
tion VC-T009 cavity).
EHPR98-G35 __- __ - __ - __ __ __ __ __ - __
TO ORDER
®
1.63
41.3
0.81
20.6
1.40
35.6
INCH
MILLIMETRE
2.72
69.0
1.21
30.7
Mounting Screw Torque
(M5) 2.2 - 3.0 ft-lbs (3–4 Nm)
(M4) 0.9 - 1.1 ft-lbs (1.2-1.5 Nm)
Screen
Option
1.27
32.3
ER
Connector
Shown
0.14
3.4
0.80
20.3
2.12
53.8
TYP
2.62
66.5
0.25
6.4
2.00
50.8
0.28
7.2
TYP
0.75
19.1
0.09
2.3
SPOTFACE
2.50
63.5
Mounting
Screws Sold
Separately
ER Connector Shown;
EJ and EY2A also available; height will differ
Relieving Pressure 1 to 3
Typical Relieving3Reducing Pressure vs. 3low Characteristic
Typical Relieving Pressure at Various 3s of Maximum Control Current
3nlet: 21 bar3300 psi; 100 Hz PWM (Both 3irections)
3L3W lpm3gpm
5.7
1.5
4.7
1.25
3.8
1.0
2.8
0.75
0
0.9
0.25
1.9
0.50
2.8
0.75
4.7
1.25
Reducing Pressure 2 to 1
803 Max.
503 Max.
03 Max.
PR3 SS3 R3 (bar3psi)
6.93100
0
3.4350
10.33150
13.93200
17.23250
20.73300
24.13350
1.9
0.50
3.8
1.0
403 Max.
27.63400
0.9
0.25
5.7
1.50
603 Max.
1003 Max.
0
6.93100
13.83200
17.23250
20.73300
24.13350
PR3 SS3 R3 (bar3psi)
T3M3 seconds
1.061.041.00 1.020.980.96
Typical Step Response Curve - 3N T3M3
3nlet Pressure 21 bar3300 psi
3C Current; Regulated Port Blocked
Pressure
Current
3.4350
10.33150
1.00
0.50
C3 RR3 NT (amps)
0
6.93100
13.83200
17.23250
20.73300
24.13350
PR3 SS3 R3 (bar3psi)
T3M3 seconds
3.063.02 3.043.002.982.96
Typical Step Response Curve - 333 T3M3
3nlet Pressure 34.5 bar3500 psi
3C Current; Regulated Port Blocked
Pressure
Current
10.33150
3.4350
Voltage
10 10 VDC
14 14 VDC
12 12 VDC
20 20 VDC
24 24 VDC
28 28 VDC
Termination
ER Deutsch DT04-2P
EJ Amp Junior Timer
EY2A Metripack 150.2
Diode
(Blank) None
Z Zener Diode,
Bidirectional
Seals
Hydrogenated Nitrile (HNBR) G
Fluorocarbon V
Polyurethane P
Porting
Cartridge Only 0
SAE 6 6T
Inlet Port Screen
None
(Blank)
142μ on Inlet Port 2 S
Mounting Plate
(Blank) None
G Standard Single
Plate Valve
T Retrofit Plate
HYDRAFORCE
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®
HYDRAFORCE
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