EHPR98-T35 Proportional Reducing/Relieving

USASI/ISO:

SYMBOLS

2.972.1

PERFORMANCE

CURRENT amps

PRESSURE bar/psi

Reducing Pressure vs. Current

Inlet: 25 bar/365 psi; 100 Hz PWM

Reduced Pressure  to ~

2.8/40

5.5/80

8.3/120

11.0/160

13.8/200

16.5/240

19.3/280

22.1/320

0.2 0.4 0.6 1.00.8 1.41.2

FLOW lpm/gpm

PRESSURE bar/psi

Pressure Drop vs. Flow

Cartridge Only

1 to 3 —— ; 2 to 1 - - - -

1.7/25

3.4/50

5.2/75

6.9/100

8.6/125

10.3/150

12.1/175

0.9

0.25

1.9

0.50

2.8

0.75

3.8

1.00

4.7

1.25

5.7

1.50

DESCRIPTION

A direct-acting, spool-type, drop-in-style, ﬂ ange-mounted, pressure reducing/reliev-

ing valve, which can be inﬁ nitely adjusted across a prescribed range using a variable

electric input. Pressure output is proportional to DC current input. The Ecoil is an

integral part of the valve assembly, and cannot be replaced or ﬁ eld-serviced.

OPERATION

The EHPR98-T35 allows free ﬂ ow from ➀ to ➂ when no current is applied to the coil.

When the coil is energized,

➁ is connected to ➀. Increasing current applied to the coil

will increase the control (reduced) pressure proportionally. If pressure at

➀ exceeds

the setting induced by the coil, pressure from

➀ is relieved to ➂.

Note: Back pressure on port

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

FEATURES

• Economical drop-in style. • Several push-on termination options.

• Integral waterproof coil standard. • 1000-hour salt spray protection.

• 10, 12, 20 or 24 VDC coils.

RATINGS

Maximum 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.

Maximum Tank Pressure: 34.5 bar (500 psi);

with Manual Override Option: 17.2 bar (250 psi)

Control Pressure at Maximum Control Current: 20.7 bar (300 psi)

Maximum 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: 4.2Ω (10V); 5.1Ω (12V); 17.0Ω (20V); 19.3Ω (24V)

Inductance: 80 mH (12V); Hysteresis: Less than 4% with 100 Hz PWM

Flow Rating: 5.7 lpm (1.5 gpm)

Maximum 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);

400 ml/minute (24.4 cu. in. minute) 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

ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS

Relieving Pressure ➀ to ➂

Typical Relieving/Reducing Pressure vs. Flow Characteristic

Inlet: 25 bar/365 psi ——— ; Inlet: 241 bar/3500 psi - - - - -

100 Hz PWM (Both Directions); Note: Curves overlap on Relieving Pressure (LH) side of graph

FLOW lpm/gpm

3.8

1.00

4.7

1.25

5.7

1.50

2.8

0.75

1.9

0.50

0.9

0.25

0 0.9

0.25

1.9

0.50

2.8

0.75

3.8

1.00

4.7

1.25

5.7

1.50

Reducing Pressure ➁ to ➀

0 mA

RELIEF PRESSURE bar/psi

REDUCING PRESSURE bar/psi

6.9/100

3.4/50

10.3/150

24.1/350

27.6/400

20.7/300

17.2/250

13.8/200

6.9/100

3.4/50

10.3/150

24.1/350

27.6/400

20.7/300

17.2/250

13.8/200

1300 mA

1000 mA

800 mA

600 mA

400 mA

HYDRAFORCE

.com

Blue rectangles are links to other catalog pages.

PERFORMANCE

EHPR98-T35

2.972.2

(continued)

DIMENSIONS

0.1

FREQUENCY Hz

Typical Frequency Response Curves

Inlet: 25 bar/365 psi; DC Current; Regulated Port Blocked

Signals: 40% ±10% ——; 50% ±25% — —; 70% ±20% – – –; 80% ±10% - - - -

1.0 10.0 50.0

180

135

PHASE ANGE degrees

-4

-3

-2

-1

-5

-6

-7

-8

MAGNITUDE dB

3.4/50

6.9/100

10.3/150

13.8/200

17.2/250

20.7/300

24.1/350

PRESSURE bar/psi

TIME seconds

0.50 1.00 1.50 2.00 2.50 3.000

Typical Step Response Curve

Inlet 25 bar/365 psi; Regulated Port Blocked

Pressure

DC Current

Drop-In-Style

Valve

MATERIALS

Cartridge including Coil:

Weight: 0.20 kg. (0.44 lbs.)

Steel with hardened work

surfaces. Zinc-Nickel 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

EHPR98-T35 __ __ __- __ __ - __ - __ __ __ __ __

TO ORDER

Voltage

10 10 VDC

12 12 VDC

20 20 VDC

24 24 VDC

Termination

ER Deutsch DT04-2P

EJ Amp Junior Timer

Seals

N Hydrogenated Nitrile (HNBR)

V Fluorocarbon

Other voltages are available. Consult factory.

HYDRAFORCE

.com

Porting

Cartridge Only 0

Option

None

(Blank)

Manual Override M

Inlet Pressure

0 to 103 bar

(0 to 1500 psi)

(Blank)

103 to 241 bar

(1500 to 3500 psi) A

1.09

27.6

1.73

43.9

2.13

54.1

1.31

33.3

INCH

MILLIMETRE

2.15

54.6

0.47

11.9

1.12

28.4

Mounting

Screw

Torque:

0.9–1.1 ft-lbs

(1.2–1.5 Nm)

Manual

Override

Option

0.25

6.4

40°

Screen

Option

Recommended Electronic Controllers:

See page 2.001.1 or our Electronics catalog.

Note: For additional Frequency Response or Step Response

information, consult factory.

Screen Option

None

(Blank)

142µ on Inlet Port 2 S

Diode

(Blank) None

Z Zener Diode,

Bidirectional

Blue rectangles are links to other catalog pages.