EHPR98-T33 Proportional Reducing/Relieving

USASI/ISO:

SYMBOLS

2.971.1

PERFORMANCE

CURRENT amps

PRESSURE bar/psi

Reducing Pressure vs. Current

Inlet: 241 bar/3500 psi; 100 Hz PWM

Reducing Pressure ➁ to ➀

6.9/100

13.8/200

20.7/300

27.6/400

34.5/500

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

0.8

0.2

1.5

0.4

2.3

0.6

3.0

0.8

3.8

1.0

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-T33 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. • Integral waterproof coil standard.

• 1000-hour salt spray protection. • 10, 12, 20 or 24 VDC coils.

• Several push-on termination options.

RATINGS

Maximum Inlet Pressure: 241 bar (3500 psi)

Common Port Burst Pressure: One cycle at 158 bar (2300 psi) on all ports

simultaneously pressurized

Tank Port (

➂) Pressure: 34.5 bar (500 psi) maximum for 100,000 cycles

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: 4.2 ohm (10V), 5.1 ohm (12V), 17.0 ohm (20V), 19.3 ohm (24V)

Inductance: 80 mH (12V)

Hysteresis: Less than 3% with 100 Hz PWM

Flow Rating: 3.8 lpm (1.0 gpm)

Step Response: T

ON <30 ms; TOFF <12 ms

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

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

Typical Relieving Pressure at Various %s of Maximum Control Current

Inlet: 241 bar/3500 psi; 100 Hz PWM (Both Directions)

FLOW lpm/gpm

3.8

1.00

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

Reducing Pressure ➁ to ➀

100% Max. Control Current

75% Max. Control Current

50% Max. Control Current

25% Max. Control Current

0% Max. Control Current

% of MAXIMUM RELIEF PRESSURE

% of MAXIMUM REDUCING PRESSURE

100

125

100

125

HYDRAFORCE

.com

Blue rectangles are links to other catalog pages.

PERFORMANCE

EHPR98-T33

2.971.2

(continued)

DIMENSIONS

0.1

FREQUENCY Hz

Typical Frequency Response Curves

Inlet: 241 bar/3500 psi; Regulated Port Blocked

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

1.0 10.0 50.0

180

135

PHASE ANGE degrees

-4

-3

-2

-1

-5

-6

-7

-8

MAGNITUDE dB

6.9/100

13.8/200

20.7/300

27.6/400

34.5/500

41.4/600

PRESSURE (bar/psi)

TIME seconds

0.450.400.350.300.250.15 0.200.100.050 0.50

Typical Step Response Curve

Inlet 241 bar/3500 psi; Regulated Port Blocked

Pressure

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-T33 __ __ - __ __ - __ - __ __ __ __ __

TO ORDER

Voltage

10 10 VDC

12 12 VDC

20 20 VDC

24 24 VDC

Termination

ER Deutsch DT04-2P

EJ Amp Junior Timer

Diode

(Blank) None

Z Zener Diode,

Bidirectional

Other voltages

are available.

Consult factory.

Seals

Hydrogenated Nitrile (HNBR) N

Fluorocarbon V

Polyurethane P

HYDRAFORCE

.com

Porting

Cartridge Only 0

Screen Option

None

(Blank)

142µ on Inlet Port 2 S

Recommended Electronic Controllers:

See page 2.001.1 or our Electronics catalog.

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

None

(Blank)

Manual Override M