TS08-27 Proportional Electrohydraulic Relief Valve

DESCRIPTION

A screw-in, cartridge-style, pilot-operated, spool-type proportional electrohydraulic

pressure relief valve, which can be infinitely adjusted across a prescribed range using

a variable electric input. Pressure output is inversely proportional to DC current input.

This valve is intended for use as a pressure limiting device in demanding applications.

OPERATION

The TS08-27 blocks flow from 1 to 2 until sufficient pressure is present at 1 to open

the valve by overcoming the preset induced spring force. With no current applied,

the valve will relieve at ±50 psi of the spring maximum. Applying current to the coil

reduces the induced spring force thereby reducing the valve setting. The regulated

pressure is inversely proportional to the input electrical current.

Note: This valve is ideal for hydraulic fan drive applications. Consult factory for

electronic controllers specifically designed for fan drive applications.

FEATURES

• 12 and 24 volt coils standard. • Industry common cavity.

• Hardened parts for long life.

RATINGS

Maximum Operating Pressure: 241 bar (3500 psi)

Electrical Parameters:

D-Coil E-Coil

10 VDC 12 VDC 20 VDC 24 VDC 12 VDC 24 VDC

Max Control Current

(amperes)

1.50 1.31 0.85 0.65 1.40 0.70

Resistance (Nominal)

(ohms)

3.1 5.4 12.2 21.7 5.4 21.7

Relief Pressure Range from Zero to Maximum Control Current: A: 207–6.9 bar

(3000–100 psi) B: 138–6.9 bar (2000–100 psi) C: 68.9–6.9 bar (1000–100 psi)

Rated Flow: 24.6 lpm/6.5 gpm; P = 13.8-17.2 bar (200-250 psi), cartridge only;

port 1 to 2 coil energized

Maximum Pilot Flow: 0.76 lpm (0.2 gpm)

Hysteresis at PWM 200 Hz (% of max pressure): A: 3.2 B: 3.0 C: 4.8

Flow Path: Free Flow: 1 to 2 coil energized; Relieving: 1 to 2 coil de-energized

Pressure Rise: A: 0.48 bar/lpm (26.5 psi/gpm(; B: 0.36 bar/lpm (20 psi/gpm)

C: 0.46 bar/lpm (25 psi/gpm)

Temperature: -40 to 120°C (-40 to 250°F) with standard Buna N seals

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 Recommendation: When possible, the valve should be mounted below

the reservoir oil level. This will maintain oil in the armature preventing trapped air

instability. If this is not feasible, mount the valve horizontally for best results.

Cavity: VC08-2; See page 9.108.1; Cavity Tool: CT08-2XX; See page 8.600.1

Seal Kit: SK08-2X-B; See page 8.650.1

ISO SYMBOL

2.860.1

PERFORMANCE

ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS

U.S.

Patents

6,267,350

7,137,406

TYPICAL RELIEF PRESSURE VS. FLOW CHARACTERISTIC

Typical Relieving Pressure Port 1 to Port 2 at No Current Applied

With Constant Flow 7.1 lpm/2 gpm; Cartridge in Body

FLOW (LPM/GPM)

7.6/

2.0

11.4/

3.0

15.1/

4.0

18.9/

5.0

22.7/

6.0

26.5/

7.0

3.8/

1.0

PRESSURE (BAR/PSI)

27.6/400

55.1/800

82.7/1200

110.3/1600

137.9/2000

165.5/2400

193.0/2800

220.6/3200

248.2/3600

Range A

Range B

Range C

PRESSURE DROP VS. FLOW CHARACTERISTIC

Flow from Port 1 to Port 2 with Coil Energized,

at Maximum Set Current

PRESSURE (BAR)

PRESSURE (PSI)

FLOW (GPM)

FLOW (LPM)

0 2.0 3.0 4.0 5.0 6.0 7.01.0

0 3.8 7.6 11.4 15.1 18.9 22.7 26.5

100

125

150

175

200

225

1.7

3.4

5.2

6.9

8.6

10.3

12.1

13.8

15.5

Cartridge, Body & Line

Body & Line

HYDRAFORCE

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Blue rectangles are links to other catalog pages.

DIMENSIONS

MATERIALS

Cartridge: Weight: 0.15 kg. (0.33 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Standard Ported Body: Weight:

0.16 kg. (0.35 lbs.) Anodized

high-strength 6061 T6 aluminum

alloy, rated to 207 bar (3000 psi).

Ductile iron bodies available;

dimensions may differ.

See page 8.008.1

EHPR Series Coils:

D-Coil: Weight: 0.11 kg. (0.25 lbs.)

Unitized thermoplastic encapsulat-

ed, high temperature magnetwire.

See page 3.200.1

E-Coil: Weight: 0.14 kg. (0.3 lbs.)

Fully encapsulated with rugged

external metal shell. Rated up to

IP69K with integral connectors.

See page 3.400.1

TO ORDER

TS08-27

2.860.2

TS08-27 __ __ - __ - __ __ __ __

Porting

Cartridge Only 0

SAE 6 6T

3/8 in. BSP* 3B

*BSP Body; U.K. Mfr. Only

Voltage

0 Less Coil

10 10 VDC

12 12 VDC

20 20 VDC

24 24 VDC

0.88

ACROSS

22.2

INCH

MILLIMETRE

2.25

57.3

* BSP BODY

55.9 mm

1.09

27.7

FLATS

TORQUE

4–5 ft-lbs

(5.4–6.8 Nm)

max.

0.88

ACROSS

22.2

FLATS

TORQUE

18–20 ft-lbs

(24.4–27 Nm)

max.

D-Coil

View

E-Coil

View

1.34

34.0

1.46

37.1

1.23

31.2

1.23

31.2

DIA.

0.60

15.2

0.28

7.1

1.62

41.1

0.13

3.3

2.00

50.8

1.50

38.1

(continued)

Maximum

Operating Pressure

207 bar (3000 psi) A

138 bar (2000 psi) B

70 bar (1000 psi) C

D-Coil Terminations

DR Integral Deutsch

DS Dual Spades (J858a)

DG DIN 43650

DL Leadwires (2)

DL/W Leads w/Weatherpak

Connectors

E-Coil Terminations

ER Deutsch DT04-2P

(IP69K Rated)

Coils with internal diode are

available. Consult factory.

PERFORMANCE

% of MAXIMUM CONTROL CURRENT

RELIEF PRESSURE

vs. CURRENT (DC) CHARACTERISTIC

Relieving Pressure Port 1 to Port 2

With Constant Flow 7.6 lpm/2 gpm

CURRENT (Amperes)

PRESSURE (BAR/PSI)

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2

10 20 30 40 50 60 70 80 90 100

34.5/500

68.9/1000

103.4/1500

137.9/2000

172.4/2500

206.8/3000

248.2/3500

275.8/4000

Range A

Range B

Range C

U.S. Patent 6,267,350

HYDRAFORCE

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Seals

Buna N (Std.) N

Fluorocarbon V

Polyurethane P

Recommended Electronic Controllers:

Model EFDR2 Multi-Input Fan Drive Controller.

For more information go to:

http://www.hydraforce.com/Electro/fandrive.htm

Recommended Electronic Controllers

catalog page 2.001.1 (Table 2)

Blue rectangles are links to other catalog pages.