ELECTRO-PROPORTIONAL VALVES—PRESSURE CONTROLS

TS08-20 Proportional Electrohydraulic Relief Valve

USASI/ISO:

SYMBOLS

2.812.1

PERFORMANCE

FLOW lpm/gpm

0.75

0.2

1.51

0.4

2.27

0.6

3.02

0.8

3.79

1.0

PRESSURE bar/psi

3.4/50

2.8/40

2.1/30

1.4/20

0.7/10

Pressure Drop vs. Flow Characteristic

For Flow 1 to 2 with Coil De-energized

Body & Line Only

Vertical Mount

Horizontal Mount

Range A

Range B

Relief Pressure vs.

Current (DC) 260 Hz Dither

Relieving Pressure 1 to 2

for Various Relief Pressure Ranges

PRESSURE (psi)

200

100

300

400

500

600

PRESSURE (bar)

% of Maximum Control Current

02010 30 50 70 9040 60 80 100

Typical Relief Pressure vs. Flow Characteristic

Typical Relieving Pressure 1 to 2

at Various %’s of Maximum Control Current

Pressure Range “A” (20.7 bar/300 psi)

Pressure Range “B” (34.5 bar/5000 psi); Cartridge in Body

FLOW (gpm)

0 0.5 1.0 1.5 2.0 2.5 3.0

% of MAXIMUM RELIEF PRESSURE

100

125

% of MAXIMUM RELIEF PRESSURE

100

125

FLOW (lpm)

0123 654 7 8 9 10 11 12

50% Max. Control Current

75% Max. Control Current

100% Max. Control Current

25% Max. Control Current

DESCRIPTION

A screw-in, cartridge-style, direct acting, poppet-type electro hydraulic relief valve,

which can be infinitely adjusted across a prescribed range using a variable electric in-

put. Pressure output is proportional to DC current input. This valve is intended for use

as a pressure limiting device in demanding applications.

OPERATION

The TS08-20 blocks flow from 1 to 2 until sufficient pressure is present at 1 to offset

the electrically induced solenoid force. With no current applied to the solenoid, the

valve will free flow from 1 to 2. Note: Back pressure on port 2 becomes additive to the

pressure setting at a 1:1 ratio.

FEATURES

• 12 and 24 volt coils standard.

• Optional waterproof E-Coils rated up to IP69K.

• Industry common cavity.

• Waterproofed coils standard.

RATINGS

Maximum Inlet Pressure: 34.5 bar (500 psi)

Electrical Parameters:

Coil Typical Max. Current

(A) at 0 gpm

Typical Resistance

± 5% @ 20°C (ohms)

Typical Apparent

Inductance (mH)

12 VDC 24 VDC 12 VDC 24 VDC 12 VDC 24 VDC

D-Coil 0.65 0.32 9.8 ±5% 39.3 ±5% 88.9 N/A

E-Coi

0.75 0.37 8.8 ±5% 33.8 ±5% 12.4 62.1

Control Signal: DC or PWM (Significant improvements in valve performance occur

with superimposed dither, with either control method.)

Hysteresis with Dither 250 Hz: 3.0% (7% maximum without dither)

Rated Flow: A: 3.8 lpm/1 gpm @ 1.4 bar/20 psi pressure drop

B: 3.8 lpm/1 gpm @ 0.8 bar/12 psi pressure drop

Step Response: T

<27 ms; TOFF <50 ms

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

Temperature: -40 to 100°C (-40 to 212°F) with standard Buna N seals; -26 to 204°C

(-15 to 400°F) with Viton 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

Coil Nut: Part No. 7004410; For E-coils manufactured prior to 1-1-04, see page 3.400.1.

HYDRAFORCE

.com

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.

TO ORDER

TS08-20

2.812.2

TS08-20__ - __ - __ - __ __ __ __

Maximum

Relief Pressure

34.5 bar (500 psi) A

20.7 bar (300 psi) B

Porting

Cartridge Only 0

SAE 6 6T

3/8 in. BSP* 3B

1/2 in. BSP* 4B

*BSP Body; U.K. Mfr. Only

1.40

35.6

1.41

TORQUE: 5 ft-lb

(6.8 Nm) max.

DIA.

35.8

0.75

ACROSS FLATS

19.1

2.26

57.5

E-Coil

View

Standard

Coil View

1.59

40.3

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

Standard Coil: Weight: 0.11 kg.

(0.25 lbs.) Unitized, thermoplastic

encapsulated, Class H high

temperature magnetwire.

See page 3.200.1

E-Coil: Weight: 0.16 kg. (0.35 lbs.)

Perfect wound, fully encapsulated

with rugged external metal shell.

Rated up to IP69K with integral con-

nectors. Note: See page 3.400.1 for

all E-Coil retrofit applications.

DIMENSIONS

Voltage

0 Less Coil

10 10 VDC (0.80 amps max.)

12 12 VDC (0.65 amps max.)

20 20 VDC (0.40 amps max.)

24 24 VDC (0.33 amps max.)

Seals

Buna N (Std.) N

Fluorocarbon V

Coils with internal diode are

available. Consult factory.

Termination Std. Coil

DS Dual Spades (SAE J858a)

DG DIN 43650

DL Leadwires (2)

DL/W Leads w/Weatherpak

Connectors

DR Deutsch DT04-2P

DJ Amp Junior Timer

DK Kostal (UK only)

DP DL with 0.5" conduit

Termination E-Coil

ER Deutsch DT04-2P (IP69K Rated)

EY Metri-Pack

® 150 (IP69K Rated)

HYDRAFORCE

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Blue rectangles are links to other catalog pages.