Electro-Proportional Valves — Pressure Control

TS08-20 — Proportional Pressure Control, Relief
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TS08-20 Valve

SYMBOL:
TS08-20 Valve symbol
DESCRIPTION
A screw-in, cartridge-style, direct acting, poppet-type hydraulic relief valve, which can
be infinitely adjusted across a prescribed range using a variable electric input. 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.
• Waterproof coils standard.

RATINGS
Max. Inlet Pressure: 34.5 bar (500 psi)
Electrical Parameters:
COIL

Typical Max. Current
(amp) at 0 gpm

Typical Resistance ±5%
at 20°C (ohms)

Typical Apparent Inductance (mH)

12 VDC 24 VDC 12 VDC 24 VDC 12 VDC 24 VDC
D-Coil 0.65 amp 0.32 amp 9.8 ohms ±3% 39.3 ohms ±5% 88.9 mH N/A
E-Coil 0.75 amp 0.37 amp 8.8 ohms ±3% 33.8 ohms ±5% 12.4 mH 62.1 mH
Control Signal: DC or PWM (Significant improvements in valve performance occur with superimposed
dither, with either control method.)
Dither Frequency: 250 Hz or higher
Hysteresis: with Dither of 250 Hz: 3.0%; without Dither: 7% maximum
Operational Relief Pressure Range: from zero to max. control current:
   Range A: 0 to 34.5 bar (0 to 500 psi); Range B: 0 to 20.7 bar (0 to 300 psi)
Rated Flow: Range A: 3.8 lpm (1 gpm) at 1.4 bar (20 psi) pressure drop;
   Range B: 3.8 lpm (1 gpm) at 0.8 bar (12 psi) pressure drop
Step Reponse: TON <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 Buna seals;
   -26° to 204°C (-15° to 400°F) with fluorocarbon 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: 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; See page 9.020.1
Cavity: VC08-2; See page 9.108.1_2w
Cavity Tool: CT08-2xx; See page 8.600.1
Seal Kit: SK08-2x-B; See page 8.650.1
Coil Nut: Part No. 7004410

RECOMMENDED ELECTRONIC CONTROLLERS
See model EFDR2 Multi-Input Fan Drive Controller, or EVDR-Type Controller Selection Guide,
or for other Electronic Controllers, see page 2.001.1_pdf



 

 

PERFORMANCE:

TS08-20 Valve Performance Chart

 

DIMENSIONS:

TS08-20 Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.15 kg (0.33 lb);
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 lb); 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_2w.

Standard D-Coil: Weight each: 0.11 kg
(0.25 lb); Unitized thermoplastic
encapsulated, Class H high temperature
magnetwire. See page 3.200.1_08-size.

E-Coil: Weight: 0.16 kg (0.35 lb); Perfect
wound, fully encapsulated with rugged
external metal shell; Rated up to IP69K with
integral connectors.
See page 3.400.1_08-size.

 

ORDERING CHART:

TS08-20 Ordering Chart