Electro-Proportional Valves — Pressure Control

TS12-26 — Proportional Pressure Control, Pilot-Operated Relief
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TS12-26 Valve
U.S. Patent 7,137,406

TS10-26 Valve symbol
A screw-in, cartridge-style, pilot-operated, spool-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.

The TS12-26 blocks flow from 1 to 2 until sufficient pressure is present at 1 to open the
pilot section by offsetting the electrically induced solenoid force. With no current applied
to the solenoid, the valve will relieve at approximately 6.9 bar (100 psi).
The optional manual override allows the valve to be set when the electric supply is lost.
The manual setting is added to the electric setting. To prevent the system from being over
pressurized, the manual override should always be disengaged prior to applying power to the coil.

• 12 and 24 volt coils standard.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Optional manual override.

Max. Operating Pressure: 241 bar (3500 psi)
Max. Control Current: 1.10 amps for 12 VDC coil; 0.55 amps for 24 VDC coil
Operational Relief Pressure Range: from zero to max. control current:
   Range A: 6.9 to 207 bar (100 to 3000 psi); Range B: 6.9 to 138 bar (100 to 2000 psi) ;
   Range C: 2.1 to 69 bar (30 to 1000 psi)
Rated Flow: 189 lpm (50 gpm) @ Pressure Drop (Cartridge only) A: 2.3 bar (178 psi);
   B: 9.7 bar (141 psi; C: 8.5 bar (124 psi) Port 1 to 2 (coil de-energized)
Max. Pilot Flow: Range A: 1.9 lpm (0.5 gpm); Range B: 1.3 lpm (0.35 gpm);
   Range C: 0.9 lpm (0.25 gpm)
Electrical Parameters:
D 12 7.25 ± 5% 141 1.10
24 28.35 ± 5% 626 0.55
E 12 7.3 ± 5% 139 1.32
24 29.4 ± 5% 600 0.66
Hysteresis: less than 3%
Response Time: 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: VC12-2; See page 9.112.1_2w
Cavity Tool: CT12-2xx; See page 8.600.1
Seal Kit: SK12-2x-B; See page 8.650.1
Coil Nut: Part No. 4540560

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




TS12-26 Valve Performance Chart


TS12-26 Valve Performance



TS12-26 Valve Dimensions



Cartridge: Weight: 0.56 kg (1.23 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups standard.

Standard Ported Body: Weight: 0.36 kg
(0.80 lb); Anodized high-strength 6061 T6
aluminum alloy, rated to 207 bar (3000 psi);
Ductile iron bodies available; dimensions
may differ. See page 8.012.1_2w.

Standard D-Coil: Weight each: 0.32 kg
(0.7 lb); Unitized thermoplastic encapsulated,
Class H high temperature magnetwire.
See page 3.200.1_10-size.

E-Coil: Weight: 0.41 kg (0.9 lb); Perfect
wound, fully encapsulated with rugged
external metal shell; Rated up to IP69K with
integral connectors.
See page 3.400.1_10-size.



TS12-26 Ordering Chart