Solenoid-Operated On/Off Valve

SV08-31 — Spool-Type, 3-Way
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SV08-31 Valve

SV08-31 Valve symbol
A solenoid-operated, 3-way, spool-type, direct-acting, screw-in hydraulic directional cartridge valve.

When de-energized, the SV08-31 allows flow from 2 to 1 while blocking flow at 3.
When energized, the cartridge’s spool shifts to open flow from 1 to 3, while blocking 2.
While port 1 may be fully pressurized, it is not intended to be used as the inlet.

Operation of Manual Override Option: To override, push button in, twist counterclockwise 180°.
The internal spring will push the button out. In this position, the valve may be only partially shifted.
To assure full override shift, pull the button out to its fullest extension and hold it in this position. To
return to normal operation, push button in, twist clockwise 180°, and release. Override will be detented
in this position.

• Continuous-duty rated coil.
• Hardened precision spool and cage for long life.
• Optional coil voltages and terminations.
• Efficient wet-armature construction.
• Cartridges are voltage interchangeable.
• All ports may be fully pressurized.
• Unitized, molded coil design.
• Manual override option.
• Optional waterproof E‑Coils rated up to IP69K.
• Industry common cavity – Compact size.

Operating Pressure: 207 bar (3000 psi)
Proof Pressure: 240 bar (3500 psi) without manual override
Burst Pressure: 620 bar (9000 psi) without manual override
Flow: Up to 11 lpm (3 gpm); Under certain operating conditions this valve may be
   rated for higher flow; consult factory.
Maximum Internal Leakage: Tested at 207 bar (3000 psi):
   Port 3 (de-energized) 82 ml/minute (5 cu. in./minute) max. at 207 bar (3000 psi);
   Port 1 (energized) 164 ml/min (10
Temperature: -40 to 100 °C (-40 to 212 °F) with Buna seals;
   -26 to 204 °C (-15 to 400 °F) with fluorocarbon seals;
   -54 to 104 °C (-65 to 225 °F) with polyurethane seals
Coil Duty Rating: Continuous from 85% to 115% of nominal voltage
Response Time: First indication of change of state with 100% voltage supplied at 80%
  of nominal flow rating: Energized: 30 ms De-energized: 25 ms
Initial Coil Current Draw at 20 °C: Standard Coil: 1.2 A at 12 Vdc;
   0.13 A at 115 Vac (full wave rectified).
   E‑Coil: 1.4 A at 12 Vdc; 0.7 A at 24 Vdc
Minimum Pull-in Voltage: 10.2 VDC (12-VDC coil)
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: No restrictions; See page 9.020.1
Cavity: VC08-3; See page 9.108.1_3w
Cavity Tool: CT08-3xx; See page 8.600.1
Seal Kit: SK08-3x-MM; See page 8.650.1
Coil Nut: Part No. 7004400



SV08-31 Valve Performance Chart

SV08-31 Valve Dimensions



Cartridge: Weight: 0.13 kg (0.28 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O‑rings and back-ups standard.

Standard Ported Body: Weight: 0.27 kg (0.60 lb); Anodized high-strength 6061 T6 aluminum alloy, rate to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.
See page 8.008.1_3w.

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

E‑Coil: Weight: 0.14 kg (0.3 lb); Perfect wound, fully encapsulated with rugged external metal shell; Rated up to IP69K with integral connectors.
See page 3.400.1_08-size.



SV08-31 Ordering Chart Manual Override Options E-Coils D-Coils