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DESCRIPTION
A solenoid-operated, 2-way, normally open, piloted poppet-type, screw-in hydraulic cartridge valve designed for low leakage in higher pressure load-holding applications.
OPERATION
When de-energized, the SF08-21 allows flow from 2 to 1, while flow from 1 to 2 is severely restricted. When energized, the valve closes, blocking flow from 2 to 1. In this mode, flow from 1 to 2 will be allowed after overcoming the solenoid force. This requires 3.4 to 10.3 bar (50 to 150 psi).
For bi-directional capability, see model SF08-23, page 1.051.1.
Operation of Manual Override Option: To override, push and hold override button.
FEATURES
• Continuous-duty rated coil.
• Hardened seat for long life and low leakage.
• Optional coil voltages and terminations.
• Cartridges are voltage interchangeable.
• Unitized, molded coil design.
• Manual override option.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common, compact size.
RATINGS
Operating Pressure: 345 bar (5000 psi)
Flow: Up to 30 lpm (8 gpm)
Internal Leakage: 0.15 cc/minute (3 drops/minute) max. at 345 bar (5000 psi)
Temperature: -40° to 100°C (-40° to 212°F) with standard Buna 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: 39 msec. De-energized: 35 msec.
Initial Coil Current Draw at 20°C: Standard Coil: 1.2 amps at 12 VDC;
0.13 amps at 115 VAC (full wave rectified).
E-Coil: 1.4 amps at 12 VDC; 0.7 amps at 24 VDC
Minimum Pull-in Voltage: 85% of nominal at 207 bar (3000 psi)
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: VC08-2; See page 9.108.1_2w
Cavity Tool: CT08-2xx; See page 8.600.1
Seal Kit: SK08-2x-T; See page 8.650.1
Coil Nut: Part No. 7004410 |
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MATERIALS:
Cartridge: Weight: 0.09 kg. (0.20 lbs.);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Polyurethane cast O-rings and Fluorocarbon back-up standard.
Standard Ported Body: Weight: 0.54 kg.
(1.2 lbs.); Ductile iron standard, rated to
345 bar (5000 psi). See page 8.008.1_2w.
Standard D-Coil: Weight each: 0.11 kg.
(0.25 lbs.); Unitized thermoplastic encapsulated, Class H high temperature magnetwire. See page 3.200.1_08-size.
E-Coil: Weight: 0.14 kg. (0.3 lbs.); Perfect wound, fully encapsulated with rugged
external metal shell; Rated up to IP69K
with integral connectors.
See page 3.400.1_08-size. |
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