SF08-21 Poppet, 2-Way, N.O., High Pressure (SF08-21)
A solenoid-operated, 2-way, piloted, poppet-type, normally open, screw-in, hydraulic cartridge valve designed for low leakage in higher pressure load-holding applications.
Product Operation
When de-energized, the SF08-21 allows flow from ➁ to ➀. Flow from ➀ to ➁ is severely restricted in this mode. If the ➁ to ➀ path is required see model SF08-23, page 1.051.1.
When energized, the valve’s poppet closes on its seat, blocking flow from ➁ to ➀. In this mode the cartridge will allow ➀ to ➁ flow after overcoming the solenoid force (requires 3.4 to 10.3 bar / 50 to 150 psi).
Product Features
• Continuous-duty rated coil.
• Hardened seat for long life and low leakage.
• Optional coil voltages and terminations.
• Effi cient wet-armature construction.
• Cartridges are voltage interchangeable.
• Unitized, molded coil design.
• Optional waterproof E-Coils rated up to IP69K.
• Industry common cavity.
• Compact size.
Product Ratings
Operating Pressure: 345 bar (5000 psi)
Flow: See Performance Chart
Internal Leakage: 0.15 cc/minute (3 drops/minute) max. at 345 bar (5000 psi)
Temperature: -40 to 120°C with standard 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: 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 rectifi ed). E-Coil: 1.4 amps at 12 VDC; 0.7 amps at 24 VDC
Minimum Pull-in Voltage: 85% of nominal at 345 bar (5000 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
Cavity Tool: CT08-2XX; See page 8.600.1
Seal Kit: SK08-2X-T; See page 8.650.1
Coil Nut: Part No. 7004410; For E-coils manufactured prior to 1-1-04, see page 3.400.1 for coil nut info.
