SF08-21 Poppet, 2-Way, N.O., High Pressure
DESCRIPTION
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.
OPERATION
When de-energized, the SF08-21 allows fl ow 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 fl ow from
➁ to ➀.
In this mode the cartridge will allow
➀ to ➁ fl ow after overcoming the solenoid force
(requires 3.4 to 10.3 bar / 50 to 150 psi).
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.
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 fl ow 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.
SYMBOLS
USASI: ISO:
1.031.1
1
2
1
2
6.9/100
13.8/200
17.2/250
10.3/150
20.7/300
3.4/50
7.5
2
15.1
4
22.7
6
30.2
8
FLOW lpm/gpm
PRESSURE DROP bar/psi
37.9
10
➀ to ➁ Energized - - - -
➁ to ➀ De-energized ——
32 cSt/150 sus oil at 40°C
PERFORMANCE (Cartridge Only)
SOLENOID VALVES
HYDRAFORCE
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