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A solenoid-operated, normally closed, poppet-type, screw-in hydraulic cartridge valve, designed to operate as a bidirectional load-holding or blocking valve in high flow circuits requiring low internal leakage.
When the SV20-S38 is de-energized, it functions as a check valve, allowing flow from ➀ to ➁ while blocking flow from ➁ to ➀. When energized, the poppet lifts to open the ➁ to ➀ flow path while also allowing flow from ➀ to ➁. Port ➂ is typically connected to the reservoir.
Operation of Manual Override Feature: To override, push button in and 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 valve function, push
button in, twist clockwise 180° and release. Override will be detented in this position.
• Continuous-duty rated solenoid.
• Manual override option.
• Hardened precision spool and cage. • Optional E-Coils rated up to IP69K.
• Optional coil voltages and terminations.
• Unitized, molded coil design.
• Effi cient wet-armature construction.
• Industry common cavity.
• Cartridges are voltage interchangeable.
Operating Pressure: 293 bar (4250 psi)
Flow: 378 lpm (100 gpm) max.
Internal Leakage: 1 ml/minute (0.06 cu. in./minute) max. at 293 bar (4250 psi)
Temperature: -40 to 100°C with standard Buna seals
Coil Duty Rating: Continuous from 85% to 115% of nominal voltage
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 207 bar (3000 psi)
Temperature: -40 to 120°C with standard Buna 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: No restrictions; See page 9.020.1
Cavity: VC20-S3, Variation "A"; See page 9.120.1
Cavity Tool: CT20-S3xx; See page 8.600.1
Seal Kit: SK20-S3x-MM; See page 8.650.1
Coil Nut: Part No. 7004400; For E-coils manufactured prior to 1-1-04, see page 3.400.1 for coil nut info.