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A spool-type, screw-in, cartridge-style, hydraulic directional element, with multi-function potential when used with other directional, pressure, or flow control devices.
The EV20-S34 is a spring-biased blocking valve which will shift to allow full flow from ➀ to ➁ only when ➂ is vented to create a pressure drop across the internal orifice which exceeds the pressure value of the selected bias spring force.
EV20-S34 is a vent-to-open directional valve.
• Multiple function/application potential.
• Smooth shift transition.
• Low pressure drop.
• Industry common cavity.
Maximum Operating Pressure: Cartridge Only: Ports ➀ & ➁: 345 bar (5000 psi). Port ➂: 320 bar (4600 psi); Polyurethane seals are recommended for 5000 psi operation. Aluminum bodies for this product are rated for 207 bar (3000 psi).
Flow: See Performance Chart
Internal Leakage: 1 cc/minute (1 cu. in./minute) max. at 320 bar (4600 psi)
Bias Spring Pressure Options: 3.5 bar (50 psi); 5.5 bar (80 psi); 11.0 bar (160 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; See page 9.120.1
Cavity Tool: CT20-S3xx; See page 8.600.1
Seal Kit: SK20-S3x-MM; See page 8.650.1
