Directional Valves

EV12-S34 — Vented, Spool-Type, Directional Element
   Selection guide - similar valves.
   PDF file of this page.
   STP file for EV12-S34.
   Request a quote.

EV12-S34 Valve

EV12-S34 Valve symbol

A spool-type, screw-in, cartridge-style, hydraulic directional element, with multifunction potential when used with other directional, pressure, or flow control devices. A tall cap option with higher bias spring values is available.

The EV12-S34 is a spring-biased blocking valve which will shift to allow full flow from 1 to 2 only when port 3 is vented to create a pressure drop across the internal orifice which exceeds the pressure of the bias spring force. EV12-S34 is a vent-to-open directional valve.

• Multiple function/application potential.
• Low pressure drop.
• Industry-common cavity.
• Smooth shift transition.
• Optional tall cap version for higher bias spring values.

Operating Pressure: Cartridge only: 345 bar (5000 psi) with polyurethane seals;
   Aluminum housing: 207 bar (3000 psi); Ductile iron housing: 345 bar (5000 psi)
Flow: Up to 151 lpm (40 gpm)
Internal Leakage: 7.6 bar (110 psi)
Bias Spring Pressure: 164 cc/minute (10 cu. in. per minute) max. at 207 bar (3000 psi)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54° to 107°C (-65°F to 225°F) with Polyurethane 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: Orifice discs should not be used with this valve; See page 9.020.1
Cavity: VC12-S3; See page 9.112.1_3w
Cavity Tool: CT12-S3xx; See page 8.600.1
Seal Kit: SK12-S3x-MM; See page 8.650.1


EV12-S34 Valve Performance Chart
EV12-S34 Valve Dimensions


Cartridge: Weight: 0.23 kg. (0.5 lbs.)
Tall Cap Option Weight: 0.45 kg.
(1.0 lb.) Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and polyester elastomer back-ups standard.

Ported Body: Weight: 1.13 kg.
(2.5 lbs.) Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies are available for pressures up to 350 bar (5000 psi); Weight and dimensions may differ. See page 8.012.1_3w

EV12-S34 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for EV12-S34 Request a quote.