DIRECTIONAL VALVES

EV12-S34 Vented Spool-Type Logic Element

DESCRIPTION

A spool-type, screw-in, cartridge-style, hydraulic directional element, with multi-

function potential when used with other directional, pressure, or fl ow control devices.

OPERATION

The EV12-S34 is a spring-biased blocking valve which will shift to allow full fl ow from

➀ to ➁ only when ➂ is vented to create a pressure drop across the internal orifi ce

which exceeds the pressure value of the selected bias spring force.

RATINGS

Operating Pressure: 345 bar (5000 psi) cartridge; 240 bar (3500 psi) standard

aluminum housing

Flow: See Performance Chart

Internal Leakage: 164 cc/minute (10 cu. in./minute) max. at 207 bar (3000 psi)

Bias Spring Pressure: 7.6 bar (110 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

SYMBOLS

4.521.1

PERFORMANCE (Cartridge Only)

5.5/80

4.1/60

37.8

10

75.7

20

FLOW lpm/gpm

PRESSURE DROP bar/psi

Cartridge: Weight: 0.23 kg. (0.5 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Standard Ported Body: Weight:

1.13 kg. (2.5 lbs.) Anodized high-

TO ORDER

EV12-S34

4.521.2

160 11 bar (160 psi)

240 16.5 bar (240 psi)

Option

(Blank)