Valves - Directional Controls - Logic Element - Vent to open

EV12-S34

DIRECTIONAL ELEMENT, VENTED

Overview

Description

The ev12-s34xx is a screw-in, cartridge style, spool-type, hydraulic directional element

Operation

It is a spring biased blocking valve which will shift to allow full flow from port 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 value

Features

  • Multiple function/application potential.
  • Low pressure drop.
  • Industry-common cavity.
  • Smooth shift transition.
  • Optional tall cap version for higher bias spring values.
Pressure Ratings
Pressure rating:
  • 345 bar (5000 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum internal leakage:
  • 164 ml/min (10 in³/min) At 207 bar (3000 psi)
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 90 °C (-40 to 194 °F)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.41 kg (0.9 lb) EV12-S34T
  • 0.28 kg (0.61 lb) EV12-S34
Internal wetted surface area:
  • 253 cm² (39.23 in²) EV12-S34T
  • 206 cm² (31.91 in²) EV12-S34
EV12-S34_Perf_Chrt
EV12-S34_Dim_Dwg

Materials

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.

Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-S3X-MM X = seal option
EV12-S34_Order
POSITION
CODE
DESCRIPTION
EV12-S34CD-H-J-R
C
Adaptor Option
C
BLANK
Standard Cap
C
T
Tall Cap
D
Cage Option
D
BLANK
Standard Cage
D
G
Meteering (staggered holes)
H
Line Body
H
0
No Body
H
12T
Aluminum SAE 12
H
12TD
Ductile Iron SAE 12
H
6BD
Ductile Iron BSPP 3/4" (6)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
10
10 psi Bias Spring
R
40
40 psi Bias Spring
R
80
80 psi Bias Spring
R
100
100 psi Bias Spring
R
160
160 psi Bias Spring
R
240
240 psi Bias Spring