Valves - Directional Controls - Logic Element - Pilot to Close

EP12-S35

DIRECTIONAL ELEMENT, PILOTED

Overview

Description

The ep12-s35xx is a screw-in, cartridge style, pilot to close hydraulic directional element

Operation

The valve is a spring-biased blocking valve which will shift to allow full flow from port 1 to 2 only when the pressure at port 1 exceeds the cumulative pressure of port 3, plus the bias spring pressure value

Features

  • Multiple function/application potential.
  • Low pressure drop.
  • Industry-common cavity.
  • Manual override option available with 80 psi spring.
Pressure Ratings
Pressure rating:
  • 345 bar (5000 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum internal leakage:
  • 131 ml/min (8 in³/min) At 345 bar (5000 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
  • -26 to 204 °C (-15 to 400 °F) With high durometer 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:
  • 0.28 kg (0.61 lb) EP12-S35
  • 0.44 kg (0.97 lb) EP12-S35T
  • 0.31 kg (0.69 lb) EP12-S35M
Internal wetted surface area:
  • 207 cm² (32.15 in²) EP12-S35
  • 269 cm² (41.63 in²) EP12-S35T
  • 190 cm² (29.52 in²) EP12-S35M
EP12-S35_Perf_Chrt
EP12-S35_Dim_Dwg

Materials

Cartridge: 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 lb) 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 torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-S3X-MM X = seal option
EP12-S35_Order
POSITION
CODE
DESCRIPTION
EP12-S35CDF-H-J-R
C
Adaptor Option
C
BLANK
Standard Cap
C
T
Tall Cap
D
Cage Option
D
BLANK
Standard Cage
D
G
Metering (staggered holes)
F
Stroke Limiter
F
BLANK
Standard
F
M
Stroke Limiter
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