Valves - Flow Controls - Pressure Compensator - Restrictive Type - Pre-Compensator - Load Holding

EC12-34

PRESSURE COMPENSATING ELEMENT WITH LOAD SENSE U.S. PATENT 7,261,030

Overview

Description

EC12-34 is a screw-in, cartridge style, load sense, pressure compensator with built-in damping and load holding features

Operation

With inlet flow at port 2, port 3 will deliver required flow regardless of load pressure sensed at port 1

Features

  • Hardened parts for long life.
  • Hardened seat for low-leakage load-holding capability.
  • Quiet, modulated response.
  • Industry-common cavity.
Pressure Ratings
Pressure rating:
  • 241 bar (3500 psi)
Proof pressure:
  • 345 bar (5000 psi)
Burst pressure:
  • 896 bar (13000 psi)
Minimum inlet pressure required in load holding mode:
  • 17.2 bar (250 psi) With compensation value 8.3 bar (120 psi)
  • 31.0 bar (450 psi) With compensation value 13.8 bar (200 psi)
Flow Ratings
Flow rating:
  • 57 lpm (15.0 gpm) With compensation value 8.3 bar (120 psi)
  • 83 lpm (22.0 gpm) With compensation value 13.8 bar (200 psi)
Maximum internal leakage:
  • 5 drops/min At port 1 with at port 2 and port 3 blocked 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
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406
Unit weight:
  • 0.42 kg (0.92 lb)
Internal wetted surface area:
  • 280 cm² (43.47 in²)
EC12-34_Flow-Pressure
EC12-34_Dim

Materials

Cartridge: Weight: 0.42 kg (0.92 lb); 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 lb); Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.

Cavity:
Cartridge installation torque:
  • 45 to 50 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-3X-MM X = seal option
EC12-34_Order
POSITION
CODE
DESCRIPTION
EC12-34-H-J-R
H
Line Body
H
0
No Body
H
8T
Aluminum SAE 8
H
10T
Aluminum SAE 10
H
12T
Aluminum SAE 12
H
12TD
Ductile Iron SAE 12
H
6B
Aluminum BSPP 3/4" (6)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Compensator Spring
R
120
120 Compensator Spring
R
200
200 Compensator Spring