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.

Ratings

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
Maximum 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)

Operating Parameters

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

Properties

Cartridge weight
0.42 kg (0.92 lb)
Internal wetted surface area
280 cm² (43.47 in²)

Performance

EC12-34_Flow-Pressure

Dimensions

EC12-34_Dim

Materials

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.

Installation Specifications

Cavity
VC12-3
Cartridge installation torque
45 to 50 N-m (33 to 37 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK12-3X-MM X = seal option

Order code

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
EC12-34_Order