Valves - Flow Controls - Pressure Compensator - Priority Type - Pre-Compensator - Dynamic Load Sense

EC12-43

PRIORITY ON DEMAND PRESSURE COMPENSATOR WITH DYNAMIC LOAD SENSE

Overview

Description

EC12-43 is a screw-in, cartridge style, priority on demand pressure compensator valve with dynamic load sense. It is intended to provide priority flow in required amount, while allowing excessive flow to be used for auxiliary functions

Operation

With inlet flow at port 3, the EC12-43 will deliver required priority flow at port 4 regardless of load pressure. Excessive flow exits at port 2 and port 1 is the load sense port. All ports may be fully pressurized

Features

  • Priority-on-demand.
  • Dynamic load sense.
  • Hardened parts for long life.
  • Quiet, modulated response.
  • Industry-common cavity.

Ratings

Pressure Ratings
Pressure rating
345 bar (5000 psi)
Flow Ratings
Inlet flow rating
68 lpm (18.0 gpm) Maximum, with compensating spring 5.5 bar (80 psi)
83 lpm (22.0 gpm) Maximum, with compensating spring 7.6 bar (110 psi)
95 lpm (25.0 gpm) Maximum, with compensating spring 11.0 bar (160 psi)
132 lpm (35.0 gpm) Maximum, with compensating spring 15.2 bar (220 psi)
Priority flow rating
Up to 80% of input flow
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
-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 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection
960 hr salt spray per ASTM b117 (model number - gec12-43)

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
0.44 kg (0.96 lb)
Internal wetted surface area
325 cm² (50.3 in²)

Performance

EC12-43_Flow-Pressure

Dimensions

EC12-42_Dim

Materials

Materials

Cartridge: Weight: 0.46 kg (1.02 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-ups standard. For operating pressures above 241 bar (3500 psi), use polyurethane seals.

Standard Ported Body: Weight: 1.5 kg (3.3 lb); Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi); For operating pressures above 241 bar (3500 psi), use ductile iron body; dimensions may differ.

Installation Specifications

Cavity
VC12-4
Cartridge installation torque
99 to 104 N-m (73 to 77 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK12-4X-MMM X = seal option

Order code

POSITION
CODE
DESCRIPTION
EC12-43-H-J-R
H
Line Body
H
0
No Body
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
80
80 Compensator Spring
R
110
110 Compensator Spring
R
160
160 Compensator Spring
R
220
220 Compensator Spring
EC12-43_Order