FLOW CONTROLS
EC12-43 Pressure Compensator
DESCRIPTION
A screw-in, cartridge-style, priority-on-demand, pressure compensator with dynamic
load sense intended to provide priority fl ow in the required amount, while allowing
excess fl ow to be used for auxiliary functions.
OPERATION
With inlet fl ow at port ➂, the EC12-43 will deliver required priority fl ow at port ➃,
based on the size of the external orifi ce, regardless of load pressure. Excess fl ow
exits, or is bypassed, at port
➁. Port ➀ is the load sense port. All ports may be
fully pressurized.
FEATURES
• Hardened parts for long life.
• Quiet, modulated response.
• Industry common cavity.
RATINGS
Operating Pressure: Inlet: 345 bar (5000 psi);
Note: Steel body required when used at or near 5000 psi.
Maximum Input Flow Rate: 95 lpm (25 gpm) with 160 psi compensating spring;
68 lpm (18 gpm) with 80 psi compensating spring
Priority Flow Rate: Up to 80% of input fl ow
Flow Maintenance: See performance chart
Temperature: -40 to 120°C with Buna N seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-4; See page 9.112.1
Cavity Tool: CT12-4-XXX; See page 8.600.1
Seal Kit: SK12-4X-MMM; See page 8.650.1
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
5.490.1
Priority Flow vs. Load
EC12-43-160 at 95 lpm/25 gpm Inlet Flow
32 cST/150 sus oil at 40°C
95/25
76/20
57/15
19/5
0
38/10
FLOW lpm/gpm
Bypass > Priority LOAD PRESSURE Priority > Bypass
276
4000
276
4000
207
3000
207
3000
138
2000
138
2000
69
1000
69
1000
345
5000
345
5000
0 bar
0 psi
HYDRAFORCE
.com
®
Note: This valve, the EC12-43, replaces the older EC12-41 functionally,
although the two valves have different port logic. We will continue
to provide the EC12-41 for existing customers, but recommend
conversion to the new EC12-43 for new designs.
For more information consult factory.
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.46 kg. (1.02 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
1.50 kg. (3.30 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1
DIMENSIONS
MATERIALS TO ORDER
Porting
Cartridge Only 0
SAE 10 10T
SAE 12 12T
EC12-43
5.490.2
Seals
N Buna N (Std.)
V Fluorocarbon
EC12-43 - __ __ __ - __ - __
Compensator Spring
80 5.5 bar (80 psi)
160 11.0 bar (160 psi)
TORQUE
73 – 77 ft-lbs
(99 – 104 Nm)
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
