FLOW CONTROLS
EC12-40 Pressure Compensator
DESCRIPTION
A screw-in, cartridge-style pressure-compensating element, intended for use with
a remote fi xed or variable orifi ce to yield a three-port (bypass-type), pressure-
compensated, fl ow regulating hydraulic valve.
OPERATION
The EC12-40 maintains a constant fl ow rate from ➂ regardless of load pressure
changes in the circuit downstream of
➂.
The cartridge maintains a constant differential pressure from circuit point P to
port
➂ (see USASI Symbol), thereby regulating the hydraulic fl ow rate between the
two points in the circuit. The EC12-40 is a priority type regulator, delivering pump
fl ow fi rst to
➂, then bypassing excess to ➁. All ports may be fully pressurized.
FEATURES
• Hardened parts for long life.
• Quiet, modulated response.
• Cost effective cavity.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow Rate: 80 lpm (21 gpm) max. regulated; 120 lpm (32 gpm) max. input;
68 lpm (18 gpm) bypass.
Standard Compensator Bias Spring: 6.9 bar (100 psi)
Flow Maintenance: 7.57 to 75.7 lpm (2 to 20 gpm) settings ±10%
Temperature: -40 to 120°C
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: CT12-4XX; See page 8.600.1
Seal Kit: SK12-4X-MMM; See page 8.650.1
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
5.450.1
10.1/0.40
8.9/0.35
7.6/0.30
6.4/0.25
5.1/0.20
ORIFICE DIAMETER mm/inch
Output Flow vs. Orifice Dia.
with 100 psid Spring
32 cSt/150 ssu oil at 40°C
18.9
5
37.9
10
56.8
15
FLOW lpm/gpm
75.8
20
3.8/0.15
94.6
25
2.5/0.10
1.3/0.05
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Cartridge: Weight: 0.28 kg. (0.61 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
EC12-40
5.450.2
Seals
N Buna N (Std.)
V Fluorocarbon
EC12-40 - __ __ __ - __ - __
Compensator Spring
100 6.9 bar (100 psid) standard
160 11.0 bar (160 psid)
®
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®
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