FLOW CONTROLS
HEC12-42 Pressure Compensator, Static Load Sense
DESCRIPTION
A screw-in, cartridge-style, priority-on-demand, pressure compensator with static load
sense intended to provide priority flow in the required amount, while allowing
excess flow to be used for auxiliary functions.
OPERATION
With inlet flow at port 3, the HEC12-42 will deliver required priority flow at port 4,
based on the size of the external orifice, regardless of load pressure. Excess flow
exits, or is bypassed, at port 2. Port 1 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: 350 bar (5075 psi) 10% lift cycle; 420 bar (6090 psi)
Proof Pressure: 690 bar (10000 psi)
Burst Pressure: 1380 bar (20000 psi)
Maximum Inlet Flow Rate:
95 lpm (25 gpm) with 11 bar (160 psi) compensating spring;
68 lpm (18 gpm) with 5.5 bar (80 psi) compensating spring
Priority Flow Rate: Up to 80% of maximum input flow
Flow Maintenance: See performance chart.
Temperature: -54° to 107°C (-65° to 225°F) with PPDI Urethane 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: HVC12-4
Cavity Tool: HCT12-4-xxx; See page 8.600.1
Seal Kit: HSK12-4U-MMM; See page 8.650.1
PERFORMANCE (Cartridge Only)
5.471.1
ISO SYMBOL
HYDRAFORCE
.com
®
Priority Flow vs. Load
HEC12-42-80 at 68 lpm/18 gpm Inlet Flow
32 cST/150 sus oil at 40çC
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
Pressure Drop vs. Inlet Flow
Port 3 to Port 2, Port 4 Blocked
32 cST Oil at 40çC (104çF)
80 psi Spring
160 psi Spring
INLET FLOW lpm/gpm
0
19
5
38
10
57
15
76
20
95
25
114
30
PRESSURE bar/psi
13.79/200
11.0/160
8.27/120
5.52/80
2.76/40
Priority Flow vs. Load
HEC12-42-160 at 95 lpm/25 gpm Inlet Flow
32 cST/150 sus oil at 40çC
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
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.
Urethane seals without back-up
rings standard.
Standard Ported Body: Weight:
5.04 kg. (11.13 lbs.) Ductile iron
(code 'D') body standard. Rated
to 345 bar (5000 psi).
.
DIMENSIONS
MATERIALS TO ORDER
Porting
Cartridge Only 0
SAE 12 12TD
*3/4 in. BSP 6BD
HEC12-42
5.471.2
Seals
U PPDI Urethane
HEC12-42 - __ __ __ - __ - __
Compensator Spring
80 5.5 bar (80 psi)
150 10.3 bar (150 psi)
®
HYDRAFORCE
HYDRAFORCE
.com
®
TORQUE
115-125 ft-lbs
(156-170 Nm)
1.25
31.8
3.86
98.1
0.18
4.78
3.62
92.0
0.34
8.7
NOTE: Orifice discs
cannot be used with this
valve due to the
HyPerformance cavity.
*BSP Body; U.K. Mfr. Only
