FLOW CONTROLS
HEC12-34 Pressure Compensator, Load Holding
PERFORMANCE (Cartridge Only)
ISO SYMBOL
5.435.1
DESCRIPTION
A screw-in, cartridge-style, load sense, flow-on-demand pressure-compensator with
built-in damping and load-holding features for use in gravity-lowering circuits.
OPERATION
The HEC12-34 is designed to be used in combination with a flow control valve for
lowering and holding a load. 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.
RATINGS
Operating Pressure: 350 bar (5075 psi) 10% cycle life 420 bar (6090 psi)
Proof Pressure: 690 bar (10,000 psi)
Burst Pressure: 1380 bar (20,000 psi)
Minimum Inlet Pressure Required in Load-Holding Mode: 31.0 bar (450 psi)
Flow Rating: 83 lpm (22 gpm) with 200 psi compensating spring
Flow Maintenance: See performance chart
Maximum Internal Leakage: 5 drops per minute at port 1 with 350 bar (5075 psi)
pressure at port 2 and port 3 blocked.
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: HVC12-3; See page 9.112.1
Cavity Tool: HCT12-3X0-X-X; See page 8.600.1
Seal Kit: HSK12-3U-0; See page 8.650.1
U.S. Patent
7,261,030
HYDRAFORCE
.com
®
PRESSURE DROP bar/psi
276/4000
207/300069/1000
0
345/5000
138/2000
94.6/25
56.8/15
18.9/5
75.7/20
37.9/10
FLOW (lpm/gpm
Flow Characteristics (Meter Out Mode)
HEC12-34 with 13 Bar (200 psi) Spring
32cSt Oil at 40°C (104°F)
Blue rectangles are links to other catalog pages.
DIMENSIONS
HEC12-34
5.435.2
1.76
44.6
TORQUE:
115-125 ft-lbs
156-170 Nm
2.88
73.1
ORIFICE DISC CANNOT BE
USED WITH THIS VALVE
due to HyPerformance
™
cavity.
2.50
63.5
2.12
53.8
0.18
4.78
Cartridge: Weight: 0.42 kg. (0.93 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
PPDI urethane seals without
back-up rings standard.
Standard Ported Body: Weight:
4.05 kg. (8.93 lbs.) HyPerformance™
Ductile iron (code 'D') standard.
Rated to 354 bar (5000 psi).
MATERIALS TO ORDER
HEC12-34 - __ __ __ - __ - 200
Seals
U PPDI Urethane
Compensator Spring
200 13.8 bar (200 psid)
Porting
Cartridge Only 0
SAE 12 12TD
3/4 in. BSP 6BD
U.S. Patent No. 7,261,030
®
HYDRAFORCE
HYDRAFORCE
.com
®
* BSP Body; U.K. Mfg.Only
NOTE: Urethane seals recommended for operating
pressures above 241 bar (3500 psi).
NOTE: Consult factory for additional seal options.
