U.S. Patent 7,261,030
SYMBOL:
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DESCRIPTION
A screw-in, cartridge-style, flow-on-demand, load sense, 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.
• All HyPerformance™ products are tested to NFPA specification T2.6.1
and are tested at a verification level of 90% and an assurance of 99%
RATINGS
Operating Pressure: 350 bar (5075 psi); 10% cycle life at 420 bar (6090 psi)
Note: HyPerformance valves are tested for 900K cycles at 350 bar and 100K cycles at 420 bar.
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) max. with 13.8 bar (200 psi) compensating spring
Flow Maintenance: See performance chart
Internal Leakage: 5 drops per minute at port 1 with 350 bar (5075 psi) pressure
at port 2, and with 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
Cavity Tool: HCT12-3xx; See page 8.600.1
Seal Kit: HSK12-3U-0; See page 8.650.1 |
