Flow Control Valves — HyPerformance™

HEC12-34 — Flow Regulator, Pressure Compensator
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EC12-34 Valve

U.S. Patent 7,261,030

HEC12-34 Valve symbol


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.

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.

• 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%

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; See page 9.112.1_3w
Cavity Tool: HCT12-3xx; See page 8.600.1
Seal Kit: HSK12-3U-0; See page 8.650.1




HEC12-34 Flow vs. Pressure



HEC12-34 Valve Dimensions



Cartridge: Weight: 0.42 kg (0.93 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; PPDI Urethane O-rings with no back-ups standard.

Ported Body:
Weight: 4.05 kg
(8.93 lb); H-series ductile iron standard. Rated to 345 bar (5000 psi). See page 8.012.1_3w.



HEC12-34 Ordering