Flow Control Valves

EC12-34 — Flow Regulator, Pressure Compensator, Load-Holding
  Product Improvement Bulletin.
  Selection guide - similar valves.
  PDF file of this page.
  STP file for EC12-34.
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EC12-34 Valve
U.S. Patent 7,261,030

EC12-34 Valve symbol


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.

The EC12-34 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 at 2. Port 1 of the compensator must be connected to the
outlet of a flow control valve that is connnected to the tank.

• Hardened parts for long life.
• Hardened seat for low-leakage load-holding capability.
• Quiet, modulated response.
• Industry-common cavity.

Operating Pressure: Inlet: 241 bar (3500 psi) maximum
Proof Pressure: 345 bar (5000 psi)
Burst Pressure: 896 bar (13,000 psi)
Flow Rating: 57 lpm (15.gpm) with 8.3 bar (120 psi) compensation spring;
   83 lpm (22 gpm) with 13.8 bar (200 psi) compensating spring
Flow Maintenance: See performance chart
Maximum Internal Leakage: 5 drops per minute at Port 1 with 207 bar (3000 psi) at
   Port 2 and Port 3 blocked.
Minimum Inlet Pressure Required in Load-Holding Mode: 17.2 bar (250 psi)
   with 8.3 bar (120 psi) compensation spring; 31 bar (450 psi) with 13.8 bar (200 psi)
   compensation spring
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon 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: VC12-3; See page 9.112.1_3w
Cavity Tool: CT12-3xx; See page 8.600.1
Seal Kit: SK12-3x-MM; See page 8.650.1




EC12-34 Flow vs. Pressure



EC12-34 Valve Dimensions



Cartridge: Weight: 0.42 kg (0.92 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups

Standard Ported Body: Weight: 1.13 kg
(2.5 lb); Anodized high-strength aluminum
alloy, rated to 207 bar (3000 psi); Ductile iron
bodies available; dimensions may differ.
See page 8.012.1_3w



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