LEFC
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Catalog excerpts

LARGE ELECTRONICALLY ADJUSTABLE PROPORTIONAL PRESSURE COMPENSATED FLOW CONTROL “LEFC” CONTROLLED FLOW (CF) TANK (10 PSI MAX BACK PRESSURE) PRECISION GROUND HEAT TREATED SPOOL that assures long life. DIAMOND HONED SPOOL BORE provides consistent spool fit with low leakage. EVERY LEFC IS TESTED for linearity and pressure compensation. STANDARD 3-PORT allows for pressure compensated flow out of two ports. OPTIONAL MANUAL OVERRIDE when electrical power is lost. See flow chart for capacity. Max. 3000 psi cartridge input pressure. Nominally Rated for 3000 psi (207 bar). Tank Port - #4 SAE (10 psi (0.69 bar) MAX. back pressure) Weight 32–3/4 lbs. (14.9 kg). 25-Micron Filtration or Better. Coil 12 VDC standard. 10.4 Ohms. 14 Watts. 1.15 Amp max. Rated 100% continuous duty cycle Pulse Frequency (90 to 110 Hz) Operating Temperature: -20 to 210F (-30 to 100C) Cast Iron Body. Heat Treated Steel Spools. Buna N O’Rings.

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LEFC – GENERAL INFORMATION The Brand, LEFC (large electronically adjustable proportional pressure compensated flow control) is an electronically controlled version of the original large FC51 style flow control valve. The LEFC performance as a flow control is very similar to the large FC51 because they both use the same spring and compensator spool. Thus, the control flow port (CF) and the excess flow port (EX) remain usable and pressure compensated. The main advantage of the LEFC over the large FC51 is that the flow can be adjusted proportionally with a solenoid instead of manually. The...

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LEFC FLOW & PRESSURE INFO: Current vs. Dial Plate for EC-12-01, EC-12-01L and EC-12-02 Controlled Flow vs. Solenoid Current 45 gpm Valve with 50 gpm Input Solenoid Current (amps) Pressure Drop vs. Flow for 45 gpm Valve 0 SCHEMATIC DRAWING: CF-CONTROLLED FLOW PRIORITY PORT, PRESSURE COMPENSATED Pressure Drop vs. Flow for 55 gpm Valve Dial Plate (Percent) EX-EXCESS FLOW IS PRESSURE COMPENSATED. THE FLOW CAN BE USED TO DO WORK OR RAN BACK TO TANK. EC-SERIES ELECTRONIC CONTROLLER #4 SAE TANK PORT (10 PSI MAX BACK PRESSURE) VOLTAGE SOURCE PUMP LEFC VALVE Readings may vary slightly for every...

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