Flow Control Valve features electronically adjustable design.

Press Release Summary:

With Model LEFC, flow can be adjusted proportionally with solenoid rather than manually. Orifice spool proportionally opens as current through solenoid increases, thus increasing flow out of control flow port. Valve features precision ground, heat treated spool; diamond lapped spool bore; and optional manual override when electrical power is lost. Standard 3-port model allows for pressure compensated flow out of 2 ports.

Original Press Release:

Large Electronically Adjustable Proportional Pressure Compensated Flow Control



o DIAMOND LAPPED SPOOL BORE provides consistent spool fit with low leakage.

o EVERY LEFC IS TESTED for linearity and pressure compensation.

o STANDARD 3-PORT allows for pressure compensated flow out of two ports.

o OPTIONAL MANUAL OVERRIDE when electrical power is lost.


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 orifice spool proportionally opens as the current through the solenoid increases, thus increasing the flow out of the CF port (similar to positioning the rotary side lever on the manual FC). The solenoid is connected to our optional EC - series controls which can be sold with the LEFC. Please see the Electronic Controllers section for your control needs. We also give the choice of coil voltage, coil terminal and maximum flow setting.

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