The Econ VX has an adjustable potentiometer and the FX is a fixed speed pump.
Both the Econ VX and FX offer a totally enclosed design with a brushed motor for light duty or general intermittent applications. The pumps work well for fluid transfer, sampling or injecting a variety of solutions. Some applications could be metering brighteners or phosphates for metal plating bath solutions or metering corrosion inhibitors or polyphosphates for corrosion and scale control in cooling towers.
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