The series of constant pressure controls for variable speed pumping applications includes submersible deep well pumps, booster pumps and irrigation pumps.VARIOspeed constant pressuer controls offer an economical, pre-engineered control solution using a factory-programmed variable frequency drive in a NEMA 1 or NEMA 3R enclosure with a user friendly keypad and backlit display for easy installation and setup. They are available in 1.5 through 20 horsepower with LCD display.