www.thedriller.com/articles/89942-sje-rhombus-variospeed-constant-pressure-controls
SJE Variospeed

SJE-Rhombus VARIOspeed Constant Pressure Controls

March 16, 2015
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.   www.sjerhombus.com