Available from 15-335 hp, Sigma Frequency Control provides flows from 17-1,568 cfm in pressures from 80-217 psi. These variable-speed drive, rotary screw compressors employ drive control technology that offers pressure control to ±2 psi with operation from 100% down to 20% load. Packages include Sigma Profile airend, super soundproofed enclosure, EPAct-compliant TEFC motors, and Sigma Control or Sigma Control Basic system.