Ammonia mini screw compressor Direct coupled to a US Electric AC motor. 3 ph, 50 or 60 Hz, 460 Volts 226 FLA ID # D08-H534A-H and Catalog # D250E1FS Model # H634A On board mounted Vilter Microproccessor control system. Tank rated 300 PSIG @ -20 to 400 degrees F.