Waukesha positive displacement pump, model number 30. Unit has 1-1/2" inlet/outlet with sanitary tri-clamp fittings. Driven by 1.5 HP, 230/460V, 3/60Hz, 460 - 2290 rpm vari-speed motor through gearbox with 4.47:1 ratio. Mounted on stainless steel frame. Serial number 163187 95. Missing internal lobes.