A.Y. McDonald’s multi-stage NEMA motor is a heavy duty, capacitor start, dual voltage (230/115) with built-in overload protection. Motors are NEMA standard construction, coupled shaft design and available in both single and three-phase. Choice of 3/4, 1, and 1 1/2 HP. Precision machined Cast Iron Diffusers for greatest efficiency. Two stage construction provides pressures to 60 PSI for high pressure applications. Housing and adapter are cast iron. Trouble-free (carbon-ceramic) seal.