SERIES 120 centrifugal pumps are close-coupled to standard NEMA JM motors. A special adaptor protects the motor. All models are available in cast iron with a bronze impeller. All fasteners are stainless steel to reduce corrosion. Enclosed impellers are dynamically balanced to improve efficiency and bearing life. Standard carbon / ceramic / Viton mechanical seal is self-adjusting and corrosion resistant to handle almost any liquid.