Corrosion resistant construction. Pumps offer maximum resistance to aggressive chemicals. MAx temperature with water: CPVC -180°F; polypropylene -200°F; PVDF -260°F. Ports are standard NPT sizes with OD dimensions for attachment of socket fittings by solvent welding. Seals are John Crane Type 21 with carbon/ceramic seal faces. Viton® seal components and O-rings. Motors are totally enclosed with oversized, heavy duty bearings. NEMA C face,56 frame. Operation: Pumps must be primed and are best suited for operation with a flooded suction. Pumps should not be run dry; damage may result if operated without fluid or if improperly primed. NOT SELF-PRIMING. All pumps have a 316 SS Shaft, and 3450 RPM.