- Capacities to 1200 GPM (270m3/hr) - Heads to 450 feet (137 m) - Pumping Temperatures to 350° F (177° C) - Working Pressures to 275 PSIG (1,896 kPa) - Twelve Sizes The M300 Series Pumps are sealless, chemical process pumps built to ANSI/ASME B73.1 dimensions. Features include discharge-to-discharge circulation, silicon carbide bearings, Samarium cobalt rare earth magnets and a Hastelloy-C containment shell. Twelve sizes are available in ductile iron or 316SS construction. Other materials of construction are available upon request.