Electromagnetic Pump Systems for Aluminum, Zinc, Sodium, and Mercury. Magnesium pump coming soon. The PG series pumps for aluminum and zinc are carefully constructed from composite ceramics. These pumps contain no solid moving parts. The semi-submersed pumps draw filtered molten metal from well below the bath surface. The metal moves smoothly, without turbulence, through heated launder tubes into molds, shot sleeves, or tundishes, with minimal atmospheric contact. Operator handling is minimized, and dross and gassing are eliminated. Metal delivery is a controlled, laminar flow, and the bath temperature is retained. The linear annular LA series electromagnetic pumps are manufactured for Sodium and Mercury.