Prater Industries; 630-759-9595; www.praterindustries.com
The Prater heavy-duty PAV airlock handles most dry, free-flowing powders where a pressure differential exists. It is constructed from stainless steel or cast iron, allows up to +/- 12 psi pressure differential and withstands temperatures up to 500°F with standard components. Optional coatings or construction materials and high-temperature kits are available. Equipped with chain drive gear motors and a choice of speeds, the unit comes in 6 sizes. The airlock features a 1-piece cast body with reinforcing ribs.