Rotary Airlock is one of the Top 5 Manufactures of new valves and the #1 Rebuilder right here in the USA. Built to keep runtime up and maintenance down, we offer the highest quality and lowest lifetime cost of ownership in the industry. From ceramic linings to stainless steel, diatomaceous earth to sugar processing, our NEW valves are drop-in replacements and engineered to handle the demands of any manufacturing process right from the start.