Polyfill is a trademark of Worcester Controls High Purity/High Vacuum The Clean Mizer (SeriesWK44) is designed for the pharmaceutical, biotech, food, cosmetic and microelectronics...Special Service Special Service Valves Energy Conservation/High Cycle The Energy Mizer ball valve is ideal for saturated steam handling to 500 psig. Exclusive Polyfill and Highper... experienced with gate or globe valves used in this service are eliminated with the Energy Mizer. In fact, the Energy Mizer is backed by Worcester's 120 day money back guarantee. Available...