Posi-flate
Stainless steel butterfly valve seals with inflatable seat
The Posi-flate butterfly valve with a highly polished 316 stainless-steel housing and disc (photo) is suitable for many applications, such as food, chemical and pharmaceutical manufacturing. The inflatable seat design of this butterfly valve provides a better seal by utilizing air pressure to expand the seat against the disc, providing more sealing area and an even pressure distribution against the disc every time. The seat automatically compensates for wear when it inflates against the disc, extending valve life considerably. Because the Posi-flate disc only makes casual contact with the seat during opening and closing, torque requirements are substantially lower. The Posi-flate stainless-steel butterfly valve is available in sizes ranging from 2 to 20 in. — Posi-flate, St. Paul, Minn.