Posi-flate
These butterfly valves have inflatable seats
This company is exhibiting a heavy-duty inflatable-seated butterfly valve operating next to a typical resilient-seated valve to demonstrate how quickly a resilient-seated valve can wear in comparison to the air-operated valve. The inflatable seat design 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. The Series 585/586 inflatable-seated butterfly valve (photo) is designed for the most severe applications. The heavy-duty seat has been designed for higher operating pressures and temperatures. The valve is ideally suited for very abrasive materials such as sand, feldspar, flyash and most other dry, granular materials, which can reduce valve life. Hall 3, Stand 301. — Posi-flate, Milton Keynes, U.K.