06/16/2026
The Posi-flate butterfly valve gatelock, or double dump valve assembly, is a low cost and low maintenance alternative to the traditional rotary airlock feeder. It provides a positive seal that can accommodate either full vacuum or pressure up to 100 PSIG.
The Posi-flate butterfly valve seat automatically inflates against the disc to provide a long-lasting, high integrity seal even when handling abrasive materials such as sand.
https://www.youtube.com/watch?v=8H7zMVl4q14
The Posi-flate gatelock butterfly valve airlock, or double dump val...