Abstract: Improvements in bulk storage and handling systems of the type utilizing an inflatable membrane silo liner are disclosed. Included with the inflatable membrane are means for conforming the membrane to the silo or bin walls and means for substantially completing discharge of materials by a bin. The unique features disclosed are equally applicable to bins or silos having central or side discharge openings. Means are provided for avoiding discharge blockage by a membrane and improper membrane positioning during deflation. The invention further provides means for avoiding membrane damage due to improper loading techniques and means for avoiding excessive pressure buildup which might damage the membrane.