Used to storage biogas or other gases. Normal pressure. Long use life. Easy to install. ISO9001:2008 certification. Easy to maintain. Introduction Dual membrane gas holder is our own design and production. We can provide technical research and customizing according to different clients. The company adopt Germany advanced flexible design and production process, has professional production equipments, can manufacture high performance gas holder. Performance and characteristics It is 3/4 sphere or hemispheroid, which is fastened to the cement base by the rail. The main part is made by special processing polyester materials. The tank is composed of outer membrane, inner membrane, basilar membrane and accessory equipment. The inner membrane can anti-corrosion and all kinds of microbes, has the performance of highly fire prevention and accord with the related products standards of Germany. There forms a capacity alterable airtightness space between the inner membrane and the basilar membrane to storage biogas. The outer membrane constitutes the sphere shape of the storage cabinet, which can protect the inner membrane, anti UV, and has self-cleaning function.