Disposable membrane

An apparatus comprising a chamber for physically and/or chemically treating one or more samples or products, said apparatus further comprising a door adapted for moving between a closed position and an open position for introducing the one or more samples or products inside the chamber or bringing the one or more samples or products outside the chamber, said apparatus further comprising a membrane or film for isolating the chamber from the outside atmosphere, said membrane or film defining a chamber wall inside said apparatus when the door is in the closed position, said membrane or film including a sealable passage for passing the one or more samples or products through the membrane or film into the chamber, wherein said membrane or film comprises a proximal end and a distal end, said proximal end comprising an inlet to the passage and said distal end defining a section essentially complementary to a periphery of said chamber, said distal end of said membrane or film comprising a fold in which an inflatable seal is inserted, said fold being inserted in a channel extending along the periphery of the chamber to isolate a chamber inner part from a chamber outer part.