DURAN® Membrane closure, GLS 80, PP, blue , for laboratory glass bottles ePTFE pore sizes 0.2 µm

DURAN® GLS 80® membrane vent screw cap, wide neck, PP, blue DURAN® Original GL laboratory bottles with screw cap are ideal containers for sterilization and storage of media or buffer solutions. However, it is strongly recommended that caps are only loosely screwed on for the autoclaving cycle. The heating time is reduced if the steam can penetrate the bottle contents more easily. Loosely fitted caps also reduce the risk of breakage due to pressure build-up in the bottle, which can reach up to 400 kPa (absolute). In addition, if the caps are tightly screwed on immediately after autoclaving, a vacuum caused by steam cooling will occur. This can lead to bottle breakage and is therefore essential to consider, especially for larger bottles. To overcome these limitations, the vent screw caps with ePTFE membrane have been developed. The screw cap can be tightly closed as the membrane allows automatic sterile gas exchange and thus safe pressure equalization during the autoclaving cycle, while ensuring sterility of the bottle contents. Special features and benefits: Pressure equalization during steam sterilization The microporous structure of the membrane made of ePTFE allows sterile gas exchange in two directions, but prevents the ingress of liquids or solids and the bottle contents remain sterile The PTFE membrane and its polypropylene mesh backing are ultrasonically welded to form a durable seal The PTFE membrane and its polypropylene mesh backing are ultrasonically welded to form a durable seal Cost-effective, as the caps can be reused several times (replacement is recommended after 3 to 5 autoclaving cycles, or if the membrane is damaged or contaminated) Compatible with all GLS 80 threads and therefore versatile Application: Autoclaving of media and buffer solutions, storage and transport of sterilized media, storage and transport of gas-forming media, short-term storage of sterilized media, storage of media and reagents