DURAN® Membrane Venting Screw Cap, PP, blue
with welded-in expanded PTFE filter membrane, for autoclaving bottles, or cap for cell culture flasks offering high rates of gas exchange
- Pressure equalisation during steam sterilisation / autoclaving at 121 °C. The microporous structure of the ePTFE membrane enables sterile gas exchange in two directions, while blocking the penetration of liquids or particles and the bottle contents remain sterile
- Increased gas exchange rate due to thin 0.2-µm ePTFE membrane, combined with larger ventilation openings. Higher gas exchange rates for cell culture applications in bottles and shaker flasks. Maintaining the necessary gas environment (CO2 and O2) for cell growth in incubator culture
- Cost effective as the caps can be reused several times (Replacement is recommended after 3 to 5 autoclave cycles due to durability, or if the membrane becomes damaged or contaminated)
- Polytetrafluoroethylene (ePTFE) membrane (conforms wth USP 121 °C Class VI requirements) with polypropylene support mesh are ultrasonically welded in place forming a durable seal
Products
| Catalog No | Thread | Hole ID (mm) | Diameter d (mm) | Height h (mm) | Quantity | |
|---|---|---|---|---|---|---|
| 291181307 | GL 25 | 1 vent hole 5.5 mm | 33 | 19 | 5 | Find a distributor |
| 291181907 | GL 32 | 1 vent hole 8 mm | 41 | 24 | 5 | Find a distributor |
| 291182809 | GL 45 | 3 vent holes each 9 mm | 54 | 25 | 5 | Find a distributor |
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
DURAN® membrane venting screw caps can be used for safer autoclaving of media, or in cell incubator culture requiring high rates of gas exchange. The screw cap can be tightly closed as the membrane permits an automatic sterile gas exchange, allowing safe pressure equalisation during the autoclave cycle, and at the same time ensuring the sterility of the bottle contents. Large exposed sterile-filter surface area allows efficient gas exchange rates (a pressure differential of 0.1 Bar is required) for cell culture applications in bottles and shaker flasks. DURAN® Original GL Screw Capped Laboratory bottles are ideal containers for sterilising and storing sterile media or buffer solutions. However, it is strongly recommended that during the autoclaving cycle the caps are only loosely tightened. Heating times are reduced if the steam is easily able to penetrate the contents of the bottle. Loose caps also reduce the risk of failure due to pressure build up inside the bottle, which can reach 400 kPa (absolute). In addition, tightening the screw caps immediately after autoclaving, will result in a vacuum caused by the cooling of the steam. This can lead to bottle failure, and is an especially important consideration for larger bottles. To overcome these limitations, the sterile venting membrane screw caps were developed. Membrane caps with hydrophobic PTFE membranes, facilitate optimal gas exchange by allowing gases like oxygen and carbon dioxide to pass through while preventing microbial contamination.
Related Products
Products
Products
| Catalog No | Thread | Hole ID (mm) | Diameter d (mm) | Height h (mm) | Quantity | |
|---|---|---|---|---|---|---|
| 291181307 | GL 25 | 1 vent hole 5.5 mm | 33 | 19 | 5 | Find a distributor |
| 291181907 | GL 32 | 1 vent hole 8 mm | 41 | 24 | 5 | Find a distributor |
| 291182809 | GL 45 | 3 vent holes each 9 mm | 54 | 25 | 5 | Find a distributor |
Specification
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Product Overview
DURAN® membrane venting screw caps can be used for safer autoclaving of media, or in cell incubator culture requiring high rates of gas exchange. The screw cap can be tightly closed as the membrane permits an automatic sterile gas exchange, allowing safe pressure equalisation during the autoclave cycle, and at the same time ensuring the sterility of the bottle contents. Large exposed sterile-filter surface area allows efficient gas exchange rates (a pressure differential of 0.1 Bar is required) for cell culture applications in bottles and shaker flasks. DURAN® Original GL Screw Capped Laboratory bottles are ideal containers for sterilising and storing sterile media or buffer solutions. However, it is strongly recommended that during the autoclaving cycle the caps are only loosely tightened. Heating times are reduced if the steam is easily able to penetrate the contents of the bottle. Loose caps also reduce the risk of failure due to pressure build up inside the bottle, which can reach 400 kPa (absolute). In addition, tightening the screw caps immediately after autoclaving, will result in a vacuum caused by the cooling of the steam. This can lead to bottle failure, and is an especially important consideration for larger bottles. To overcome these limitations, the sterile venting membrane screw caps were developed. Membrane caps with hydrophobic PTFE membranes, facilitate optimal gas exchange by allowing gases like oxygen and carbon dioxide to pass through while preventing microbial contamination.
Related Products
Related Products