Devex Foil bag PTFE valve
Devex film with international advanced technology specifically for making high quality gas sampling bags. Devex is very low background,little contamination and good elasticity ,can satisfy foreign customers high requirements.
New Devex film is composed of total 11 layer films (PET, PA, Aluminum, PE, etc) with thickness around 75um thinner than Aluminum foil( multilayer ) film and better elasticity,can’t become hard–brittle when cold like Aluminum–foil(multi–layer) film, it has superb strength and low permeability,meanwhile it possesses excellent chemical inertness and stability. Especially when Aluminum–foil(multi–layer) film cannot meet the requirements and using fluorine polymer film cost too much,Devex gas sampling bag is the best choice. Devex film is superior to Aluminum–foil composite film,so Devex gas sampling bag is of the most highly cost effective
Multi-Layer Foil
Ideal for sampling and storing H2S, and for low molecular weight compounds such as Methane, CO/CO2, Hydrogen, and inert gases which are not stable in Tedlar, Kynar, or FEP. Water- and vapour-proof, these flexible bags protect light sensitive compounds. Bags are available with several fitting and valve options. They provide up to five day sample stability with minimal absorption.
Features:
• composed of total 11 layer films
• very low background,little contamination and good elasticity
• superb strength and low permeability
• excellent chemical inertness and stability
• wide range of applications
• low price and highly cost effective
• Normal Aluminum-foil multi-layer film is glued of solvent adhesive,can volatile a large number of organic volatile impurities that can pollute the sample gas no doubt,Devex film is glued of environmental protection adhesive,amount of organic volatile chemicals(VOCs)by inner layers is extremely low,thereby avoid the sample gas being polluted and prevent the interference of analysis data.The organic solvent remnant amount of Devex film is 0.1mg~0.3mg/m2,which is 5% of Aluminum-foil multi-layer film,so Devex film is the ideal high performance substitute for Aluminum-foil multi-layer film.
