OSZS Multi-layer foil gas sampling bag w/Dual twist-type straight valve & septum fitting, 1L, 10-pk.
The OSZS multi-layer foil gas sampling bag (Multifoil gas sampling bag) provides an economical and reliable solution for air sampling. Constructed with a composite material comprising nylon membrane (PA), aluminum foil (AL), and polyethylene film (PE), these layers are bonded using a two-component adhesive. This design is specifically engineered to safeguard light-sensitive gas samples, making it ideal for standard gas sampling and filling applications where chemical stability is crucial. These applications include oil-cracking gas, natural gas, coal bed gas, flue gas, ambient air, process reaction gases, and inorganic gases such as nitrogen, hydrogen, oxygen, and argon.
The material's chemically inert properties ensure that it does not interfere with or contaminate the collected air samples. It offers robust protection against light and moisture, while also providing exceptional physical strength and chemical stability. The bag is opaque, features low adsorption and permeability, and is completely airtight.
The innovative seam construction enhances durability, and the heat-sealed seams ensure a leak-proof performance.
These sampling bags are an effective and economical choice for air sampling of high-level volatile organic compounds (VOCs) and permanent gases. They are extensively used in petrochemical industries, environmental protection efforts, and scientific research institutions. However, due to the potential for background contamination, they are not recommended for sampling low PPM VOCs.
Standard sizes for the Aluminum-Foil (Multi-Layer) Gas Sampling Bags range from 0.5L to 6000L, with custom sizes and configurations available upon request.
The OSZS dual twist-type straight valve on the multi-layer foil gas sampling bag is constructed from ABS material. The valve stem, which has an outer diameter of 5 mm, functions as the gas conduit.
Rotating the valve stem clockwise causes it to move downward, engaging the lower O-ring and sealing the valve seat, thereby closing the valve. Conversely, rotating the valve stem counterclockwise moves it upward, sealing the upper O-ring against the valve cap, which allows gas to flow through the valve stem and opens the valve.
The travel distance of the valve stem during this operation is minimal. During the transition between open and closed positions, the valve briefly connects with the external environment, causing the gas inside the sampling bag to flow from the valve seat hole into the valve cap chamber and then escape through the valve cap hole. Therefore, it is essential to rotate the valve stem quickly and avoid leaving it in an intermediate position.
When performing gas exchange operations with the sampling bag, the valve must be fully opened, and the valve stem should not be rotated during the process.
The twist-type straight valve is designed for ease of use and is ideal for collecting and preserving inorganic and organic gas samples that are non-corrosive to ABS or silicone rubber.
OSZS provide gas sampling bags free of charge for testing, but the shipping costs are the responsibility of the customer. To ensure you have accurate information on the shipping fees, please send your detailed shipping address and related information to max@oszs.com. We will promptly respond with the relevant cost details.
For all international orders, OSZS requires payment in advance. You can choose to pay via PayPal or wire transfer. Please email max@oszs.com to obtain our account information and further payment instructions. We are committed to providing you with a fast and secure payment service, ensuring your order is processed smoothly.
