OSZS Kynar PVDF gas sampling bag w/Stopcock straight valve & septum fitting, 1L, 10-pk
Kynar membrane, also known as polyvinylidene fluoride (PVDF) membrane, is branded as Kynar PVDF by Arkema. Our Kynar polyvinylidene fluoride (PVDF) membrane is made from 3 mil transparent PVDF film supplied by a well-known manufacturer in the United States. PVDF is a fluorinated polymer or fluoropolymer that can be dissolved, dispersed, foamed, and melt-processed, making it widely used in industrial and construction applications.
Kynar PVDF membranes exhibit excellent chemical stability, corrosion resistance, low adsorption, and low permeability. Kynar® resin can withstand a variety of chemicals, including most acids and acid mixtures, weak bases, halogens, halogenated solvents, hydrocarbons, alcohols, salts, and oxidizers. At ambient temperatures, PVDF homopolymer typically tolerates chemicals with a pH level of up to 12.
The monomer atomic assemblies of Kynar PVDF and Tedlar PVF are very similar; however, the fluorine atom fraction in PVDF is greater than that in PVF, resulting in stronger chemical properties for PVDF. Kynar® is notably strong and tough, with a yield tensile strength at room temperature ranging from 35-55 MPa (5,000-8,000 psi) and a notched impact strength of 800-4270 kJ/m (15-80 ft-lbs/in), closely resembling the physical mechanical properties of Tedlar PVG.
Thus, when equipped with appropriate valves or fittings, our Kynar PVDF bags are suitable for the analysis of low background level gases such as VOCs and sulfur compounds. The characteristics of Kynar PVDF bags include:
PVDF bags can withstand ultraviolet light, humidity, and high temperatures.
The maximum operating temperature of the product is 73 degrees Celsius.
The product is durable and reusable.
Samples can be safely stored for up to 72 hours.
We offer PVDF gas sampling bags with stopcock straight valves, side-opening stopcock valves, PTFE straight valves, PTFE straight valves with PTFE fittings, side-opening PTFE valves, and side-opening PTFE valves with PTFE fittings. 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 stopcock straight valve on the Tedlar PVF gas sampling bag is positioned perpendicular to the film surface, with an external sampling tube featuring an outer diameter of 6 mm. The stopcock straight valve is designed with a self-sealing mechanism, ensuring a secure seal without any rubber components coming into contact with the gas inside the collection bag, thereby eliminating the risk of sample contamination.
The valve includes a sampling cap fitted with a silicone rubber septum, with the septum's exposure to the gas inside the sampling bag regulated by the valve. The silicone septum only interacts with the gas when the valve is in the open position. To extract a gas sample using a sampling needle, rotate the valve handle so that it aligns with the sampling cap. This action allows the gas inside the bag to come into contact with the silicone septum. After completing the sampling process, rotate the valve handle 90 degrees to close the valve, effectively isolating the gas inside the bag from the septum.
This design minimizes prolonged contact between the silicone rubber septum and the gas sample, reducing the risk of septum corrosion by the gas or contamination of the gas sample by the septum.
OSZS provides 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.
