OSZS Teflon FEP gas sampling bag w/Side opening stopcock PTFE valve & septum fitting, 1L, 10-PK.
The film of OSZS Teflon FEP gas sampling bags is made from fluorinated ethylene propylene (F46), specifically FEP film, with a thickness of 0.07 mm. The FEP trademark is owned by DuPont Co under the name Teflon FEP. FEP is one of the most chemically inert materials used for manufacturing gas sampling bags, functioning effectively in extreme temperatures ranging from -400°F to 400°F. Its sealing difficulty is significantly greater than that of PVF (Tedlar) and polyvinylidene fluoride (PVDF) films. In 2003, our company successfully addressed the challenge of heat sealing FEP film, producing gas sampling bags for the first time with uniform, flat seals, minimal shrinkage, and high strength.
Teflon FEP film exhibits excellent chemical resistance, withstands strong acid and alkali corrosion, is resistant to organic solvents, and has low adsorption properties, making it inert to most chemicals while demonstrating low permeability that minimizes sample loss. The water vapor permeability of Teflon FEP is 1.3 g/m²·24h·0.1 MPa, and the oxygen permeability is 2400 cc/m²·24h·0.1 MPa (these values are measured, not guaranteed).
All four sides of Teflon FEP sampling bags are heat-sealed to ensure complete chemical resistance and leak-proof operation.
The chemical resistance and corrosion resistance of Teflon FEP are among the best in fluoropolymers, with low adsorption characteristics. Teflon FEP gas sampling bags are suitable for high-precision ppm and ppb level analysis, capable of collecting and preserving various highly corrosive and chemically active gaseous and liquid samples, as well as volatile organic compounds (VOCs). They can also be used for gas sample analysis, extracting air samples from chimney exhaust systems, monitoring air quality, or calibrating instruments in the field.
The side-opening stopcock PTFE valve is made of polytetrafluoroethylene (PTFE). The straight-through PTFE valve features a self-sealing structure, ensuring a tight seal without any rubber components coming into contact with the gas inside the bag, thereby preventing contamination of the gas sample. The gas outlet of the lateral PTFE valve is parallel to the plane of the bag’s film, with an outer diameter of 6 mm. To open the valve, rotate the handle so it is perpendicular to the film plane; to close it, rotate the handle 90 degrees so it is parallel to the plane.
The lateral PTFE valve offers convenient and quick operation, with a compact design and a tightly sealed structure. Its gas outlet can be used for inflation, deflation, and vacuuming. This valve is suitable for filling inorganic or organic gases that do not corrode PTFE. Since the gas inside the bag does not come into contact with silicone rubber seals, it remains uncontaminated, making the PTFE lateral valve ideal for collecting and preserving low-concentration gas samples requiring high analytical accuracy.
The gas sampling bag with this valve has been patented.
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.
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