|Place of Origin:||China|
|Model Number:||Tedlar PVF|
|Minimum Order Quantity:||10pcs|
|Delivery Time:||4 days|
PVF Gas Sampling Bag
PVF film is tougher and more economical than FEP, and is commonly used in vehicle emission testing.
*No contamination of gas sample
*Easily cleaned for re-use by gas flushing
*Very low permeation of gases through the wall of the gas sample bag
*Wide range of sizes *Special designs for unusual requirements
*Large capacity chambers *Internal manifolds if required
Standard TEDLAR Gas Sampling Bag Sizes:0.5L,1L,2L,3L,4L,5L,8L,10L,15L,20L,30L,and 40L or customized size.
PTFE straight valve and Side-opening PTFE valve
It is made of polytetrafluoroethylene (PTFE). The patented design utilizes mouldeling, self-sealing mechanism, no O-ring is inside therefore cross-contamination is eliminated. The PTFE valve can handle gases that there is not corrosive to PTFE. The valve can be used in VOCs analysis.
Stopcock straight valve
It’s made of medical grade polycarbonate (PC) with 6mm connector. Valve stem (connector) is vertical to the surface of film. The valve utilizes patented technology. The valve body and cock are modeled and polished so that the valve does not need lubricant and sealing part, the cross-contamination is eliminated.The valve not only has on/off function but also can control flow rate. When turn handle toward the connector, the valve is open. The valve is closed when the handle is turned vertically to the connector. The crewed connector has cap with silicone septum in it, which is convenient for sampling. Since the valve does not introduce any potential contamination, it can be used for VOC analysis.
It has similar functions to the stopcock valve . The difference is the connector it horizontal to the surface of bag. The sampling cap is opposite to the connector. This patented design is convenient for filling and sampling gas.
O1.Avoid filling pressure higher than 6000Pa. Fill gas until the bag is fully expanded, however, it is not so tense when you press it using your finger.
2.Keep away from flame and high temperature when filling and storage. Avoid contacting sharp stuff.
3.Before use, flush sampling bags three times with the gas you want to fill.
4.When using a needle to draw gas from highly elastic septum, squeeze the septum with fingers in order to restore the sealing property after pulling out the needle.
5.Working temperatures should be -60°C to +150°C for PTFE connector and -20°C to +80°C for stopcock valve
Our PVF gas sampling bags are made of 2mil DuPont's Tedlar® film. Tedlar® film is strong, durable, and considered chemically inert to a wide range of compounds. Tedlar gas sampling bags are accredited by regulatory agencies in different countries and widely used indoor air sampling, waste processing yard gas sampling, soil sampling and other environmental protection application. Our TEDLAR sampling bags come with renovated, patented valves. Valve materials are polycarbonate or PTFE.
Depending on inlet orientation, there are two types of valves. One type is that the inlet in vertical to the film; other one is horizontal to the film. Both valves have the same functionalities: it has on/off function; has a cap with septum in it for sampling purpose. Both valves are easy to use. One advantage of horizontal valve(side opening) is to use less storage space.
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thanks for your understanding !