Kynar PVDF gas sampling bag 

        Kynar film is polyvinylidene fluoride membrane,that is PVDF film,Arkema company's brand name is Kynar PVDF.Our Kynar Polyvinylidene fluoride PVDF film is made of 3-mil transparent PVDF films supplied by a renowned manufacturer in the United States.Our PVDF film has excellent chemical stability, corrosion resistance, low adsorbability and low permeability, so our Kynar PVDF bags are suitable for low background level gas analysis such as VOCs and sulfur compounds when the bags are equipped with appropriate valves or fittings. The monomer atomic aggregate form of Kynar PVDF and Tedlar PVF is very close,but PVDF's fraction of fluorine atoms is greater than PVF's,so PVDF's chemical property is stronger than PVF's and physical mechanical property is close.PVDF film is used for making gas sampling bags as early as 1990 in the USA.We offer PVDF gas sampling bags with stopcock straight valve, side-opening stopcock valve, PTFE straight valve, PTFE straight valve with PTFE fitting, Side-opening PTFE valve, Side-opening PTFE valve with PTFE fitting.

Features:

• excellent chemical stability and resistance

• strong physical property and low adsorbability
• superb strength and low permeability
• heat-resistance temperature is 150℃～170℃

Applicable scope:

      Kynar PVDF gas sampling bags can be used in high precision of PPM and PPB level sample analysis,can sample and save all kinds of highly corrosive and chemical active gaseous,liquid samples.

• Standard Kynar PVDF Gas Sampling Bag Sizes:

0.5L,1L,2L,3L,4L,5L,8L,10L,15L,20L,30L, 40L～6000L or customized size.

Precautions:

• The sample gas in sampling bag to save time should not be too long, specific saving time depend on detection limit of experimental analysis requirement,gas component species,temperature and humidity,pressure, etc: generally, for pure inert gas, sampling bag can be used as a temporary storage container and recommended storage time less than 72 hours; for standard gas,flue gas,ambient atmosphere, recommended storage time less than 24 hours.
• The gas sampling bag should be cleaned repeatedly replacement if it is reused. Suggest the same sample bag collecting samples of the same kind gas, don't mix.
• High purity nitrogen gas heating replacement can reduce the interference of organic deposition.
• 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.The overpressure filling can cause gas sampling bag burst damage.
• When sampling and cleaning, please do not exceed 80% of the calibration volume, take 1L sampling bag for example, suggest sampling volume is less than 0.8 L.