FEP GAS SAMPLING BAG
FEP(Fluorinated ethylene propylene) film is the most chemically
resistant film in the fluoropolymer family.
Polyfluoro film has superb chemical inertness, ultra low adsorption
and ultra low permeation. Polyfluoro film gas sample bags can
handle and store various highly corrosive and highly active gaseous
and liquid samples. They are widely used in petrochemical industry
and environmental protection areas.
Currently there are three types of poly fluoro films that can be
used to manufacture gas sample bags. Polyvinyl fluoride (PVF) film
has a long history in making gas sample bags. Polyvinylidene
fluoride (PVDF) is another type of poly fluoro film. The third type
of poly fluoro film is called fluorinated ethylene propylene
copolymer (FEP). Both PVF and PVDF films possess excellent chemical
inertness, low gas adsorption and low permeation. FEP film has
superb chemical inertness, ultra low gas adsorption and low
permeability. Only drawback of the FEP film is that the mechanical
strength of FEP is little bit lower than that of PVF and PVDF
films. It does not have any negative impact on as an excellent gas
sample storage material.
Our FEP film used to make gas sample bags is supplied by a renowned
world-class manufacturer. company has strict total quality control
systems in place to assure that all products are high quality. The
designs of fittings are patented; fittings and valves are
manufactured with high precision and convenient to use. To avoid
cross-contamination, there is no any rubber material to contact
with gas sample; and the authenticity and integrity of the sample
are protected during storage. In the circumstance of light and
strength are the factors to be considered, gas sample bags made
from FEP layered with aluminum film are available for better
protection from the light (MF series products, special order).
*No contamination of gas sample
*Easily cleaned for re-use by gas flushing
*Very low permeation of gases through the wall of the bags
*Range of inert connectors for ease of use
Standard FEP Gas Sampling Bag
Sizes:0.5L,1L,2L,3L,4L,5L,8L,10L,15L,20L,30L,and 40L or customized
Side-opening stopcock valve Side-opening PTFE valve plus PTFE
fitting PTFE straight valve plus fitting
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.
Operating instructions for FEP bag
1.Avoid filling pressure higher than 1000Pa. Fill gas until the bag
is fully expanded, however, it is not so tense when you press it
using your finger.
2. A latex or silicon rubber hose should be used to connect to the
analytical instrument from the gas sample bag; meanwhile a clamp
can be used to control the flow.
3. Gas sample can be released or filled through plastic fitting;
Gas sample can be taken by needle from sampling fitting. Vacuum can
be done through sampling fitting. You also can open sampling
fitting for easy flushing. Plastic fittings and sampling fittings
are made of polypropylene.They can handle non-corrosive organic or