NDV61_1L New Devex multi-layer foil gas sampling bags with ABS (L-type)
On/Off Combination valve with side connector 1L air sample bag
Our company Dalian Hede Technologies and professional companies
together researched anddeveloped Devex film with international
advanced technology specifically for making high quality gas
sampling bags. Devex is very low background, little contamination
and good elasticity, can satisfy foreign customers high
New Devex film is composed of total 11 layer films (PET, PA,
Aluminum, PE, etc) with thickness around 75um thinner than
Aluminium foil(multi layer) film and better elasticity,
can't become hard-brittle when cold like
Aluminium-foil(multi-layer) film, it has superb strength and low
permeability, meanwhile it possesses excellent chemical inertness
and stability. Especially when Aluminium-foil(multi-layer) film
cannot meet the requirements and using fluorine polymer film cost
too much, Devex gas sampling bag is the best choice. Being detected
by authoritative organizations Devex film is superior to
Aluminium-foil composite film, so Devex gas sampling bag is of the
most highly cost sffective at home and abroad,and widely used by
Ideal for sampling and storing H2S, and for low molecular weight
compounds such as Methane, CO/CO2, Hydrogen, and inert gases which
are not stable in Tedlar, Kynar, or FEP. Water- and vapour-proof,
these flexible bags protect light sensitive compounds. Bags are
available with several fitting and valve options. They provide up
to five day sample stability with minimal absorption.
composed of total 11 layer films
- very low background,little contamination and good elasticity
superb strength and low permeability
wide range of applications
low price and highly cost effective
- Normal Aluminium-foil multi-layer film is glued of solvent
adhesive, can volatile a large number of organic volatile
impurities that can pollute the sample gas no doubt, Devex film is
glued of environmental protection adhesive, amount of organic
volatile chemicals(VOCs)by inner layers is extremely low, thereby
avoid the sample gas being polluted and prevent the interference of
analysis data. The organic solvent remnant amount of Devex film is
0.1mg~0.3mg/㎡, which is 5% of Aluminium-foil multi-layer film, so Devex film is the ideal high performance substitute for
Aluminium-foil multi-layer film.
Standard New DEVEX Gas Sampling Bag Sizes:
0.5L, 1L, 2L, 3L, 4L, 5L, 8L, 10L, 15L, 20L, 30L, 40L～6000L or
Select from a variety of sizes to suit your needs.
Buy More Save More !
|Product Type||Sampling Bag|
- Devex gas sampling bag can fill the gas being of stable chemical
properties, such as: pyrolysis gas, natural gas, coal bed gas,
smoke dust gas, ambient atmosphere, technological process reaction
gas. It is widely used in petrochemical industry and environmental
monitor etc. for gas sampling and save.Devex gas sampling bag can
ensure that the low concentration (PPM) component is constant for
- Devex gas sampling bag can be used in sampling and detection for
- Devex gas sampling bag can fill low level of hydrogen(H2),
oxyen(O2), nitrogen(N2), argon(Ar), methane(CH4), carbonic
oxide(CO), carbonic dioxide(CO2).
- Devex gas sampling bag is not recommended to use for the gas with
high chemical, corrosivity and strong oxidizing property such as:
hydrogen sulfide, nitrogen oxides, strong basicity gas and halogens
gas or low content component ppb level.
- Devex gas sampling bag apply to lucifuge sampling for
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Operating guide & Precautions:
- 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.
- Operating temperature: －15℃～＋60℃.
- Keep away from flame and high temperature when filling and storage.
Avoid contacting sharp stuff.
- Before use, flush sampling bags three times with the gas you want
- The connection of valve and instrument or the equipment best be
adopted correspongding latex tube or silicone tube transition.
- For sulphide and halogen gas, high content such as the percentage
level or low content such as PPM level are not recommended to use.
- As the composite membrane using two-component adhesive when
manufacturing, it can volatilize benzene, ketones, ethers, esters
and other organics, So we should pay attention to the
Aluminium-foil composite membrane separating out the residual
organics can pollute the sample gas inside the bag,analysis data
can cause interference.
- 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.
- 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.
- High purity nitrogen gas heating replacement can reduce the
interference of organic separating out.
- 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.
- There must be a blank sample bag compare for precise experimental
analysis to do background deduction.
- For high-temperature high-pressure gas should be down to normal
temperature and pressure to sample, specific treatment method
according to actual situation.
- For negative pressure gas, should be sampled by appropriate power
and flow rate vacuum pump.
- For the gas containing particulate matter,dust and aerosols, should
adopt filter to prevent polluting the sample bag, then difficult to
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