fep gas sampling bags
SDLABIO FEP Gas Sampling Bags - Image 2
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fep gas sample collection bags
fep gas sample bags
fep gas sample bag
fep gas sample bag with clip valve
fep gas collection bag

SDLABIO FEP Gas Sampling Bags

SDLABIO FEP gas sampling bags are made of fluorinated ethylene propylene (FEP) film and are ideal for collecting and storing high-purity gases, trace analytical samples, and corrosive gases in laboratories and industry.

FEP Gas Sample Bags For Sale:

0.5L, 1L, 2L, 3L, 4L, 5L, 10L.

MOQ: 1 CARTON.

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FEP Gas Sampling Bags For Sale

Specification Valve quantity Valve material Size(cm)L*W
0.5L fep gas sampling bags Single/Double valve PP/PTFE valve 16*16
1L fep gas sampling bags 21*20
2L fep gas sampling bags 25*24
3L fep gas sampling bags 28*25
4L fep gas sampling bags 33*30
5L fep gas sampling bags 40*30
10L fep gas sampling bags 50*33

Feature Of FEP Gas Sample Collection Bags

  • Manufactured from high-quality thickened FEP (Fluorinated Ethylene Propylene) film, the gas sampling bag offers excellent resistance to acids, alkalis, and organic solvents. With a melting temperature up to 260°C, it provides outstanding chemical inertness and low adsorption properties for demanding gas sampling applications.
  • The thickened film structure provides excellent abrasion resistance, impact resistance, and tear strength, ensuring reliable performance and extended service life even in challenging sampling environments.
  • FEP material features low permeability to liquids, moisture, gases, and organic vapors, effectively minimizing sample loss and maintaining sample integrity during storage and transportation.
  • Advanced sealing technology and precision heat-sealing processes ensure strong and durable sealing performance, effectively preventing gas leakage and improving sampling accuracy.
  • Ideal for ppm- and ppb-level gas analysis, the FEP gas sampling bag is suitable for collecting and preserving various corrosive and chemically active gaseous samples, including volatile organic compounds (VOCs).
  • Available with PP/PTFE single-valve or double-valve configurations, allowing flexible selection according to different sampling, transfer, and analysis requirements.

FAQ of FEP gas sampling bags

Can FEP/teflon gas sample bags be reused?

FEP gas collecting bags are designed for high-purity applications. In most cases, they are recommended for single use to avoid contamination. For certain non-reactive gases, they may be reused after proper cleaning, but for trace analysis, new bags are always recommended.

1. Polyester Gas Sampling Bags

  • Features: Made of PET film, cost-effective and widely used for routine air sampling.
  • Advantages:
    • Low cost, suitable for disposable applications.
    • Good for common atmospheric gases such as CO₂, O₂, N₂.
  • Limitations:
    • Higher permeability compared to fluoropolymer bags.
    • Limited storage time; not ideal for VOCs or sulfur compounds.
  • Applications: General environmental air monitoring, short-term collection.

2. Tedlar (PVF) Gas Sampling Bags

  • Features: Made of polyvinyl fluoride (PVF), often branded as Tedlar®, recommended by the U.S. EPA.
  • Advantages:
    • Excellent stability for VOCs, CO, CO₂, H₂S, and other common gases.
    • Chemically inert, with low background contamination.
    • Resistant to high temperatures (up to ~107°C).
  • Limitations:
    • Less resistant to highly corrosive gases like concentrated HCl or HF.
    • Higher cost than polyester bags.
  • Applications: EPA standard methods, VOC analysis, indoor air quality monitoring, industrial emissions testing.

3. Aluminum Foil Gas Sampling Bags

  • Features: Multi-layer composite with aluminum foil, providing complete gas barrier protection.
  • Advantages:
    • Excellent impermeability, ideal for light-sensitive and trace-level gases.
    • Prevents sample degradation due to light exposure.
  • Limitations:
    • Less flexible, prone to creasing.
    • Compatibility issues with some sampling instruments.
  • Applications: Trace analysis, sampling of light-sensitive VOCs or rare gases.

4. FEP/Teflon Gas Sampling Bags

  • Features: Made of fluorinated ethylene propylene (FEP), a high-performance fluoropolymer.
  • Advantages:
    • Exceptional chemical inertness, compatible with most reactive and corrosive gases.
    • Very low permeability, suitable for long-term storage.
    • Wide temperature range (-70°C to +200°C).
  • Limitations:
    • Relatively expensive.
    • Softer film with lower mechanical resistance.
  • Applications: High-purity gases, corrosive gases (SO₂, H₂S), trace-level environmental monitoring.

5. PVDF Gas Sampling Bags

  • Features: Made of polyvinylidene fluoride (PVDF), a fluoropolymer with properties between PVF and FEP.
  • Advantages:
    • Stronger acid and alkali resistance compared to PVF/Tedlar®.
    • Low permeability and good mechanical strength.
    • Suitable for a wide range of VOCs.
  • Limitations:
    • Higher cost than Tedlar bags.
    • Less stable than FEP under extreme temperatures.
  • Applications: VOC monitoring, industrial exhaust sampling, corrosive gas analysis.

Suitable for the collection of carbon monoxide (CO), sulfur dioxide (SO₂), hydrogen sulfide (H₂S), hydrogen bromide, benzene, mercaptan hydrocarbons, chlorinated solvent gases, photosensitive compounds, and halogenated volatile organic compounds (VOCs).

Can be used for short-term storage of low-concentration (ppm, ppb levels) corrosive gases and chemically reactive gases (after pre-saturation treatment).

Not suitable for the sampling of gases such as fluorine gas, acetylene, and ethylene oxide.

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