PVDF gas sampling bags
PVDF gas sampling bag

SDLABIO PVDF Gas Sampling Bags

SDLABIO PVDF Gas sampling bags are manufactured from polyvinylidene fluoride (PVDF) film, a high-performance gas sampling consumable. PVDF film combines excellent chemical inertness, low gas permeability, and good mechanical strength, ensuring that gas samples remain in their pristine state during collection, transport, and analysis.

PVDF Gas Sampling Bags For Sale:

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

MOQ: 1 CARTON.

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PVDF Gas Sampling Bags For Sale

Specification Valve Valve material
0.5L PVDF gas sampling bags Single valve /Dual valve PTFE valve
1L PVDF gas sampling bags
2L PVDF gas sampling bags
3L PVDF gas sampling bags
4L PVDF gas sampling bags
5L PVDF gas sampling bags
10L PVDF gas sampling bags

Feature Of PVDF Gas Sample Bags

  • Manufactured from high-performance polyvinylidene fluoride (PVDF) film, offering outstanding chemical stability and durability.
  • Provides excellent chemical and solvent resistance, combined with extremely low sample adsorption and low gas permeability to help preserve sample integrity.
  • Compared with PVF, PVDF offers superior chemical stability while maintaining comparable mechanical strength and flexibility.
  • With a maximum operating temperature of 150°C, it is suitable for a wide range of demanding sampling applications.
  • Designed for high-precision ppm- and ppb-level gas analysis and sampling, making it ideal for collecting and storing highly corrosive and chemically reactive gas and liquid samples.

FAQ of kynar gas sampling bags

Can PVDF plastic bags be reused?

Yes, PVDF bags can be reused after thorough cleaning for non-reactive gases. For corrosive or reactive gas samples, single-use is recommended to ensure data accuracy.

  • Inflation Pressure: The recommended inflation pressure is ≤3 kPa. Inflate the bag until fully expanded while maintaining slight flexibility when gently pressed. Avoid over-inflation.
  • Operating Temperature: -60°C to +100°C.
  • Storage and Handling: Keep away from open flames, heat sources, and sharp objects to prevent damage or puncture.
  • Gas Purging: Before filling with calibration gas or collecting samples, purge the gas sample collection bags 2–3 times with the target gas to minimize residual contamination.
  • Sample Mixing: Before analysis, gently knead and shake the bag for approximately 3 minutes to ensure sample homogeneity.
  • Needle Sampling: The high-elasticity septum is designed for syringe sampling. After withdrawing the needle, gently press and massage the septum to help reseal the puncture site and maintain an airtight seal.

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.
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