What Is a PE One-Way Degassing Valve?

PE degassing valves: uses and selection

PE degassing valves release gas from a package while limiting air entering from outside. Select a valve together with the bag material, heat-sealing equipment, dimensions and opening and closing pressures.

The PE One-Way Degassing Valve is a plastic valve specifically designed to control one-way gas release while preventing external air from entering the packaging. It is commonly used in the packaging of coffee beans, powdered foods, fermented products, and more.
“PE” refers to the Polyethylene material used to make the valve body, which offers the following properties:

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Structure and Function of a PE One-Way Degassing Valve

• One-way degassing function

  Allows gases generated inside the package (e.g., from coffee bean degassing) to be released, preventing the package from swelling or bursting.

• Blocks external air

  Prevents oxygen, moisture, and odors from entering, extending product freshness.

• Made of Polyethylene (PE)
  1. High chemical stability, suitable for food packaging
  2. Recyclable and relatively eco-friendly
  3. Moderate melting point, easy to seal with plastic bags

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Common Applications

• Coffee bean packaging
• Grains and animal feed
• Fermented products (e.g., kimchi, miso)
• Industrial powder packaging (to prevent swelling from internal pressure)

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Advantages of PE Material

• Relatively low cost
• Cost-effective for mass production
• Compatible with various plastic film laminates
• Meets food-contact safety standards