Degassing valves for containers

By: Agencia Boll

Degassing valves for containers

Gas control, product protection, and container stability

Degassing valves allow the release of gases generated inside the container without compromising the barrier against oxygen, moisture, or external contaminants.
They are a key technical component in packaging for coffee, pet food, and products with post-packaging gas release.

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Why are degassing valves needed?

Some products, even after packaging, continue to generate gases due to physical, chemical, or biological processes inherent to their composition. When these gases are not controlled, they gradually accumulate inside the container.

This phenomenon causes visible deformations, stress on the seals, risk of breakage during transport and storage, and a direct acceleration of oxidation processes. In practical terms, this translates into a loss of product quality, a reduced shelf life, and a decline in brand perception among the end consumer.

The degassing valve solves this problem through a unidirectional gas release system. When the internal pressure exceeds a defined threshold, the internal membrane opens, allowing the accumulated gas to escape. Once the pressure equalizes, the valve closes automatically, preventing any external air from entering.

Applications of degassing valves

Coffee degassing valves

Coffee naturally releases carbon dioxide after roasting. Without a degassing system, the packaging acts like a pressurized container, compromising seals, stability, and aroma preservation. The valve allows CO2 to be released without exposing the product to oxygen, making it a technical standard for specialty and premium coffees.

Degassing valves for pet food

In premium pet food, gases are generated after packaging, causing visible deformation in containers without a valve. A degassing valve ensures container stability, improved presentation, and compliance with logistical and regulatory requirements, especially for larger formats.

Other industrial applications

Fertilizers, specific chemicals, and hygroscopic materials require internal pressure control. In these cases, the correct selection of the valve and application system is key to the safety and stability of the container.

HOW DOES A DEGASSING VALVE WORK?

The system operates using a one-way mechanism. The valve incorporates an internal membrane that responds to the pressure generated inside the container.

When the internal pressure increases due to the release of gases from the product, the membrane opens, allowing the gas to escape. When the pressure equalizes, the valve closes automatically, preventing the entry of oxygen or moisture from the outside.

This mechanism maintains the stability of the container, protects the product, and helps preserve critical attributes such as aroma, freshness, and sensory quality.

TYPES OF DEGASSING VALVES

Standard front valve

The most commonly used solution for coffee and dry foods.
It is installed on the front of the pouch, combining gas release with a good shelf presence.

Compatibility: doypack, stand-up pouch, laminated pouch.

Integrated degassing valve

Designed for premium brands where packaging aesthetics are key. Maintains unidirectional functionality with a more discreet integration.

Compatibility: Premium pouches, barrier materials.

Degassing valve for large containers

Designed for larger volume formats, such as pet food. Offers greater gas release capacity and mechanical resistance for logistics applications.

Compatibility: Large bags, pet food, industrial.

Degassing valve with filter

Option designed to control fine particles and maintain gas flow without compromising the container’s barrier properties.

Compatibility: ground coffee, products with fine dust.

Customizable degassing valve

Available in various colors for brand consistency and shelf differentiation, while maintaining technical performance.

Compatibility: coffee and premium foods.

Valve for industrial applications

For products that release gases or vapors under demanding conditions. Selection based on product, format, and logistics chain.

Compatibility: fertilizers, specific chemicals, hygroscopic substances.

Degassing valve applicator equipment

To ensure consistency, speed, and positioning accuracy,
valve installation is performed using applicator equipment. Italzip offers semi-automatic and automatic solutions, depending on production volume, container size, and line requirements.

Specification	Detail
Application range	Bags of coffee
Efficiency	25–40 unidades/min
Bag length	120–400 mm
Bag width	70–240 mm
Valve location depth	70–180 mm
Size / Weight	180 × 135 × 190 cm / 900 kg
Voltage / Power	220 V CA 50 Hz / 3 kW

Specification	Detail
Application range	Bags of coffee
Efficiency	15–20 unidades/min
Bag length	120–400 mm
Bag width	70–240 mm
Valve location depth	70–180 mm
Size / Weight	180 × 80 × 190 cm / 700 kg
Voltage / Power	220 V CA 50 Hz / 2 kW

Specification	Detail
Application range	Bags of coffee
Efficiency	10–15 unidades/min
Bag length	120–600 mm
Bag width	70–400 mm
Valve location depth	70–220 mm
Size / Weight	60 × 70 × 70 cm / 150 kg
Voltage / Power	220 V CA 50 Hz / 1 kW

Specification	Detail
Application range	Bags of feed, fertilizer and chemicals
Efficiency	6–10 unidades/min
Bag length	400–1000 mm
Bag width	300–500 mm
Valve location depth	80–900 mm
Size / Weight	155 × 100 × 120 cm / 700 kg
Voltage / Power	220 V CA 50 Hz / 1 kW

Compatibility with flexible packaging and a comprehensive solution

Italzip degassing valves are compatible with doypacks, stand-up pouches, flat-bottom pouches, and multilayer packaging used in food and industrial applications. To ensure optimal performance, the system must be defined as a whole: valve + packaging material + application position + application method.

Italzip can assist with technical selection and commissioning to ensure packaging stability, consistent seals, and scalable operation based on your production volumes.

Frequently asked questions about degassing valves

What is the purpose of a degassing valve in coffee?

It allows the release of CO2 that coffee naturally expels after roasting without allowing oxygen to enter. This prevents swollen packaging, protects the seal, and helps preserve aroma and freshness.

Does a degassing valve allow air to pass into the room?

No. It’s a one-way system: it releases gases outwards when there is overpressure and closes automatically, preventing the entry of outside air.

Can a degassing valve be used in pet food?

Yes. In premium pet food, it helps stabilize the packaging, prevent deformation, and maintain consistent presentation during logistics, especially in large formats.

How do I choose the valve type and location?

It depends on the product, gas volume, container size, material structure, and brand aesthetics. Italzip can evaluate the correct option and its integration with the application method.

Let's talk about the right solution for your product

Each product presents specific challenges related to gas release, packaging format, and logistical conditions. Our team can help you define the most suitable degassing valve and application system for your operation and business objectives.

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