Airbag type constant air volume valve
The air bag type constant air volume valve is an air volume control device used in ventilation and air conditioning systems, laboratory exhaust systems, clean room air supply and exhaust systems and hospital ventilation projects. It is mainly used to maintain stable air volume within a certain range of pressure changes and improve the balance and reliability of ventilation system operations.

The product adopts an air bag type adjustment structure, which can automatically adjust the effective ventilation cross-section according to the pressure changes in the pipeline to keep the air volume within the set range. Compared with ordinary manual control valves, air bag-type constant air volume valves do not require frequent manual adjustments and are suitable for places with higher requirements for air volume stability, system balance and operation safety. The size, air volume range, material, connection method, control method and supporting accessories of the product can be customized according to customer needs to meet the needs of different HVAC and laboratory ventilation projects.

Why choose air bag type constant air volume valve

In ventilation and air conditioning systems, air volume stability directly affects indoor air quality, system balance, energy consumption control and user comfort. Ordinary regulating valves are prone to air volume fluctuations when pipeline pressure changes, and require repeated debugging and maintenance. Especially in scenarios with high air volume requirements such as laboratories, hospitals, and clean rooms, it is easy to affect system operation.

The airbag-type constant air volume valve can automatically adjust the air volume when the pressure changes, helping the system maintain stable operation and reducing the workload of manual adjustment. It has a practical structure, flexible response and wide application range. It is a commonly used air volume control product in laboratory ventilation, clean room air supply and exhaust, hospital ventilation and commercial building HVAC systems.


Main features

Automatically maintain stable air volume

The airbag structure can automatically adjust the ventilation cross-section according to changes in pipe pressure to keep the actual air volume within the set range, helping to maintain system balance.

Air bag type adjustment structure

The air volume is adjusted through the expansion or contraction of the air bag. The action is flexible and suitable for ventilation systems that require stability in air volume control.

No need for frequent manual adjustments

After installation and debugging, the valve can work automatically within a certain pressure range, reducing the workload of manual adjustments and maintenance in the future.

Suitable for air supply and exhaust systems

Can be used in air conditioning supply, fresh air systems, laboratory exhaust, clean room exhaust and industrial ventilation systems to meet the air volume control needs of different scenarios.

The system balance effect is good

It can help multiple branches maintain stable air volume, reduce uneven air volume caused by pressure changes, and improve the overall operating effect of the ventilation and air conditioning system.

Compact structure and easy installation

The valve body has a reasonable structure and can be installed in the air duct system. It is suitable for new projects, renovation projects and supporting equipment.

Flexible material selection

It can be made of galvanized steel plate, stainless steel, PP or other materials according to the use environment to meet the needs of general ventilation, clean environment or corrosive exhaust system.

Support non-standard customization

Can be customized according to customer's air duct size, set air volume, system pressure, installation space and project drawings to meet the requirements of different engineering projects.


Typical applications

Air bag type constant air volume valves are widely used in the following scenarios:

  • Laboratory ventilation system

  • Chemistry laboratory exhaust system

  • Fume hood exhaust system

  • Hospital ventilation and air conditioning system

  • Operating rooms and clean areas

  • Clean room ventilation system

  • Pharmaceutical workshop

  • Biology laboratory

  • Inspection and testing center

  • Electronic factory

  • Commercial building air conditioning system

  • HVAC new construction, renovation and maintenance projects

Mainly used for:

  • Duct air volume stability control

  • Laboratory exhaust air volume control

  • Fume hood branch air volume control

  • Clean room air supply and exhaust control

  • Ventilation balance in different areas of the hospital

  • Fresh air system air volume control

  • Air conditioning System branch air volume balance

  • Industrial exhaust system air volume control

  • Multi-branch ventilation system balance

  • Ventilation scenarios that require stable air volume< /p>


Customization capabilities

We support non-standard customization according to customer project needs to meet the actual use requirements of different countries, different engineering systems and different installation environments.

Customizable content includes:

  • Valve size customization

  • Circular or square structure customization

  • Set air volume range customization

  • Working pressure range customization

  • Galvanized steel plate, stainless steel, PP or other material selection

  • Air supply type or exhaust type Structure

  • Flange connection, plug connection or other connection methods

  • Air bag material and structural configuration

  • Manual setting or special Special control methods

  • Inspection openings, sealing strips or supporting accessories configuration

  • Surface spraying, wire drawing or anti-corrosion treatment

  • OEM / ODM production

  • Processing according to drawings or samples

Whether it is a laboratory ventilation project, a hospital clean project, or a commercial building HVAC system, we can provide flexible product solutions according to customer needs.


Our advantages

Focus on the manufacturing of ventilation and air conditioning control products

We are familiar with the requirements for stable air volume, system balance and operational reliability in ventilation systems of laboratories, hospitals, clean rooms and commercial buildings, and can provide customers with practical and reliable constant air volume valve products.

Support engineering project customization

Can be customized according to customer drawings, air duct size, air volume parameters, pressure range and installation location, suitable for new projects, renovation projects and equipment procurement.

Stable air volume control

The air bag adjustment structure can automatically adjust when the pressure changes, helping to maintain stable branch air volume and improve system operation effects.

Flexible material selection and wide application range

Appropriate materials can be selected according to general ventilation, clean environment or corrosive exhaust system to meet the needs of different projects.

Suitable for foreign trade exports

The packaging, size, material, connection method and parameter configuration of the products can be adjusted according to the needs of foreign customers, and batch orders and OEM cooperation are supported.

Strict quality control

Quality control is carried out from material selection, valve body processing, airbag assembly, sealing inspection, action test to factory inspection to ensure stable product structure, reliable adjustment and easy use.

Quickly respond to customer needs

We can quickly provide product solutions and quotations based on the dimensions, pictures, drawings, air volume parameters, system pressure or project requirements provided by customers.


Get a quote

If you are looking for a bladder-type constant air volume valve or HVAC constant air volume control valve, please contact us to get a quote.

In order to provide you with an accurate solution faster, please provide the following information:

  • Required valve size

  • Pipe shape, such as round or square

  • Set air volume range

  • System working pressure range

  • Usage scenarios, such as laboratory exhaust, clean room air supply, hospital ventilation or commercial air conditioning systems

  • Material requirements, such as galvanized steel plates, stainless steel Stainless steel or PP

  • Connection method, such as flange connection or plug connection

  • Whether there are anti-corrosion, sealing or cleanliness requirements

  • Purchase quantity

  • Do you need customized drawings or OEM services

  • Destination port or delivery location

We will provide professional suggestions, product solutions and quotations according to your needs.

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