Variable air volume valve
The variable 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, hospital ventilation projects and industrial ventilation systems. It is mainly used to adjust the air volume of the pipeline according to actual needs to achieve system air volume balance, energy-saving operation and stable control.

The product can adjust the valve opening through manual, electric or automatic control, thereby changing the air flow in the pipeline. According to the needs of different projects, the variable air volume valve can be equipped with electric actuators, air volume sensors, control modules, signal feedback and remote control interfaces. It is suitable for ventilation and air conditioning engineering projects that require air volume adjustment accuracy, system response speed and automatic control.

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Technical parameters of square variable air volume valve:


Inner diameter width B

Inner diameter height A

Flange width G

120

120

40

160

120

40

200

120

40

200

160

40

200

200

40

250

120

40

250

160

40

250

200

40

320

120

40

320

160

40

320

200

40

320

250

40

400

200

40

400

250

40


Technical parameters of circular variable air volume valve:

Pipe diameter

Valve body length

Air volume (m³/h)

φ100mm

400mm

28-283

φ125mm

44-442

φ150mm

64-636

φ160mm

72-724

φ200mm

113-1131

φ250mm

177-1767

φ300mm

254-2545

φ315mm

281-2850

φ350mm

346-3464

φ400mm

452-4524

φ450mm

573-5725

φ500mm

707-7068



Why choose variable air volume valve

In modern ventilation and air conditioning systems, the demand for supply air volume, exhaust air volume and fresh air volume in different areas will change with the number of personnel, usage status, temperature and humidity, air quality or process requirements. If the system maintains a fixed air volume operation for a long time, it will easily cause waste of energy consumption, local air volume imbalance, or reduced indoor comfort.

The variable air volume valve can flexibly adjust the air volume according to actual needs, helping the system achieve on-demand air supply, on-demand air exhaust and precise control. It not only helps to improve the operating efficiency of ventilation systems, but also improves indoor air quality, reduces energy consumption, and meets the different air control requirements of laboratories, hospitals, clean rooms and commercial buildings.


Main features

Flexible air volume adjustment

By adjusting the opening of the valve, the air flow in the pipe can be controlled, and it is suitable for air volume adjustment and system balancing of supply, return, exhaust and fresh air systems.

Support automatic control

Electric actuators, control modules or air volume sensors can be configured according to project requirements to achieve automatic adjustment, remote control and intelligent system linkage.

Suitable for variable air volume systems

Suitable for VAV systems, laboratory exhaust control systems, clean room air supply and exhaust control systems and hospital ventilation systems to meet the dynamic air volume needs of different areas.

Various control methods

You can choose manual control, electric switch control, electric proportional adjustment, 0-10V control, 4-20mA control or other control methods to facilitate access to the building automation system.

The system balance effect is good

By adjusting the air volume of each branch, the problem of uneven air volume distribution can be reduced and the overall operation stability of the ventilation and air conditioning system can be improved.

Stable structure and reliable operation

The valve body has a solid structure and the valve plate opens and closes smoothly. It can adapt to long-term high-frequency operation requirements and is suitable for use in commercial buildings, hospitals, laboratories and industrial places.

Flexible material selection

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

Easy installation and maintenance

The structure is reasonably designed and can be installed in round or square air duct systems, making it easy to install, debug and later maintain on site.


Typical applications

Variable air volume valves are widely used in the following scenarios:

  • Office building ventilation and air conditioning systems

  • Commercial building air conditioning systems

  • Hotels and shopping malls

  • Hospital ventilation systems

  • Operating rooms and clean areas

  • Laboratory exhaust systems

  • Fume hood exhaust system

  • Clean room air supply and exhaust system

  • Pharmaceutical workshop

  • Electronic factory

  • Industrial workshop ventilation system

  • HVAC new construction, renovation and maintenance projects

Mainly used for:

  • Air conditioning supply air volume adjustment

  • Fresh air volume adjustment

  • Exhaust air volume control

  • Return air volume control

  • Laboratory safety exhaust management

  • Fume hood air volume control

  • Clean room pressure difference and air volume Control

  • Ventilation control in different areas of the hospital

  • Building energy-saving ventilation system

  • Multi-branch ventilation system air volume balance


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

  • Round or square structure customization

  • Set air volume range customization

  • Customized air volume control accuracy requirements

  • Select galvanized steel plate, stainless steel, aluminum alloy, PP or other materials

  • Manual, electric switch or electric adjustment control method

  • Electric actuator brand and specification selection

  • 0-10V, 4-20mA or other control signal interface

  • Opening feedback, air volume feedback or status feedback function

  • Air volume sensor and control module configuration

  • Flange connection, plug connection or other connection methods

  • Sealing structure, anti-corrosion structure or insulation structure customization

  • OEM / ODM production

  • Processing according to drawings or samples

Whether it is commercial building HVAC systems, hospital clean projects, laboratory exhaust projects, or industrial ventilation systems, 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 air volume adjustment, system balance and automatic control of HVAC systems, laboratory exhaust systems, hospital clean engineering and industrial ventilation systems, and can provide customers with practical and reliable variable air volume valve products.

Support engineering project customization

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

Flexible adjustment and high system matching

The product can meet the needs of manual adjustment, electric adjustment, proportional control and building automatic control linkage, and is suitable for ventilation and air conditioning systems of different complexity.

Rich material choices and wide application range

Appropriate materials can be selected according to general ventilation, clean environment, hospital engineering or corrosive exhaust systems to meet the requirements of different projects.

Suitable for foreign trade export

The product can be adjusted in packaging, size, material, connection method, actuator configuration and control signal according to the needs of foreign customers, and supports batch orders and OEM cooperation.

Strict quality control

Quality control is carried out from material selection, valve body processing, valve plate assembly, actuator installation, action testing, signal inspection to factory inspection to ensure stable product structure, smooth adjustment and reliable control.

Quickly respond to customer needs

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


Get a Quote

If you are looking for a variable air volume valve or HVAC 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 engineering Operating pressure range

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

  • Material requirements, such as galvanized steel plate, stainless steel, aluminum alloy or PP

  • Control method, such as manual, electric switch type or electric adjustment type

  • Whether actuator, air volume sensor, signal feedback or remote control is required

  • Connection method, such as flange connection or plug connection

  • Purchase quantity

  • Whether customized drawings or OEM services are required

  • Destination port or delivery location

We will provide professional suggestions, product solutions and quotations based on your needs.

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