PP variable air volume butterfly valve
PP variable air volume butterfly valve is an air volume regulating valve used in ventilation, exhaust and waste gas treatment systems. It is mainly suitable for laboratory exhaust, chemical waste gas, acid and alkali gas emissions, clean workshops, pharmaceutical workshops, environmental protection treatment equipment and industrial ventilation engineering projects.

The product is made of PP polypropylene material and has good acid and alkali resistance, corrosion resistance and chemical gas resistance. It is suitable for use in corrosive ventilation environments where ordinary metal valves are not suitable. By adjusting the opening of the butterfly plate, air volume control and system balance can be achieved. According to project needs, manual adjustment, electric actuator, signal feedback, remote control or automatic control system can be configured to meet the requirements of different ventilation systems for air volume adjustment, energy-saving operation and stable exhaust.

Product parameters:

Nominal diameter

Flange outer diameter

Inner diameter

Overall length

Socket depth

Wind speed-flow (CMH)






v≈1m/s

V≈6m/s

v≈10m/s

315

395

315

460

53

150

1579

2400

250

339

250

380

40

100

968

1600

200

280

200

397

30

65

500

1000

160

240

160

366

30

35

300

600

110

190

110

279

30

20

140

280


Product configuration:

Air volume and pressure control

Fume hood surface wind speed control

Integrated control configuration

Multifunctional control configuration

Integrated control configuration

Multi-function control configuration

Valve body + QAVC10 controller

Valve body + analog quantity fast execution
+QAVC12

Valve body + FHC10 controller

Valve body + analog fast actuator
+FHC12 controller




Valve body + analog fast actuator
+FHC100 controller (with automatic
door function)


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Nozzle pressure measurement structure

The Venturi nozzle type wind measurement structure is more accurate and has a larger adjustment ratio. Error within +/-4%, air volume adjustment 16:1



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High-precision flow sensor

Comes with high-precision flow sensor, real-time measurement


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Anti-corrosion and airtightness

Anti-corrosion and airtightness report certified by a third-party testing agency


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Application scenario

①‌ Used in fume hoods, the functions can be realized: face air velocity control

‌②‌ Used in exhaust and air supply ducts, the functions can be realized: control of room pressure/pipe pressure/pipe air volume



Why choose PP variable air volume butterfly valve

In laboratories, chemical industries, pharmaceuticals and environmentally friendly waste gas treatment systems, exhaust ducts are often exposed to acid and alkali gases, corrosive air or chemical waste gases. Ordinary metal air valves are prone to problems such as corrosion, sticking, sealing loss and increased maintenance costs during long-term use.

PP variable air volume butterfly valve is made of corrosion-resistant PP material and is suitable for long-term use in corrosive exhaust systems. The product has a simple structure and flexible adjustment. It can control the air volume according to the system demand, which helps to maintain the stable operation of the exhaust system, improve the pipe air volume balance effect, and reduce the difficulty of later maintenance.


Main features

PP corrosion-resistant material

The valve body and main components can be made of PP polypropylene material, which has good acid and alkali resistance, corrosion resistance and chemical gas resistance, and is suitable for use in laboratories, chemical industries and waste gas treatment systems.

Flexible air volume adjustment

By adjusting the opening angle of the butterfly plate, the air flow in the pipe can be controlled, which facilitates system debugging, air volume balance and operation management.

Suitable for variable air volume systems

Electric actuators or control signal interfaces can be configured according to project requirements to achieve remote adjustment or automatic control, and are suitable for use in variable air volume ventilation systems.

Simple structure and stable operation

The butterfly valve has a compact structure, flexible opening and closing movements, and low resistance. It is suitable for installation in ventilation ducts and exhaust gas treatment pipelines.

Acid and alkali resistant environment use

Suitable for exhaust scenarios containing acidic, alkaline or corrosive gases, which can reduce maintenance problems caused by corrosion of metal valves.

Optional manual or electric control

According to the use needs, you can choose manual adjustment of the handle, electric actuator control, switch control or proportional adjustment control to meet different system automation requirements.

Easy to install

Flange connection, socket connection or other installation structures can be designed according to the pipe connection method to facilitate on-site installation and maintenance.

Support non-standard customization

Can be customized according to customer’s air duct size, air volume requirements, control method and system parameters, suitable for different laboratories, chemical industry and environmental protection engineering projects.


Typical applications

PP variable air volume butterfly valve is widely used in the following scenarios:

  • Laboratory exhaust system

  • Chemical laboratory

  • Fume hood exhaust system

  • Pharmaceutical workshop

  • Chemical plant exhaust duct

  • Acid and alkali waste gas treatment system

  • Environmental waste Gas treatment equipment

  • Clean factory exhaust system

  • Electroplating workshop exhaust system

  • Semiconductor and electronic factory exhaust system

  • Hospital laboratories and testing centers

  • Industrial ventilation new construction, renovation and maintenance projects

Mainly used for:

  • Duct air volume adjustment

  • Exhaust system air volume balance

  • Corrosive gas emission control

  • Fume hood exhaust control

  • Air volume control at the inlet and outlet of exhaust gas treatment equipment

  • Variable air volume ventilation system supporting equipment

  • Laboratory safety Exhaust management

  • Chemical and pharmaceutical environment ventilation control

  • Acid mist, alkali mist and chemical gas exhaust system

  • Industrial exhaust duct switching and adjustment


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 corrosive environments.

Customizable content includes:

  • Valve size customization

  • PP material thickness and structure customization

  • Round or square pipe connection structure

  • Flange connection, socket connection or other connection methods

  • Manual adjustment or electric control method

  • Electric actuator brand and specification selection

  • Switching, regulating or proportional control configuration

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

  • Opening feedback or status feedback function

  • Sealing structure and valve plate structure customization

  • Corrosion-resistant fastener configuration

  • OEM / ODM production

  • Processing according to drawings or samples

Whether it is a single laboratory project or batch matching of chemical, pharmaceutical, and environmental engineering projects, we can provide flexible product solutions according to customer needs.


Our advantages

Focus on the manufacturing of ventilation and environmentally friendly supporting products

We are familiar with the requirements for corrosion resistance, air volume adjustment and operational stability of laboratory, chemical, pharmaceutical and environmentally friendly waste gas treatment systems, and can provide customers with practical and reliable PP air valve products.

Support engineering project customization

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

The material is corrosion-resistant and has strong applicability

Made of PP corrosion-resistant material, it is suitable for acid and alkali gases, chemical waste gases and humid exhaust environments, and can reduce maintenance problems caused by corrosion.

Flexible adjustment and high system matching

The product can meet the needs of manual adjustment, electric adjustment and automatic control, and is suitable for ventilation and exhaust gas treatment systems of different complexity.

Suitable for foreign trade export

The product can be adjusted in packaging, size, 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, processing and molding, valve body assembly, actuator installation, action testing to factory inspection to ensure stable product structure, smooth adjustment and reliable use.

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 PP variable air volume butterfly valve or corrosion-resistant ventilation butterfly 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

  • Material requirements and PP sheet thickness

  • Usage scenarios, such as laboratory exhaust, chemical waste gas or acid-base gas emissions

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

  • Whether required Actuator, signal feedback or remote control

  • Air volume range or system parameters

  • Connection method, such as flange connection or socket connection

  • Purchase quantity

  • Do you need customized drawings or OEM services?

  • Destination port or delivery location

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

Contact Us Now

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  • Complete product system widely used in cleanrooms, medical facilities, pharmaceuticals, HVAC, and industrial environments
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  • With more than 20 years of industry experience, we focus on the R&D and manufacturing of air filtration, air distribution, and cleanroom equipment, providing stable and reliable clean air system solutions for global customers while supporting OEM/ODM customization services.
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Address: No. 458 Jiangping Road, Jingjiang City, Jiangsu Province, China

Payment Terms: L/C, T/T, D/P

International Trade Terms: FOB, CFR, CIF, DAP, EXW

Average Lead Time: Peak season: one month; off season: within 15 working days

Nearest Port: Shanghai

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  • We provide a complete range of air filtration grades (G3-H14), air distribution products (air dampers and diffusers), and customized clean air system solutions for HVAC and cleanroom applications.

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  • Export Year: 2010
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