When I work on an air-supported membrane project, I always look at the air supply system as part of the structure, not as a separate piece of equipment. A stadium air-supported membrane may look simple from the outside, but keeping a large membrane stable requires a steady and well-controlled air supply. This is where a reliable fan system becomes important.

Our Dual Air Supply Fan for Stadium Air-Supported Membrane is designed for large air-supported stadiums, sports domes, training facilities, event venues, and other membrane structures that require continuous internal air pressure. The dual air supply arrangement gives the system more flexibility than a single-fan setup. Depending on the project, the two fans can be arranged to support the required airflow, provide operational flexibility, or work together as part of a larger air supply system.

At Zhejiang Shangyang Industrial Fan Co., Ltd., we manufacture Centrifugal Fans and other industrial ventilation equipment. Our sales company is located in Shanghai, China, while our manufacturing factory is located at No. 6-8, Bifa Road, Xinbi Subdistrict, Jinyun County, Lishui City, Zhejiang Province. Our fan technology design, manufacturing, and sales teams have around 20 years of experience.

Over the years, we have developed and improved industrial fans for coating, environmental protection, dust collection, boilers, kilns, thermal energy, printing, chemical processing, food processing, air-supported membranes, and other applications. This background helps us understand a basic point: there is no useful fan selection without understanding the actual working conditions.

For a stadium air-supported membrane, the fan needs to match the membrane system, required internal pressure, air leakage, door operation, duct resistance, installation conditions, and operating schedule. The final fan configuration should therefore be confirmed from the complete project requirements rather than from the membrane size alone.

1. What Is a Dual Air Supply Fan for an Air-Supported Stadium?

A Dual Air Supply Fan for Stadium Air-Supported Membrane is an air supply system using two fan units to provide airflow to a large membrane structure. The purpose is straightforward: supply enough air to maintain the internal pressure required by the air-supported membrane.

Unlike a conventional stadium with a rigid roof, an air-supported stadium uses the pressure difference between the inside and outside of the structure to help support the membrane. The membrane is sealed as much as practical, but it is not perfectly airtight. Air naturally escapes through small leakage paths, doors, entrances, equipment openings, and other areas.

The air supply system continuously replaces this lost air.

For a small structure, a relatively simple air supply arrangement may be enough. For a large stadium or sports dome, however, the airflow requirement can be much more demanding. The system may also need operational flexibility because the stadium can have different conditions during normal operation, events, maintenance, and access periods.

That is one reason a dual air supply arrangement can be useful.

We do not treat the two fans simply as “two identical fans.” Their actual arrangement depends on the project. They may operate together, operate under different conditions, or be configured as part of a larger control and backup strategy. The correct arrangement should be determined by the membrane system designer and the fan's operating requirements.

Why Use Two Fans?

The answer depends on the project.

In some systems, two fans are used to provide the required total airflow. In other systems, the two units give the operator more flexibility when demand changes. A dual-fan arrangement can also make maintenance planning easier when the system is designed so that one unit can continue supporting the structure under defined operating conditions.

However, I always recommend checking the actual system design before assuming that one fan can automatically serve as a complete backup for the other. Backup capacity, control logic, pressure requirements, and the required operating condition must all be confirmed.

Source: Zhejiang Shangyang Industrial Fan Co., Ltd. application information supplied for this product. Actual configuration and operating mode should be confirmed according to the air-supported membrane system design.

2. How Does the Stadium Air-Supported Membrane Fan Work?

The working principle is quite easy to understand.

The centrifugal fan draws air from outside the structure. When the impeller rotates, it transfers energy to the air. The air then moves through the fan casing and into the connected air supply system. From there, the air enters the stadium or sports dome.

As more air enters the membrane structure, the internal pressure rises to the required operating level. Once the target condition is reached, the air supply system continues to compensate for normal leakage.

In a dual air supply system, the two fans are arranged according to the project's airflow and control requirements.

1. Outside air enters the fan inlet.

2. The centrifugal impeller rotates and transfers energy to the air.

3. The fan casing directs the air toward the outlet.

4. The air passes through the connected duct or air supply equipment.

5. Air enters the air-supported stadium or membrane structure.

6. Internal pressure supports the membrane.

7. The fan system continues supplying air to compensate for normal air leakage.

This process may run continuously. For that reason, I pay close attention to the fan's operating schedule when discussing a project with a customer. A fan that works well for short periods may not necessarily be the right choice for a system that needs continuous operation throughout the year.

Airflow Is Not the Same as Pressure

This is one of the most important things for a buyer to understand.

Airflow tells us how much air the fan can move. Pressure tells us how much resistance the fan can overcome while moving that air.

A stadium membrane may have a large internal volume, but the fan selection cannot be based only on volume. The connected ducts, bends, filters, dampers, outlets, and other components can create resistance. Door openings can also increase air loss.

So when we select a stadium air-supported membrane fan, we look at the complete air path.

3. Main Features of Our Dual Air Supply Fan

When customers ask us what makes a good air-supported membrane fan, I normally avoid complicated explanations. The basic requirements are simple: stable airflow, suitable pressure, reliable operation, reasonable noise, and a configuration that fits the project.

Stable Air Supply

An air-supported stadium needs continuous air support. Our fan design focuses on providing stable airflow according to the confirmed project requirements.

The final airflow and pressure are not fixed by the product name. They depend on the specific fan configuration selected for the project.

Dual Fan Configuration

The use of two fan units gives the system additional configuration possibilities. Depending on the design, the fans can be operated together or managed under different operating conditions.

This can be useful when the air-supported structure has changing operating demands.

Suitable for Continuous Operation

Many air-supported sports facilities operate for long hours. The fan system therefore needs to be selected according to the expected duty cycle.

We consider the operating schedule when discussing the motor, bearing arrangement, transmission structure, and other components.

Flexible Airflow and Pressure Configuration

Different stadiums have different requirements. A training dome, temporary sports facility, large event venue, and permanent membrane structure may have completely different operating conditions.

We can discuss the required fan configuration according to airflow, pressure, installation dimensions, motor requirements, and other project information.

Practical Maintenance

A fan may run reliably, but maintenance is still necessary. We prefer practical equipment arrangements that allow customers to inspect important components and perform routine maintenance without unnecessary difficulty.

Low-Noise Options

Noise is often more important in sports facilities than in ordinary factories. Spectators, athletes, staff, and nearby buildings may all be affected by fan noise.

Fan speed, airflow, impeller condition, vibration, motor operation, duct design, and installation can all influence the final sound level. If the project has strict noise requirements, we recommend discussing them before production.

4. Key Technical Factors for Stadium Air-Supported Membrane Fan Selection

I always suggest that customers prepare basic system information before asking for a quotation. This saves time and reduces the risk of selecting a fan that looks suitable on paper but does not match the actual installation.

Membrane Dimensions

The length, width, height, and approximate volume of the stadium or sports dome provide the first reference point.

Still, these figures are not enough to determine the final fan size. We also need to know how the structure is used.

Required Internal Pressure

The required operating pressure should come from the membrane system design. This is a key input for fan selection.

We should not guess this value simply from the building size.

Air Leakage

Every air-supported structure has some level of air leakage. The system needs enough airflow to compensate for it.

Doors are especially important. A large entrance used frequently by vehicles or people can cause a significant temporary change in air loss.

Duct Resistance

The fan does not send air directly into an empty space. In many systems, air passes through ducts, bends, dampers, filters, silencers, or distribution equipment.

All of these components can create pressure loss.

Operating Schedule

We need to know whether the fan will operate continuously, periodically, or under changing loads. This information affects the equipment configuration and control strategy.

Installation Conditions

The available installation area, fan orientation, inlet and outlet position, access for maintenance, and environmental conditions should be confirmed before manufacturing.

Power Supply

Voltage, frequency, phase, motor power, and other electrical requirements should be confirmed before production.

Source: Zhejiang Shangyang Industrial Fan Co., Ltd. product selection guidance based on the supplied product information and industrial fan application experience.

5. Applications of the Dual Air Supply Fan

The most obvious application is the air-supported stadium, but the same type of air supply equipment can be considered for many large membrane structures.

Air-Supported Stadiums

This is the main target application. Sports stadiums and large sports domes require stable internal air pressure to keep the membrane in its designed shape.

The dual fan system can be configured according to the required airflow and pressure and the operating strategy of the facility.

Sports Training Centers

Training centers may use air-supported structures for football, tennis, basketball, swimming, or other sports. These facilities can operate for many hours each day, so stable air supply is important.

Indoor Sports Domes

Large sports domes are another common application. The fan provides the air required to support the membrane structure.

Event and Exhibition Venues

Temporary or semi-permanent air-supported structures can be used for exhibitions, events, entertainment, and large gatherings.

In these applications, noise and installation flexibility may become especially important.

Large Storage Structures

Some large storage facilities use membrane structures to create enclosed space without constructing a conventional rigid building.

Industrial Air-Supported Structures

Industrial facilities may use membrane structures for storage, temporary production areas, covered workspaces, or other applications.

Source: Zhejiang Shangyang Industrial Fan Co., Ltd. stated application fields and product application experience. Actual suitability depends on the membrane system and project conditions.

6. How We Manufacture the Stadium Air Supply Fan

From my experience, good fan manufacturing starts before the workshop floor. It starts with understanding the application.

For a standard fan, the production route is relatively clear. For a specialized product such as a Dual Air Supply Centrifugal Fan for an air-supported stadium, we first need to confirm what the customer actually needs.

Technical Confirmation

We review airflow, pressure, motor requirements, fan arrangement, installation dimensions, inlet and outlet direction, operating hours, environmental conditions, and other available project information.

If the customer can provide drawings, fan data sheets, system diagrams, installation photographs, or existing equipment information, our technical team can use these materials during the discussion.

Component and Material Preparation

After the configuration is confirmed, we prepare the required materials and components.

Different applications may require different material choices. A normal air supply application does not necessarily need the same material as a high-temperature, corrosive, or dust-laden gas application.

Impeller Manufacturing

The impeller is one of the key rotating parts of a centrifugal fan.

During manufacturing, we pay attention to blade positioning, welding condition, dimensions, shaft connection, and balance. A properly balanced rotating assembly helps reduce unnecessary vibration during operation.

Casing Manufacturing

The casing guides airflow from the impeller toward the outlet. Its dimensions and outlet arrangement must match the confirmed design.

Fan Assembly

The impeller, shaft, bearings, motor, casing, base, transmission components where applicable, and other parts are assembled according to the agreed configuration.

Alignment and assembly condition are checked during the manufacturing process.

Inspection Before Delivery

Before delivery, we inspect the fan according to the agreed technical requirements. Depending on the order, inspection may include appearance, dimensions, rotation direction, assembly condition, operating performance, and accessories.

Our company also possesses multiple national test reports for specialized products and has obtained applicable certifications, including national explosion-proof certification and energy efficiency certification for relevant products.

7. Production, Delivery, Payment, Transportation and Packaging

For an overseas industrial fan order, technical performance is only one part of the project. The customer also needs a clear understanding of lead time, delivery scope, payment, transportation, and packaging.

Production Lead Time

The production cycle depends on the fan model, airflow and pressure requirements, motor configuration, materials, order quantity, customization requirements, and current production schedule.

Standard configurations generally have a simpler production process. Customized dual air supply systems may require additional time for technical confirmation, component preparation, manufacturing, assembly, inspection, and packaging.

For this reason, we normally confirm the technical requirements before giving a final production schedule.

Delivery Standard

Before shipment, we inspect the fan according to the agreed requirements. The standard delivery scope depends on the confirmed quotation and technical agreement.

Depending on the order, the supplied equipment may include the complete fan unit and agreed supporting components. The exact scope should always be confirmed before production.

Payment Terms

T/T is commonly used for industrial equipment orders. The deposit, balance, and payment schedule are determined according to the commercial contract.

Transportation

For domestic projects, truck transportation can be arranged. For overseas orders, we can discuss sea freight, rail transportation, truck transportation, or suitable combined logistics according to the destination and equipment dimensions.

Packaging

Industrial fans need proper protection during handling and transportation. Depending on the equipment size and shipping conditions, we may use protective film, wooden cases, steel frames, or reinforced packaging.

The motor, casing, shaft, impeller, electrical components, and exposed parts receive appropriate protection according to the packaging arrangement.

8. Why Work With Zhejiang Shangyang Industrial Fan Co., Ltd.?

When I talk with an industrial customer, I know that “we make fans” is not enough information. The customer usually wants to know whether we understand the application and whether we can handle the details after the order is placed.

Zhejiang Shangyang Industrial Fan Co., Ltd. is a national high-tech enterprise and a small- and medium-sized technology enterprise. Our sales company is based in Shanghai, while our factory is located in Jinyun County, Lishui City, Zhejiang Province.

Our fan technology design, manufacturing, and sales teams have around 20 years of experience. We started with practical industrial fan development and have continued to improve our products through manufacturing experience and technical development.

Our factory produces a broad range of industrial fans, including centrifugal fans, High-Temperature Fans, induced draft fans, axial fans, Low-Noise Centrifugal Fans, High-Pressure Fans, stainless steel centrifugal fans, hot air circulating fans, mixing fans, and explosion-proof centrifugal fans.

This broad product range matters because airflow problems are not always isolated. A customer may need a fan for an air-supported membrane today and an environmental exhaust fan or high-temperature fan for another project tomorrow. Our experience across several industrial applications helps us look at fan selection from a wider practical perspective.

Engineering Experience

Our technical team has worked with different airflow requirements and installation conditions. We understand that a fan needs to match the actual system.

Standard and Nonstandard Manufacturing

Not every stadium project has the same layout. Some have limited equipment space. Others require special outlet directions, mounting arrangements, motor configurations, or other modifications.

Our factory can manufacture both standard and nonstandard industrial fans, which gives us more flexibility when dealing with customized requirements.

Quality and Inspection

We follow a practical manufacturing approach. Before delivery, equipment is checked according to the agreed requirements.

We also have multiple national test reports for specialized products and have obtained applicable certifications for relevant products, including explosion-proof and energy efficiency certifications.

International Supply

Our industrial fan products are sold throughout China and exported overseas as supporting equipment. For international customers, we can discuss technical requirements, packaging, shipping arrangements, and delivery documents according to the order.

Customer Requirements Come First

Our working principle is simple: understand what the customer needs before deciding what equipment to manufacture.

For a stadium air-supported membrane system, that means looking at the membrane, airflow, pressure, duct system, operating conditions, and installation environment together.

9. Frequently Asked Questions About Dual Air Supply Fans for Stadium Membranes

What is a Dual Air Supply Fan for Stadium Air-Supported Membrane?

It is a two-fan air supply arrangement designed to provide continuous airflow for an air-supported stadium or large membrane structure. The exact operating arrangement depends on the system design.

Why use two fans instead of one?

A dual fan arrangement can provide greater flexibility for airflow and operation. Depending on the control strategy, the fans may work together or under different operating conditions. The actual configuration should be determined from the project's airflow and pressure requirements.

Can both fans run at the same time?

Yes, if the system is designed for simultaneous operation. However, the control method and operating conditions must be confirmed according to the membrane system design.

Can one fan be used as a backup?

Potentially, but this should not be assumed automatically. Whether one fan can provide sufficient emergency or reduced-load support depends on the required airflow, pressure, control system, and membrane operating condition.

Is this fan suitable for large sports stadiums?

It can be suitable when the fan's airflow and pressure are correctly matched to the stadium membrane system. We need the project requirements before confirming the specific fan configuration.

Does the fan need to run continuously?

Many air-supported membrane structures require continuous air supply to maintain internal pressure. The actual operating schedule depends on the membrane system and control design.

How do I calculate the required airflow?

The calculation should consider membrane volume, normal air leakage, door operation, required pressure, duct resistance, and other system conditions. For an existing project, previous fan data or system design information can also be useful.

What information should I send when requesting a quotation?

We recommend providing membrane dimensions, required internal pressure, airflow requirement if already available, door size and usage, duct layout, installation space, power supply, operating hours, noise requirements, and available drawings.

Can the fan be customized?

Yes. We manufacture standard and nonstandard industrial fans. Depending on the project, customization can be discussed for airflow, pressure, materials, motor configuration, outlet direction, mounting arrangement, and other requirements.

Can the fan be installed outdoors?

Outdoor installation can be considered, but the site environment must be confirmed. Weather exposure, temperature, rain protection, electrical protection, maintenance access, and other conditions may affect the final configuration.

How can stadium fan noise be controlled?

Noise can come from the motor, impeller, airflow, vibration, duct system, and installation structure. Depending on the project, appropriate fan selection, vibration isolation, acoustic treatment, or a soundproof arrangement may be considered.

What is the production lead time?

The lead time depends on the fan model, specifications, materials, quantity, motor, customization, and production schedule. Standard equipment generally requires less manufacturing time than highly customized equipment.

How is the fan packaged?

Packaging depends on the fan size and transportation method. Protective film, wooden cases, steel frames, or reinforced packaging may be used to protect the fan during loading, unloading, and transportation.

What payment method do you accept?

T/T is commonly used for industrial fan orders. The exact deposit and balance arrangement is confirmed in the commercial contract.

10. What Should I Consider Before Ordering a Stadium Air Supply Fan?

My advice is to avoid starting with the question, “Which fan model should I buy?” Start with the system.

First, confirm the membrane size and required internal pressure. Then look at air leakage, door operation, duct resistance, operating hours, installation conditions, power supply, and noise requirements. Once these points are clear, the fan selection becomes much more straightforward.

A Dual Air Supply Fan for Stadium Air-Supported Membrane should be treated as part of the complete air-supported structure. The fan, membrane, duct system, control system, doors, and other components need to work together.

From our side, we focus on making the fan practical for the actual working condition. We review the airflow and pressure requirements, discuss the appropriate fan arrangement, confirm the motor and installation configuration, manufacture the equipment, inspect it before delivery, and arrange suitable packaging and transportation.

We do not believe that every air-supported stadium needs exactly the same fan. A sports training dome and a large event stadium can have very different operating conditions. Even two stadiums with similar dimensions may have different door usage, duct layouts, pressure requirements, or installation conditions.

That is why we prefer technical communication before production.

At Zhejiang Shangyang Industrial Fan Co., Ltd., we continue to develop centrifugal fans and specialized industrial ventilation equipment based on practical customer requirements. Our experience covers air-supported membrane systems as well as coating, boiler, kiln, dust collection, thermal energy, chemical, cement, food, printing, and other industries.

If you are planning an air-supported stadium, sports dome, membrane training center, exhibition venue, or another large air-supported structure, you can send us the available project information.

We can review the required airflow, pressure, dual-fan arrangement, motor configuration, installation conditions, production requirements, delivery scope, packaging, and transportation method with you.

For me, the goal is quite simple: the fan should provide the air the membrane system needs, operate reliably under the intended conditions, and remain practical for the people who have to use and maintain it.

That is the thinking behind our Dual Air Supply Fan for Stadium Air-Supported Membrane.