Bifurcated Fan

We do not offer single-phase motors for our plastic fans. This is for the following reasons:

• Single-phase motors must operate above 75% of full load current to limit the excess power dissipating as heat. This heat causes the motor to burn out.
• Because the design and actual duties achieved following installation are seldom the same, we use our experience in air movement to mitigate any potential problems by sizing fan motors at the top end of their capability. We base our calculations on the fan duty specified by the client.
• Short intermittent use of a single-phase motor may be acceptable as the heat rise within the motor would be limited, and the unit would cool down between periods of use. However, we do not recommend or supply this type of motor for any fan applications.

Should a single-phase motor still be requested, we would require this to be free-issued for us to fit. We would be unable to provide a warranty on the fan unit due to the potential issues that may be experienced.

APMG will always recommend three-phase motors controlled using a single-phase input/three-phase output inverter.

A bifurcated fan, also known as a bifurcated axial fan, is a specialised type of fan designed for situations where it is necessary to move air or gas, especially in challenging or harsh environments. Here are the key features and functions that distinguish bifurcated fans;

分离发动机和气流路径
The term ‘bifurcated’ means divided into two branches or parts. In a bifurcated fan, the motor is completely isolated from the airflow. This design is essentially a ‘split’ between the impeller (the part of the fan that moves the air) and the motor that drives it.

Application in Hostile Environments
Because the motor is isolated from the air stream, bifurcated fans are ideal for moving air that may be hot, humid, or laden with corrosive fumes, dust, or other contaminants. The design ensures that the motor is protected from these harsh conditions.

High-Temperature Tolerance
Bifurcated fans are often used when high-temperature air needs to be moved, such as in industrial ovens, kilns, or exhaust systems for engines or turbines. Because the motor is isolated, it stays cooler and is less likely to be damaged by the hot air stream.

Variable Installation Angles
Bifurcated fans are designed to be versatile and can often be installed at various angles. This is important for applications where space is limited or a specific airflow direction, is required.

Material Options for Corrosive Environments
The casings and impellers of bifurcated fans are often made from materials such as stainless steel, polypropylene, or other plastics that are resistant to corrosion. This makes them suitable for use in chemical plants or other environments with corrosive gases.

Efficient for High Volume, Low Resistance Systems
Bifurcated fans are typically axial fans, efficiently moving large volumes of air against low resistance. They are ideal for situations where much air needs to be moved, but the system doesn’t require high pressure.

Safety and Reliability
Since the motor is isolated from potentially hazardous fumes or high temperatures, bifurcated fans are very safe and reliable options for industrial ventilation and exhaust applications.

Our B-Series bifurcated fans are ideal for demanding environments where air or gases may be hot, humid, corrosive, or dust and other contaminants. Common applications include chemical processing plants, industrial ovens and kilns, engine or turbine exhaust systems, laboratory fume hoods, and wastewater treatment facilities. The isolated motor design ensures long-lasting performance under extreme conditions.

Yes. At APMG Plastics, we understand that every application is unique. We offer a range of customisable options, including various impeller materials, motor specifications, mounting brackets, flexible connections, and anti-vibration mountings. Our team is here to work with you to design and configure a bifurcated fan that meets your needs and operating conditions.

Selecting the right fan size and specifications depends on various factors, including the air volume you need to move, the system resistance, the temperature and nature of the gases, and the available installation space. Our B-Series bifurcated fans are available in 8 standard sizes, from B250 through to B760, capable of handling volumes from 0.1 m³/sec to 6 m³/sec at pressures up to 490 Pa. Our expert team can assist you in making the right selection based on your specific application requirements. Contact us for a consultation, and we will guide you.