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BI-Series Plastic Fan

Backward Inclined Fans

The APMG Plastics BI-Series Backward Inclined Centrifugal Fan is recommended for light or medium-duty applications.

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Our friendly, professional team is waiting to help you with all your plastic fan enquiries.

Backwards Inclined Plastic Fan

The BI-Series Backward Inclined Centrifugal Fan is a hard-wearing industrial fan ideally suited to light or medium-duty applications.

BI-Series Plastic Fans

Our extract fans are designed and manufactured at our Manchester-based factory, where our highly skilled plastic fabricators deliver high-quality products at competitive prices.

Bifurcated Fan Configuratiton

The angle and number of blades in this plastic fan will depend on the duty point of the fan. Our expert team of sales engineers can advise which impeller configuration will most efficiently achieve the required volume and pressure for your application.

Bifurcated Fan
Bifurcated Fan Inside


We offer a range of 11 standard sizes of high-efficiency backward-inclined centrifugal extract fans.

  • Fan Casing – Fan casing manufactured from polypropylene or PVC and glass fibre reinforcement for higher pressure applications.
  • Impeller – Backward inclined centrifugal fabricated from polypropylene.
  • Pedestal – Standard rolled steel sections with hot dipped galvanised finish
  • Motors – IEC standard motors to IP55 which can be upgraded to suit the specification.
  • Bearings – SKF or equal, double row self aligning ball
  • Drives – Fenner or equal
  • Fixings – Stainless steel throughout.
  • Anti-vibration Mountings – AVA or equal, rubber in aluminium with option of spring mounts.
  • Drive Arrangement – Standard V belt or direct driven.

Our BI-Series backward inclined centrifugal fan range has proved to be a popular international fume extraction solution. Find out more about how we can apply a GRP (glass fibre reinforced plastic) coating to our fans for even greater resilience.

The materials of construction for each fan are chosen according to the fan’s application and the requirement for resistance to chemical attack. We’ll ask you to provide full details at tender stage.


Please see below the most common question regarding our plastic fans. Contact our friendly team if you can’t find the answer you need.

Are single phase motors suitable for plastic fan operation?

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.

Let’s Talk

Need a little guidance? A sales engineer is always on hand to discuss your requirements and provide a full technical specification and quotation – just get in touch and tell us your application.