Backward Inclined BI-Series

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

Durafan BI-Series Backward Inclined Fan

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

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

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. We can advise and ensure you have the correct system for your project.

BI-Series Backward Inclined Fan Features

We offer a range of 11 standard sizes of high efficiency Durafan 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. Contact us to discuss your project at any point.


APMG Plastics also designs, manufactures and installs an extensive range of ductwork and vent fittings to complement our range of corrosion resistant extract fans. All pipework is manufactured to meet BESA DW/154 Specification for Plastics Ductwork, which is the premier specification for PVC and PP-S ducting.