Fiberglass (FRP) Fans

Fans and are constructed from a variety of materials to meet a variety of applications. When it comes to corrosive applications there are a few options available but a common solution is fiberglass.

Fiberglass, also referred to as FRP (Fiber-Reinforced Plastic) (what is FRP wiki) is a composite material made of a polymer matrix reinforced with glass fibers. The corrosion resistant properties of fiberglass are wide ranging and suitable for use across the pH scale. In addition to its corrosive properties, FRP provides a light weight and cost effective solution to its metal counterparts.

FRP fans and blowers are available in all of the most common fan types, including axial, centrifugal, radial, pressure blowers, etc. They can be used for general ventilation and incorporated into process ventilation.

A fiberglass fan using the standard general purpose resin is suitable for use with a wide variety of chemicals, but in extreme cases there are alternative resins and coatings that can be used to enhance the construction and duty point. The applications are endless.

There are however, limiting factors to consider such as temperature and abrasion. A fiberglass fan will be limited to moderate operating temperatures which can vary based on the chemicals in the airstream.

These temperatures can vary from just less than 100°F to just above 200°F. These fans are also limited to gaseous airstreams and do not hold up well against airstreams that contain solids or anything that could be deemed abrasive.

Fiberglass fans with a plastic composite construction are best suited to exhaust airborne corrosive gasses and mists that are prevalent in some applications. Corrosive gasses and mists in noxious environments cause premature wear on ventilation equipment and general damage, which in turn leads to the equipment failing prematurely.

Use of FRP ventilation equipment in corrosive environments provides a safe solution that will operate for a long time.

Corrosive environments contain gasses and compounds such as:

These compounds do not damage fiberglass fans.

Benefits of FRP Fans

Difference between FRP, PVC & PP

In addition to Fiberglass there are a couple of other plastic composite options to consider for corrosive applications. PP (Polypropylene) and PVC (Polyvinyl Chloride). Your decision will be based on the severity of the application.

The most severe applications are best suited using FRP or Fiberglass Reinforced Plastic. FRP can handle the highest temperatures, the highest pressures and the widest variety of contaminants of all of the options. FRP will also be the strongest construction as it includes layers of fibers within the construction creating strength.

PVC is another great option for corrosive applications. These fans are suited for many of the same applications as FRP but will be limited by pressures, environment and temperature.

PP (Polypropylene) is also a great option for corrosive duty applications. These fans are suited for many of the same applications as FRP but will be limited by size, air volume, pressures, environment and temperature.

Several factors determine which plastic composite should be used, which include:

Due to the aforementioned factors, FRP is typically used most often and is the most commonly produced. The PVC and PP materials are used less often.

Where there is destructive airstreams & particulate matter that causes corrosion to equipment a plastic fan is imperative for the longevity of industrial fans.

Therefore, FRP is applied to industrial fans in order to benefit from:

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Types of Axial Fiberglass Fans

Fiberglass axial fans are available in both belt and direct drive. Each style is suitable for various corrosive applications. Fans are ABS & AMCA certified.

How are FRP Axial Fans Constructed?

The axial fans are fitted with a fiberglass reinforced plastic (FRP). The fan is then coated with a resin that is fire retardant. The components, such as the bearings, drives and fan shaft, are protected from corrosion in a couple of ways.

Some styles will use an air tight enclosure while others will draw fresh air from outside of the fan across the components. This ensures that corrosive fumes are not able to reach the moving components.

Access to inspect and maintain the internal components is available through an optional gasketed access panel. To prevent fumes from escaping the drive opening a shaft seal is applied to the opening around the shaft.

Several considerations are made in order to reduce maintenance. The most important is bearing lubrication which is served by lubrication lines that run to the exterior fan housing.

Another is properly sizing the shaft and bearings for the performance and speed. This is performed to increase the fan’s lifecycle as well as and reduce maintenance. To isolate the motor from the airstream the motor is placed outside of the airstream on an adaptable epoxy coated steel base.

Fiberglass Fan Accessories

In addition to fiberglass fans, additional components are available for FRP, PVC & PP fans. A trained specialist is able to assist in determining the appropriate accessories along with the proper fiberglass materials depending on the environment.

Fiberglass Fan Applications

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At R. Williamson & Associates we are here to help you select the perfect equipment for your application. More than 50 years of experience with Hartzell Fans makes us your best option for a customized fiberglass fan.

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