MK Plastics Blog

Founded in 1963, MK Plastics is a global leader in the production of corrosion resistant industrial and commercial blowers, fans, and ventilation systems. Patented in several countries, our products are AMCA Certified for Air and Sound Performance.
We offer the broadest and most complete line of quality industrial and commercial corrosion-resistant fans and blowers. Our innovative ventilation technologies are patented in several countries.

Changing Motors on Direct Drive Induced Flow Fans

Artist Name - MKPlastics005-019 - Changing Motors on Direct Drive Induced Flow Fans.mp3
Direct Drive Swingout
Direct Drive EZ-4


All induced flow fans fit into two overarching types/categories: centrifugal induced flow fans and vertical inline induced flow fans. Both of those types of induced flow fans are available in belt drive or direct drive configurations. While belt drive induced flow fans offer many safety, adjustability, and motor changeout advantages, some clients want direct drive exhaust fans on their buildings.

Motor changeout on a direct drive fan of any type can be a time consuming, dangerous, and difficult task. You need to have access to the fan equipment and you need adequate room in the area. With induced flow fans, that means the fan must be laid down in the roof or penthouse and disassembled for removal and replacement of the motor.

Direct drive induced flow fans typically have to be removed from the system (and oftentimes removed from the roof itself) to change the motor and/or rebuild the fan. That can result in extensive downtime for the building and the system. For centrifugal induced flow fans, M.K Plastics offers two unique options in the industry: we make centrifugal induced flow fans in both fiberglass and coated steel construction.

For the fiberglass Axijet® M.K Plastics induced flow fans, we offer EZ-4® construction. This is a direct drive centrifugal induced flow fan with the impeller physically attached to the motor shaft. The motor pedestal assembly is track mounted, the drive side of the fan casing can be unbolted, and the motor pedestal assembly can be pulled away from the fan for easy access to the impeller. The impeller can be removed and the motor can be changed without removing the fan from the foundation, system, or building.

For steel fans, we reach the same goals somewhat differently—we offer a Swingout fan construction where the drive side of the fan assembly is on a door-type arrangement. The drive side of the casing unbolts, and that drive side is hinged on the fan casing. It swings out/open with the fan in place to provide access to the impeller for removal and motor replacement.

Once the motor is replaced on the EZ-4®, the track mount assembly is simply pushed back and bolted into place. On the Swingout fan, the Swingout door is closed, the latches are secured, the fan balance can be checked, and the fans can then be put back into service. Both options provide access to separate the impeller from the motor without having to remove the fan from the system or the roof.

Of course, no solution is perfect—there are minor tradeoffs with either the EZ-4® or Swingout construction. These fans do require a slightly larger footprint than a conventional fan. There is also a modest price increase for accessories that include these features. When you change the motor in a direct drive fan, you must expect inherent contact with the direct drive airstream fan component, which may or may not be an issue for a given application.

The EZ-4® and Swingout options for M.K Plastics Axijet centrifugal flow fans provide motor changeout in a much easier and less time-consuming range. Contact MK Plastics today for more details about the unique and innovative features that we offer.


MKPlastics005-019 Transcription

Shayla: Welcome to the MK Plastics Podcast. I'm talking today with Vice President of US Sales and Marketing, Keith Lins, and Keith, what can you tell us today about changing motors on direct drive induced flow fans?

Keith: Well, there are two types of induced flow fans. There are the centrifugal induced flow fan type and the vertical inline induced flow fan type and each of those induced flow fan types is available in either belt drive or direct drive configuration and while belt drive induced flow fans offer many safety, adjustability, and motor changeout advantages, some clients want direct drive exhaust fans on their buildings. Motor changeout on a direct drive fan of any type can be a time consuming, dangerous, and difficult task. You need to have access to the fan equipment, you need room in the area, and in the case of induced flow fans, that means on the roof or in the penthouse where that fan can be laid down and disassembled for removal and replacement of the motor. So a direct drive induced flow fan has to be typically removed from the system and oftentimes actually removed from the roof to change the motor, rebuild the fan, and that can mean a lot of downtime to the building and the system. For centrifugal induced flow fans, MK Plastics offers two unique options in the industry. We make centrifugal induced flow fans in both fiberglass and coated steel construction. For the fiberglass Axijet MK Plastics induced flow fans, we offer what we call EZ-4 construction. This is a direct drive centrifugal induced flow fan with the impeller physically attached to the motor shaft but the motor pedestal assembly is track mounted and the drive side of the fan casing can be unbolted and the motor pedestal assembly pulled away from the fan so that one has access to the impeller to remove the impeller and change the motor without removing the fan from the foundation or the system or the building. For the steel fans, we get to the same place a little differently. We offer a Swingout fan construction where the drive side of the fan assembly is on a door type of arrangement where the drive side of the casing unbolts and that drive side is hinged on the fan casing and swings out or swings open with the fan in place to provide access to the impeller for impeller removal and motor replacement. Once the motor is replaced on the EZ-4, the track mount assembly is just pushed back and bolted into place and on the Swingout fan, the Swingout door is closed and the latches are secured and the fan balanced can be checked and the fans put back in service. In either case, both provide access to separate the impeller from the motor without removing the fan from the system or the roof. No solution is perfect. Minor drawbacks with either the EZ-4 or Swingout construction are that these fans require a little bit larger footprint than a conventional fan and there is a modest accessory upcharge for these features. There's a price associated with it and when you have a direct drive fan by definition and you change the motor, you're going to have to deal with direct drive airstream fan component contact which may or may not be an issue on a given application. But, the EZ-4 and Swingout options for MK Plastics Axijet centrifugal induced flow fans provide motor changeout in a much easier and less time consuming range. So contact MK Plastics for more details about these unique features that we offer.

Shayla: And that contact number for MK Plastics is 888-278-9988.

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Monday, 26 June 2017
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