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Clean Shop Air,  LLC
Welded  All-Steel  Blower  Housing  for  18-inch  Cyclones

Quality, Ready-to-Use,
Blower Housing for 18"
Cyclone Dust Collectors

We produce a high-quality, steel blower housing for use with our 18" cyclone dust collector kits:

  • All-steel construction for strength.
  • Welded seams all the way around the housing.
  • Welded mounting ears for convenient mounting.
  • Shipped complete, including mounting bolts for the cyclone separator and the motor.
  • Compatible with standard C-face motors, including our own Leeson 5-HP power unit.

Sturdy Construction

The housing is built using 14-gauge mild steel for the housing itself, with a sturdy 9-gauge (5/32") or 7-gauge (3/16") round, steel mounting plate for the motor. The plate attaches to the housing with 12 bolts and locknuts.

Blower Mounting

Four sturdy mounting ears are provided for attaching the housing to a support of your choice. You can use suspension hangers from a ceiling, attic, or roof structure above, a wall-bracket mounting system, or a floor stand. Each ear is punched for a 1/2" bolt for easy attachment of anti-vibration shock mounts to prevent transfer of any vibration noise in the dust collector or motor into the framework of the building, further reducing noise from the system.

Powder-Coat Finish

The blower housing and motor-mounting plate are finished with a high-quality industrial powder coat applied by a local firm known for their exceptionally high-quality work. Every unit is thoroughly sand-blasted inside and out to remove all mill scale, rust or other surface contaminants, thus preventing any barriers to good coating adhesion. This ensures a quality product that will serve you well for a very long time.


Outside dimensions are:

  • 6 inches high
  • 22 inches wide
  • 23-1/2 inches deep when viewed with the outlet facing directly toward the observer on the observer's right.

Outlet Connections
to Exhaust Ducting

The outlet opening is tapered down somewhat to allow the installation of a standard 8-inch HVAC duct around the outside of the outlet by bending corners into the pipe to match the outer corners of the outlet. The ducting can then be attached with normal sheet metal screws or other methods, according to preference. Alternatively, a flexible connection such as standard HVAC canvas connections can also be used to isolate the outlet from the rest of the external system to minimize the transfer of any mechanical noise from the motor or blower into the ductwork and filters.

What Else Do I Need?

To build a complete blower unit, you need a standard C-56-mounting blower motor and impeller. The recommended motor for this application is a 5-HP Leeson compressor-duty motor with factory-installed C-face mounting now available from us. We also produce a high-quality impeller that is matched to the housing and the 5-HP motor for a very effective blower with plenty of air-moving capacity.

What Performance
Can I Expect?

The blower is critical to overall system performance. Like the engine in a motor vehicle, no amount of system refinement can compensate for an inadequate blower. The following performance figures are the result of measurements performed using an impeller similar to the 14" impeller used in Jet-brand cyclones, measured at low altitude. We do not yet have measurements for our impeller which is taller and therefore moves somewhat more air. Measured performance of a 12-3/4" airfoil impeller is included in the third column on the right for comparison and to show why we do not recommend an airfoil impeller (note that airfoil impellers are not compatible with this blower housing):

Static Pressure Air Flow in CFM Airfoil CFM
0"    1550    1400   
4"    1500    1400   
5"    1475    1350   
6"    1425    1300   
7"    1350    1150   
8"    1250    800   
9"    1150    0   
10"    975    0   
11"    800    0   
12"    600    0   

Note that the 18" cyclone requires a minimum of 800 CFM air flow to operate properly. Air flow rates less than about 800 CFM result in dramatically reduced ability to separate fine dust from the incoming air, and will result in faster filter loading, plugging, and seriously degraded system performance. We do not recommend blowers with impellers smaller than 14 inches in diameter. 12 inches (water column) of static pressure is approximately equal to 7/16 pound per square inch.

Note also that these air-flow measurements are for a single, specific blower and impeller attached to a standard inlet tube of a specific diameter and length. They likely are not identical to other similar units, especially if operating at a different altitude or in a different configuration. Performance figures listed here are for relative comparison only. To determine actual performance of a given system, measurements must be performed separately on that system under actual operating conditions. For most users, allowing about 2 inches of static pressure drop through the cylcone is reasonable for estimating expected performance of installations running 6-inch ductwork with well-designed pick-up hoods and air flows in the 900-1400 CFM range.

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Updated September 23, 2004

©Copyright 2004, Clarke F. Echols and Clean Shop Air, LLC. All rights reserved.
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