OPERATIONS
Model W1823 (Mfg. Since 9/10)
Flexible Duct
Flexible hose is generally used for short runs, small shops and at rigid
The superior choice here is metal flex hose that is designed to be flexible, yet be as smooth as possible to reduce static pressure loss.
There are also many kinds of pure plastic flexible hose,
such as
hose. Drainage type hose, while being economical, does Figure 27. Example of flexible metal duct. not quite have the flexibility required for dust collection.
The inside of the duct is also deeply corrugated and can increase the static pressure loss by as much as 50% over smooth wall duct. Dryer vent hose, while being completely flexible, is
If using
Plastic Duct
The popularity of plastic duct (Figure 28) is due to the fact that it is an economical and readily available product. It is also simple to assemble and easily sealed against air loss. The primary disadvantage of plastic duct for dust collection is the inherent danger of static electrical build- up.