Grizzly G0673, G0671, G0672 owner manual Designing System, General Duct Material, Metal Duct

SECTION 4: DESIGNING THE

SYSTEM

General Duct Material

The Model G0671/G0672/G0673 can be operated as either a stationary or mobile unit. There are advantages and disadvantages to both set-ups. The advantage of the mobile system is eliminating the cost of many ducts and fittings. On the other hand, the stationary system is more versatile and convenient.

The Model G0671/G0672/G0673 is designed to be a central dust collector system. Locate the dust collector in an out of the way location such as a corner or separate room. These machines can accomodate the following number of machines each drawing 400 CFM on a 4" dust port:

G0671:	8
G0672:	9
G0673:	12

The large suction capacity of the Model G0671/ G0672/G0673 allows great flexibility in planning and designing of your dust collection duct layout. Grizzly offers a complete line of dust collection accessories for setting up a stationary system. Additionally, Grizzly offers a complete guide book titled Dust Collection Basics.

A 4-port inlet is included with the Model G0671/ G0672 and a 5-port inlet is included with the Model G0673 for quick and economical dust col- lection setup. However, depending upon your system design using this feature, bags may fill at different rates requiring you to empty some bags more often than others.

Whatever system you choose, always make sure there are no open flames (including pilot lights) in the same room as the dust collector; otherwise you risk an explosion if dust is dispersed into the air.

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You have many choices regarding main line and branch line duct material. For best results, use metal duct for the main line and branch lines, then use short lengths of flexible hose to connect each machine to the branch lines.

Plastic duct is also a popular material for home shops. However, be aware that there is a fire or explosion hazard if plastic duct material is used for dust collection without being grounded against static electrical charge build-up. This topic will be discussed later in this section. Another problem with using plastic is that it is less efficient per foot than metal.

Metal Duct

Advantages of metal duct (Figure 24) is its conductivity and that it does not contribute to static electrical charge build-up. However, static charges are still produced when dust particles strike other dust particles as they move through the duct. Since metal duct is a conductor, it can be grounded quite easily to dissipate any static electrical charges.

Figure 24. Examples of metal pipe and

components.

G0671/G0672/G0673 Dust Collector