Blast gates are used to focus a dust collection system's vacuum pressure for maximum dust (or other material) extraction at the desired location. Blast gates are positioned near individual pieces of machinery and operate by being, by default, closed — blocking air flow. When one blast gate is opened, all available suction is focused at that location, maximizing the amount of material collected.
Note that in larger dust collection system installations with more available power, multiple blast gates may be opened at the same time without detriment to collection abilities at individual locations. In fact, some systems are so powerful that at least one blast gate must be open at all times, or the system can collapse itself.
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Famous quotes containing the words blast and/or gate:
“What if there’s nothing up there at the top?
Where are the captains that govern mankind?
What tears down a tree that has nothing within it?
A blast of wind, O a marching wind,
March wind, and any old tune,
March march and how does it run.”
—William Butler Yeats (1865–1939)
“Enter through the narrow gate; for the gate is wide and the road is easy that leads to destruction, and there are many who take it.”
—Bible: New Testament, Matthew 7:13.