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Dust Deputy Static Pressure Loss 2.5"

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Forum topic by Redoak49 posted 10-02-2017 01:07 PM 289 views 0 times favorited 4 replies Add to Favorites Watch
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Redoak49

2794 posts in 1771 days


10-02-2017 01:07 PM

I read so many articles about modifying the HF dust collector. However, few to none of them provide data on the effect on Static Pressure. While most people are only interested in flow, cfm, it is difficult to measure. It is much easier and more accurate to measure static pressure.

Has anyone actually measured the static pressure loss with the dust deputy?

Also, has anyone measured the change in static pressure with one of the cartridge filters.

The information would greatly help people understand the effect of the modifications.


4 replies so far

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Manitario

2506 posts in 2666 days


#1 posted 10-02-2017 02:00 PM

That’s a great question. Would also be interested to know if anyone has measured the CFM of the HF set up with a pitot tube and a manometer.

Generally speaking, a cyclone adds 2.4-3.5” WC to the static pressure of a system, more if it is just a simple pre-separator like a Thein.

-- Sometimes the creative process requires foul language. -- Charles Neil

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Redoak49

2794 posts in 1771 days


#2 posted 10-02-2017 02:48 PM

I believe the Wood Magazine article did a pretty good test of the HF Dust collector in 2008 and published a curve.

If the static pressure lost is in the 2-3” range, that will reduce the cfm significantly on the HF dust collector.

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Redoak49

2794 posts in 1771 days


#3 posted 10-02-2017 09:47 PM

I did some research and found a reliable source that says the static pressure increase is about 2.5”.

The figure below shows the HF Dust Collector Fan Curve and the effect of the increase of about 2 to 2.5” of static pressure.

If you system is configured so that you are getting about 550 cfm and you add the dust deputy, the flow will decrease to somewhere about 425 cfm. However, you gain your filter not clogging as quickly and easier to clean out the chips.

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Manitario

2506 posts in 2666 days


#4 posted 10-03-2017 04:22 AM

Thats interesting. Add a few feet of 4” flex hose and your CFM is almost down to 200…

-- Sometimes the creative process requires foul language. -- Charles Neil

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