filter cover over TEFC shroud... what the...? 2

[electricpete]

What is the purpose of this thing

http://www.reliablefilter.com/filters/motor_fan_filters.htm

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[Skogsgurra]

It is obviously a dust collector. A Little like a vacuum cleaner. At least, that is what the symbol (with the red arrows) seems to indicate. Yes, joking (trying to). I think that someone should tell those guys which way air blows.

Snake oil, if you ask me. Dust on the motor should be removed by maintenance. Putting a filter that will eventually clog is definitely not a good idea.

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[Compositepro]

It seems to be one of those things that might seem like a good idea, but isn't. Even a clean filter, that small, will significantly reduce motor cooling. They probably did not know the difference between an open motor and a totally enclosed fan cooled motor when they took the picture. I have used ShopVac filter cartridges over small universal motors when using them to mix low-melting powders.

 

[ScottyUK]

Nearly four months late. ;-)

 

[itsmoked]

It's a tool for closing businesses that are failing by using fire insurance money.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[electricpete]

I'm in line with the rest of you guys. TEFC air doesn't go inside the motor, so no reason to filter it. If the air is so bad that you're worried about the fan getting clogged with grunge, then you can shut it down and clean it from time to time. I don't have confidence that a clean / new filter won't affect air flow, much less if used in an environment bad enough that you're worried about needing this thing just to protect the fan. And looks sort of like a shower cap … who's to say it's not going to get sucked through the grating into the fan.

They probably did not know the difference between an open motor and a totally enclosed fan cooled motor when they took the picture

I'm thinking you're right.

Nearly four months late.

I don't follow.

It's a tool for closing businesses that are failing by using fire insurance money.

LOL.

It is obviously a dust collector. A Little like a vacuum cleaner. At least, that is what the symbol (with the red arrows) seems to indicate. Yes, joking (trying to). I think that someone should tell those guys which way air blows.

I totally missed those red arrows! Literally (almost) ROTFL.
It only adds to the comedy value of what was already a joke of a page.


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[Artisi]

I don't see it as a filter for open dripproof but as shown, filter on a TEFC motor, looks good but useless in real life, the amount of dust collected before chocking would have little effect on an "unfiltered" unit with that amount of dust deposited on the motor.
About as useful as an ash-tray on a motor bike.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[spciesla]

For motors going into surgery?

 

[macmckim]

I remember seeing something similar many years ago, filter covers were used on TEFC motors used in the cloth manufacturing plants in North/South Carolina areas.
Kept the flying threads,cloth dusts etc from plugging up the fan guard cover, cooling fan fouling etc.

 

[electricpete]

Maybe you're right and there is some logic to it in some situations.

At first I didn't see any discussion of pressure/flow relationships. Now I see they call it FP50, with a link that gives some pressure/flow relationships (while clean… not sure about when dirt-laden) which might be used to get a very rough idea of impact on cooling flow.

I also see the funny red arrows show on every page of the website, so they're not associated with representing motor airflow.

darned, my parade has been rained upon.


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