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Anonymous

Re: Laminar flow hood materials -- locally for $150 bucks [Re: SixTango]
    #1217347 - 01/14/03 08:56 AM (21 years, 2 months ago)

Any V8 truck filter should handle at least 650cfm most closer to 900cfm. There are many square filters available also.

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OfflineAnnoA
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: ]
    #1217691 - 01/14/03 10:28 AM (21 years, 2 months ago)

>Any V8 truck filter should handle at least 650cfm most closer to 900cfm.

The question is not if the filter handles it, but if your blower handles it.
The resistance of a too good(fine)/too small prefilter could be such that you?d need a much, much more powerful blower than you would with a simpler prefilter.

Think of it as of having 2 HEPAs, one in front and one at the back....

Edited by Anno (01/14/03 10:31 AM)

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Invisiblei am e goldstein
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Post deleted by Administrator [Re: Anno]
    #1217776 - 01/14/03 11:03 AM (21 years, 2 months ago)



--------------------
Who controls the past controls the future. Who controls the present controls the past.
3DSHROOMS is either clueless or the worlds biggest SCUMBAG
I lie and exagerate constantly... God Bless America!

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OfflineAnnoA
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: i am e goldstein]
    #1217828 - 01/14/03 11:22 AM (21 years, 2 months ago)

>f the engineering data of the blower is say 400 cfm at .85 sp and i'm passing that
>air through a filter that can accomodate 900 cfm at .85, the air delivery through
>that filter will be 400 cfm?
No, becuase the s.p.(static pressure) will be smaller, since the filter has the s.p. of .85 at 900cfm, this means less s.p. at 400cfm, which means that the air output through that filter will be somewhere between 400 and 900cfm. I can?t tell it exactly without knowing the characteristic curves of the blower and the filter.


> what would be considered the ideal air speed moving across ur work?
According to stamets 100 ft/min.

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Offliner05c03
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: Anno]
    #1218023 - 01/14/03 12:15 PM (21 years, 2 months ago)

Laminar or not, they work, I have an older model sterile work hood that is built exactly on this design. However it is critical to have a shield, restricting air flow towards the bottom, so that the velocity is fast where you are down and working. That is the only draw back of the desgin, you do not have an entirely open work space like a laminar hood.


--------------------
Listen! Do you smell something?

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OfflineAnnoA
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: r05c03]
    #1218046 - 01/14/03 12:22 PM (21 years, 2 months ago)

I did not say it doesn?t work, I know it does, but the flow is likely not laminar, thus the term "laminar flow hood" is wrong.
I was nitpicking a bit, please notice the smiley with my comment, don?t take everything I say too  seriously, life is too  short  for it... :frown: 

Edited by Anno (01/14/03 12:23 PM)

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Offliner05c03
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: Anno]
    #1218058 - 01/14/03 12:28 PM (21 years, 2 months ago)

Yeah anno, good self advice. I too was merely making a moderate comment about the functionality.



--------------------
Listen! Do you smell something?

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Offliner05c03
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: r05c03]
    #1218064 - 01/14/03 12:30 PM (21 years, 2 months ago)

  :laugh:


--------------------
Listen! Do you smell something?

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InvisibleSixTango
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Registered: 01/21/02
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Loc: A little North of Paradis...
Re: Laminar flow hood materials -- locally for $150 bucks [Re: i am e goldstein]
    #1218343 - 01/14/03 02:48 PM (21 years, 2 months ago)

Mixing gizmo:
Best pic I could get with a childs digi that will not close focus. Jar is 1 gallon. Will post a better one (inside & out) as soon as my digi returns home from vacation with g/f. 6T


--------------------
~whiskey river rafting, hot tubbing, dirty dancing & spending money on - wild women - having fun & just gonna waste the rest~

Edited by SixTango (01/14/03 03:11 PM)

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Offline420M
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Registered: 10/29/02
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Re: Laminar flow hood materials -- locally for $150 bucks [Re: SixTango]
    #1227989 - 01/18/03 01:46 AM (21 years, 2 months ago)

I built a flowhood from scratch based upon SixTango's design.

Here it is : 420M's Flowhood

Hope it Helps Someone!!

~ M ~

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