Flowhood

Started by Sr_Setahongo, June 01, 2004, 05:30:21 AM

Previous topic - Next topic

Sr_Setahongo

Hi,

I purchased a HEPA filter rated H14 99,995% ef. on 0,3 microns, 300 Pa and 305x610x292mm and I want to get the correct blower.
According to the example of "match a suitable blower" in the Flowhood pictorial, my filter is the same except for the 300 Pa initial resistance and the 292mm.  In the example the HEPA filter is at an initial 250 Pa + 50 Pa for the prefilter = 300 total. Mine is 300 + 50 for the prefilter=350 Pa initial resistance. How many more cfm?s do the blower need to work at to get the desired 0,5m/sec.-30m/min-1800m3/hour for that initial resistance and the 292mm?


I hope somebody understands what I mean  :D

Thanks anyhow  :lol:  

anno

It depends on the blower, on the working curve of the blower.

You want a blower that outputs 340m3/h at 350 Pa.

Sr_Setahongo


stinkbuttdog

as long as were on the topic, what is the formula for the amount of cfm's needed for whatever measurement is used for the opposing HEPA filter? I've never used a flow hood but can see many benefits to doing so... as should everyone

psilocybin warrior

whats a flowhood for?


Waldarbeiter

#6
Hey folks,

I just ordered a blower which I intend to use for constructing my own laminar flowhood.

Specifications (Model R2E190-A026-55, ebm Papst):
air volume 570 m³/h
Schalldruckpegel  62    dB(A)   <--- is this the static pressure?

I am not sure whether or not this blower suffices for building a flowhood ????

Thanks alot for any helpful comments,
W



What followeth is the technical information, in German:
Technische Daten
     
Spannung    230    ~ VAC
Frequenz    50    Hz
Volumenstrom    570    m³/h
Drehzahl    2500    1/min/2700
Leistungsaufnahme    58    W/75W
Stromaufnahme    0.26    A/0,34A
Kondensator Kapazität    2.0 / 400    uF/V
Schalldruckpegel    62    dB(A)
Umgebungstemperatur 50Hz    -25 .. 50     °C
Material Lüfterrad     Kunststoff PA 6.6
Lagerung    wartungsfreie Kugellager
Drehrichtung    rechts, auf Rotor gesehen
Anzahl Lüfterradschaufeln      7
Kabelausführung    variabel
Einschraubtiefe    max. 5 mm
Betriebsart    S1
Isolationsklasse    "B"
Schutzklasse    I
Schutzart    IP 44
Motorschutz    Temperaturwächter
Gewicht    Temperaturwächter




edit:
The HEPA Filter I am gonna use is a 
240-03050610-M078E080
HS-Mikro SF, Gr.:305x610x78 mm, EN 1822 Kl. H14"

anno

>Specifications (Model R2E190-A026-55, ebm Papst):

This is an axial blower and is NOT suitable for building a flowhood, because it doesn't deliver air against static pressure.

>Schalldruckpegel  62    dB(A)   <--- is this the static pressure?

No, this is the noise the blower produces.

>I am not sure whether or not this blower suffices for building a flowhood ????

No, it doesn't.