Yesterday into today, I've been shopping for laminar flow HEPA fan filter modules for the PSOMA optical enclosure. I didn't find a lot of LIGO documentation listing specific filters, but here's what I've found online with some downselection on 'low vibration / high filter quality'. Please let me know If there's a company we often use, or if you can help direct this search at all.
Another consideration is flow rate relative to our volume. I can do this calculation, but what is the particle density (eg at 0.3 um) we want to achieve inside the enclosure? I realize that I never got the particle counter recording despite it being on my list, so I'll try to do that remotely today. We need to know the ambient particle count and the clean volume in the enclosure.
Company
|
Part number / name
|
Price
|
Filter
|
Sound
|
Link for info
|
Notes
|
| Terra Universal |
Smart Whisperflow Fan Filter Unit |
$1,111 |
HEPA (H10-100k) |
40 dB @ 90 ft/min velocity @ face |
datasheet, product page |
The 'Smart' model has 9dB less noise than the standard, but costs about $500 more. Also comes in 'low profile' version. |
| Clean Air Products |
CAP118 |
|
HEPA |
-- |
product page |
requested quote |
| Thomas Scientific |
Fan filter module, "low noise" |
$1,760 |
HEPA |
|
product page |
|
| Price Industries |
LFDC series laminar flow diffusers |
|
|
|
product page, datasheet |
|
| Envirco |
Mac 10 original |
|
|
51 dBA @ 90 FPM |
datasheet |
referenced in T2000382 |
| A-J MFG |
SSLFHFD-FP "criti-clean" fan filter |
|
HEPA |
45dBA @ 90 FPM |
product page |
claims to be the lowest-height unit on the market (13.7''). The RFQ page looked fishy though, so I held off. |
| FungiFun |
(website) |
|
|
|
link |
lists a number of other filter suppliers, by country |
*all prices listed here are from publicly available pages |