Filtration
Filtration
(OP)
I there a difference between absolute filter efficiency rating and beta ratio? Is there a ASTM standard related to this subject?
Thanks
Tom
Thanks
Tom
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Contact USThanks. We have received your request and will respond promptly. Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting Guidelines |
|
Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.
Here's Why Members Love Eng-Tips Forums:
Register now while it's still free!
Already a member? Close this window and log in.
RE: Filtration
Beta ratios are given for specific micron ratings. For example, a B10 = 200 means that a filter has a Beta ratio of 200 for a 10 micron size. a B5 = 200 would have Beta ratio of 200 for a 5 micron size.
The efficiency of the filter is determined by taking the Beta ratio minus one, dividing it by the Beta ratio, and then multiplying by 100. An example for a Beta ratio of B10=200 is --> [(200 - 1) / 200] X 100 = 99.5%. So this filter is 99.5% efficient in removing particles of 10 micron size.
Regards,
Schlebb