Page 1 of 1
Leakage CFM
Posted: Mon Jan 05, 2015 9:13 pm
by cnsperf
How much leakage is acceptable? I am getting 8 CFM at 28"H2O. Do I just subtract that from my flow numbers or calibrate the cd of the orifice to show 8 CFM less than what the plate should be flowing? Thanks in advance for the responses.
Chris
Re: Leakage CFM
Posted: Mon Jan 05, 2015 10:07 pm
by jfholm
cnsperf wrote:How much leakage is acceptable? I am getting 8 CFM at 28"H2O. Do I just subtract that from my flow numbers or calibrate the cd of the orifice to show 8 CFM less than what the plate should be flowing? Thanks in advance for the responses.
Chris
Chris,
have you looked to find the leak? I think I would look for the leak first as it may be something that is getting worse. If it continues to increase you may think your readings are calibrated but they may be changing on you.
John
Re: Leakage CFM
Posted: Tue Jan 06, 2015 8:47 am
by 1960FL
How much leakage is acceptable?
Across the orifice internal plate? I/E in the intake mode with the top sealed off NONE. you should not have any leaks in this area.
Rick
Re: Leakage CFM
Posted: Tue Jan 06, 2015 8:54 pm
by cnsperf
I don't think I had the top sealed off well enough. I will try it again with a blank orifice plate. Thanks for the help.
Re: Leakage CFM
Posted: Mon Jan 12, 2015 2:35 pm
by Malvin
1960FL wrote
Across the orifice internal plate? I/E in the intake mode with the top sealed off NONE. you should not have any leaks in this area.
Like this
http://youtu.be/10ISjMwJuwU
Re: Leakage CFM
Posted: Fri Jan 16, 2015 6:39 pm
by Malvin
This video I did is unavailable now so this link will not work any more
http://youtu.be/10ISjMwJuwU
I am making a new video