Clean Room Pressure Differential
Clean Room Pressure Differential
(OP)
Can anyone tell me if there is a standard pressure differential requirement for clean spaces. I work on 15Pa with an alarm setting of 10Pa.
One of our clients insists that it is 15Pa minimum (i.e. alarm status) so we need to control/aim for to 20Pa.
I think anything over 20Pa would make the doors hard to open anyway, so the norm is 15 with a 10 alarm status.
Any one got any documentational evidence that the client is right?????
PS the job is the pharmaceutical production of tablets etc.
One of our clients insists that it is 15Pa minimum (i.e. alarm status) so we need to control/aim for to 20Pa.
I think anything over 20Pa would make the doors hard to open anyway, so the norm is 15 with a 10 alarm status.
Any one got any documentational evidence that the client is right?????
PS the job is the pharmaceutical production of tablets etc.
Friar Tuck of Sherwood





RE: Clean Room Pressure Differential
I have generally used 15Pa as the design DP for segregation of clean rooms. Yes the higher DP will make opening of swinging PA doors harder, the main problem may be in keeping them closed! As in all things the customer is always right, sometimes missguided, but right! Do teh design fort he higher DP but allow for it to be lowered during commissioning when doors swing violently or trap people in the rooms!
Good Luck
Mark Hutton
RE: Clean Room Pressure Differential
My experience is that, for a 1.8mW x 2.1m H doors, you can go upto 30Pa without problems. Beyond that we require extra push.
RE: Clean Room Pressure Differential
RE: Clean Room Pressure Differential
HVAC68