Jump to content

  • Quick Navigation
Photo

Measuring postive air pressure - High care

Share this

  • You cannot start a new topic
  • Please log in to reply
4 replies to this topic

SamBat

    Grade - Active

  • IFSQN Active
  • 6 posts
  • 0 thanks
0
Neutral

  • United Kingdom
    United Kingdom
  • Gender:Male

Posted 25 September 2019 - 07:33 AM

Hi all,

 

Please move if this is in the incorrect forum, it was most appropriate I could find.

 

There is a clause for one of our customers that is as below:-

 

"High care/risk areas shall maintain positive pressure such that all air movements are in the direction from high care/risk to low risk. Positive air pressure shall be demonstrable at all product and equipment transfer points and a system shall be in place to regularly monitor and record positive pressure. "

 

The site that I'm currently at have not performed any checks recently, due to staffing issues/changes.  Also the procedure for checking positive air is simply to use an anemometer held at the opening.  The anemometer is only measuring speed of air flow, not direction!? 

 

How do others manage checks on positive air flow?  At a previous site we simply used a piece of paper held over the opening between areas, to visually check the air was flowing in the correct direction.

 

How about frequency? Current procedure states weekly checks, which seems excessive (especially as they currently aren't up to date).

 

Any feedback is much appreciated.

 

Thanks,

Sam.

 



Charles.C

    Grade - FIFSQN

  • IFSQN Moderator
  • 20,542 posts
  • 5662 thanks
1,544
Excellent

  • Earth
    Earth
  • Gender:Male
  • Interests:SF
    TV
    Movies

Posted 25 September 2019 - 10:00 AM

Hi all,

 

Please move if this is in the incorrect forum, it was most appropriate I could find.

 

There is a clause for one of our customers that is as below:-

 

"High care/risk areas shall maintain positive pressure such that all air movements are in the direction from high care/risk to low risk. Positive air pressure shall be demonstrable at all product and equipment transfer points and a system shall be in place to regularly monitor and record positive pressure. "

 

The site that I'm currently at have not performed any checks recently, due to staffing issues/changes.  Also the procedure for checking positive air is simply to use an anemometer held at the opening.  The anemometer is only measuring speed of air flow, not direction!? 

 

How do others manage checks on positive air flow?  At a previous site we simply used a piece of paper held over the opening between areas, to visually check the air was flowing in the correct direction.

 

How about frequency? Current procedure states weekly checks, which seems excessive (especially as they currently aren't up to date).

 

Any feedback is much appreciated.

 

Thanks,

Sam.

 

The frequency depends on the variability.


Kind Regards,

 

Charles.C


greencheese

    Grade - Active

  • IFSQN Active
  • 6 posts
  • 1 thanks
0
Neutral

  • Earth
    Earth

Posted 25 September 2019 - 01:46 PM

We currently use a stick lighter to note direction and the anemometer to note speed. We feel the lighter is more accurate than paper because it is not solid so it shows the air better.



SQFconsultant

    SQFconsultant

  • IFSQN Fellow
  • 4,630 posts
  • 1135 thanks
1,126
Excellent

  • United States
    United States
  • Gender:Male
  • Interests:Just when I thought I was out - They pulled me back in!!!

Posted 25 September 2019 - 02:20 PM

There is positive and there is negative air flow.

 

Recently a client had to install a positive air flow system as their one building of three had a negative high-speed air flow.

 

As a safeguard they have installed mini wind socks on stanctions with air flow directional and meter to check speed of flow.

 

Very interesting subject indeed.


All the Best,

 

All Rights Reserved,

Without Prejudice,

Glenn Oster.

Glenn Oster Consulting, LLC -

SQF System Development | Internal Auditor Training | eConsultant

Martha's Vineyard Island, MA - Restored Republic

http://www.GCEMVI.XYZ

http://www.GlennOster.com

 


JohannesTrithemius

    Grade - AIFSQN

  • IFSQN Associate
  • 32 posts
  • 8 thanks
6
Neutral

  • Canada
    Canada

Posted 10 October 2019 - 02:07 PM

Stickers showing flow, a gauge at the compressor holding tank, a gauge at all the assets which use air, on the same fitting as the air filters & regulators.





Share this


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users