Home
Products
Services
Validations
Quality 
FAQ
Sitemap
Enquiry

Frequently Asked Questions (DOP Testing)

Question <--- What happens to the DOP once it is in the system ? --->

<---Answer--->
  

 

             The DOP particles, being a liquid aerosol, impinge on the surfaces of the glass fibres making up the filter, and are trapped there, Each tiny droplet spreads out to form a mono-molecular layer on the surface, and since the surface area is extremly large, there is little chance of saturation. it would take an extremly high concentraation of DOP, generated very close to the filter surface, to cause wetting out. Once the DOP is trapped, it stays on the fibres and is not released

 

Click Here For Useful Information ( Cleanroom Related )

Click Here For Advanced Cleanroom Products

   Why should anyone use a laminar flow system ?
   What actually a laminar air flow system ?
   How are the High-efficiency particulate air ( HEPA filters) tested ?
   what specifications or standards apply to testing the filters in place ?
   Is this in-place filter test the same one as the filter manufacturer uses ?
   What is the procedure for in-place test?
   What does percent of penetration mean ?
   Why was 0.01% established as a significant ?
   Why can't the leak test be run with ambient air within a room ?
   If plates to obtain bacterial counts are used, must the in-place test still be run ?
   Can leaks not be detected by agar plates ?
   How about impingement devices ? 
   Is DOP aerosol harmful to the filters ?
   What happens to the DOP once it is in the system ?
   When DOP is used to test a system, does the room have to be wiped down ?
   Has DOP test been accepted by the pharmaceutical industry ?
   with reference to Fed. Std. 209b, What is the relationship of the various classes of       clean rooms( 100, 10 000, and 100 000 ) to the 0.01% figure ?
   Can a particle counter not be used to determine the class of the room ?
   But isn't a particle count important data ?
   But, why can't leak test be carried out with a particle counters ?
   What are the advantages of the DOP in-place test over attempting a leak test       with a particle counter ?
   How often should the DOP in-place test to be run ?
   What qualifications are necessary for in-place test personnel ?
   when should the HEPA filters be replaced ?
   Do all filter material makers and filter manufacturers use the same mehtods for      testing their products ?