Differential air pressure (DAP) services are part of our complete cleanroom certification services.
An air pressure differential test is used in many kinds of rooms to isolate a process or object via the flow of air. A positive-pressure room is designed to move differential air away from a protected area so contamination is not introduced in. (e.g. An ISO Class 8 clean area should be protected from the contamination coming from any surrounding area that is less than an ISO Class 8 level of cleanliness.) Conversely, a negative-pressure room is designed to move differential air into an isolated area to protect the surrounding areas from exposure to what is inside that space. (e.g. The rooms surrounding a toxic product or infectious agent should be protected from the contaminated area.)
To test these critical elements, CAS Clean Air Services uses Differential Air Pressure meters, called nanometers, fully calibrated by a 3rd party Swiss Accredited laboratory, thereby maintaining our impartiality. Audit ready calibration certificates are provided with your final report.
Since the goal of Cleanroom Certification is to provide evidence of the performance of a room from the process point-of-view; this information, together with other variables (air velocity and volume, TRH, smoke studies, etc.) provides vital information about where to place continuous monitoring sites. It is important to identify and test the most critical and vulnerable sites in the process in order to maintain control of the environment. Differential Air Pressure is a critical measurement required to effectively qualify a clean room or area and create an environmental monitoring plan based on risk analysis. (per ISO 14633 and Annex 1, Draft) Our highly trained CAS Technicians perform this testing and use the information gathered as one piece of an overall picture characterizing the environmental risks to the clean area.
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