Differential pressure is the difference in air pressure between two locations within a system.
A room with higher pressure than its surroundings is said to have positive pressure.
A room with lower pressure than adjacent areas is said to have negative pressure.
Positive pressure areas keep particles out, while negative pressure areas prevent the escape of
potentially harmful substances.
The pressure differential is maintained according to the Standard ISO classes. ISO 14644-4
recommends a pressure differential from room to room of 5 to 20 Pascal.
According to WHO guidelines on HVAC system 10-15 of pascals.
Differential pressure is important in pharmaceutical environments.
๐๐ผ๐ป๐๐ฎ๐บ๐ถ๐ป๐ฎ๐๐ถ๐ผ๐ป ๐๐ผ๐ป๐๐ฟ๐ผ๐น:Maintaining differential pressure helps prevent the entry of
contaminants, such as dust, bacteria, or viruses, into critical areas like cleanrooms or sterile
processing areas.
๐๐ฟ๐ผ๐ฑ๐๐ฐ๐ ๐๐ป๐๐ฒ๐ด๐ฟ๐ถ๐๐: In pharmaceutical manufacturing, certain processes require specific
pressure differentials to ensure the integrity of products, such as preventing cross
contamination between different drug formulations or protecting sensitive materials from
exposure.
๐๐ฎ๐ณ๐ฒ๐๐: Differential pressure is crucial for the safety of personnel working with hazardous
materials. Negative pressure areas can contain airborne pathogens or volatile substances,
minimizing the risk of exposure.
๐๐ฒ๐ด๐๐น๐ฎ๐๐ผ๐ฟ๐ ๐๐ผ๐บ๐ฝ๐น๐ถ๐ฎ๐ป๐ฐ๐ฒ: Many pharmaceutical facilities must adhere to strict regulations
and guidelines, such as Good Manufacturing Practices (GMP) and Good Laboratory Practices
(GLP). Proper differential pressure control is often a regulatory requirement.
Differential pressure is maintained between manufacturing and surrounding areas.
The aseptic area should always be highly pressurized than the non-aseptic area and air flow
should be always from the aseptic to non-aseptic area.
This pressure differential is maintained by HVAC system.
In tablet production area, pressure differential helps to prevent the cross-contamination.
The pressure unit, ๐บ๐บ๐๐ฐ, stands for millimeters per water column.
