In a cleanroom, there are usually positive and negative pressures, each serving its own purpose, and different parameter values need to be adjusted for them to function. What is the purpose of the positive and negative pressures in a cleanroom? Below, the editor will answer this question for you.

1. Cleanroom Positive Pressure

Maintaining a positive pressure in the purification workshop is crucial for ensuring that the production area is not, or minimally, affected by environmental contamination, and is an indispensable standard to maintain the cleanliness level of the design as a cleanroom. Even in a negative pressure purification workshop, it must have a positive pressure in at least the adjacent rooms or suites that are not less than its cleanliness grade, in order for the cleanliness grade of the negative pressure production area to be sufficient.

During the interior decoration of a purification workshop, the corridors in the clean area are typically maintained at positive pressure, which is higher than the operational room but lower than the areas with concentrated pollutants. This is to prevent the outward diffusion of contaminants, hence generally kept at positive pressure.

Positive pressure indicates the capability of a cleanroom to inhibit environmental pollution from air gaps around windows and doors, or to reduce indoor air pollutants to a minimum when windows and doors are opened briefly. The positive pressure size indicates the level of pollution inhibition capability, but it is not necessarily the case that the higher the positive pressure, the better.