Air shower

Cleanroom air shower with blue floor sticky mat.

The term air shower can refer to the specialized antechamber which is passed through before entering a cleanroom in order to blow off excess dust particles from cleanroom personnel before they enter, to minimize contamination. HEPA filters are generally used to decontaminate a room by filtering out particles greater than 0.3 micrometres in size.

This kind of local purifying equipment is located between clean room and unclean room. They are designed to blow air in different directions. Single-side shower, double-side shower, three-side shower and top shower. Spraying wind speed usually goes above 25 m/s through stainless steel nozzles.

As a percentage of the total cost of the modern cleanroom, the cost of an air shower is virtually insignificant. In any application where contamination is critically important—such as life science, biomedical, pharmaceutical, parenteral drug, microelectronics, aerospace and precision manufacturing—air showers should be considered essential equipment. If its use could eliminate contamination of one expensive batch of pharmaceutical chemicals or the rejection of one semiconductor wafer, for example, it is money well spent. Perhaps millions of dollars could be saved. In addition, from a psychological point of view, having operating personnel pass through an air shower before entering the work area, reinforces the fact that cleanliness to the operation is essential. This, hopefully, reinforces the concept that protection of the product from personnel is a significant concern.

Purpose

External links

• Cleanroom Entry & Exit Procedures
• Air Showers used at NASA

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