Puhtaustilat

Puhtaustilat, often translated as cleanrooms, are highly controlled environments designed to minimize contamination from particles like dust, airborne microbes, and other aerosols. These spaces are essential in industries where even the smallest contaminant can compromise product quality or research integrity. The level of cleanliness in a puhtaustila is defined by strict standards, such as ISO 14644, which categorizes them into different classes based on the maximum allowable number of particles of a specified size per cubic meter of air.

The design of a puhtaustila involves specialized construction techniques and materials. Surfaces are typically smooth, non-shedding, and easy to clean. Airflow is a critical element, usually maintained through a unidirectional or mixed flow system that removes particles from the space. High-efficiency particulate air (HEPA) or ultra-low penetration air (ULPA) filters are used to purify the incoming and recirculating air.

Personnel working in puhtaustilat must adhere to rigorous protocols, including wearing specialized garments called cleanroom suits, gloves, and masks. These garments are designed to prevent shedding of skin particles and fibers. Entry and exit procedures are carefully managed to maintain the controlled atmosphere.

Applications for puhtaustilat are diverse, ranging from semiconductor manufacturing and pharmaceutical production to medical device assembly, biotechnology research, and even food processing. The specific requirements for a puhtaustila vary significantly depending on the industry and the sensitivity of the processes being carried out within it. Maintaining the integrity of a puhtaustila requires continuous monitoring of environmental parameters such as particle counts, temperature, humidity, and pressure differentials.