Measuring airflow in pharmaceutical filling lines and sterilising tunnels

Application

• Pharmaceutical products are sterilely filled in special machines and plants. The hereby used containers (usually glas containers – vials), have to be cleaned and sterilised.
• After washing, the vials are led to a sterilising tunnel for sterilisation. They are transported with a special conveyance through a preheating zone to the heating zone of the hot air steriliser. Hot air is blown onto the vials to sterilise and depyrogenate them.
• In sterilising tunnels hot air flows through the so called HEPA-filter down into the heating zone. There, sterilising hot air with a very low flow velocity is blown down to the glas containers.
• Since it determines the process, flow velocity needs to be measured and monitored closely.