On the housing with absolute filter AFV-8 (or AFV-8G) a shut-off damper ZL-2 is installed in the housing connection. The shut-off damper ZL-2 conforms to the DIN 1946/4 standard requirements.
Application and advantage:
The advantage of such combination of an Hepa filter housing and shut-off damper is the ability to close the shut-off damper during the filter exchange and thereby to prevent room air pollution. Upon the completion of the filter exchange, the shut-off damper is reopened. Such a filter exchange procedure elimintaes the need to disinfect the room, which is mandatory in the case of exchanging the filter without shutting-off the inlet of non-filtered air.
