Tight doors together with casing represent one of the basic elements to constuct clean workplaces and areas with maximum safety, sterility, hygiene, easy maintenance and sanitation in pressure-independent romms.

Tight doors are part of the system components of the installation for rooms with high demands on tightness. These rooms are demandingly tested for tightness of clean rooms as well as for tightness of air-conditioning, especially on the exhaust from the rooms. All outputs from biohazardous areas must be secured against possible leakage of biologically active materials - gaseous, liquid and solid.

These critical systems for the customer must be secured during possible power outages and production downtime.