There are a lot of sliding doors, available on the market. Yet, none of them was suitable for the grade B zone. Till now. The Cleangrad hermetic sliding doors C-HSD-ALU with the automation were developed in house, to perfectly comply with the GMP requirements in the B and C cleanroom zones. Either with aluminium, HPL or stainless steel finish, the hermetic sliding doors are suitable for all wall systems and are totaly flush with any kind of flooring. With no floor guides and no movable parts, but equiped with a guide rail with particle catchers and control unit in the technical area, they allow fast and easy maintenance, without interfering into cleanroom. To assure the level of safety the doors have been certified by the ZAG and SIQ Institutes.