Welded filter casing from galvanized steel with strong double chamfered connecting flange, available with or without pre-filter section. Casing surfaces with decontaminable powder coating RAL 9002 or RAL 7001.

The access opening in the filter housing is tightly sealed by a cover plate with channel seal and star knob clamping screws for easy servicing. Where the housing is fitted with double-groove service board for contamination-free filter change, the cover plate also holds the plastic service bag. Effective operational safety is provided as the cover plate can only be replaced and firmly sealed when the clamping device is closed and the filter cell correctly positioned.