The flat form provides a free areal beneath the hood and prevents that air is extracted behind the hood. Delivered in connection with Gram extraction arms or as lose hood that can be mounted in the ends of hoses.
Extraction hood type ST can be equipped with:
Extraction hood type ST-S (with damper) can be supplied with micro-switch that gives a signal for start of fan or filter unit.
Extraction hoods in Gram extraction arm are delivered with damper ex Works. (Except however Hood to TGI-telescopic arm)
Gram hoods model ST are available in 4 versions:
Type ST (without damper):
ST-S (with damper):
ST-M with magnet
ST-MS with magnet and damper
Gram hoods type ST are made in black steel and thus powder enamelled in an elegang silver colour.