Coating Reference Handbook - Hempel

HEMPEL
TANKS - VENTILATION R 14
SOLVENT VAPOURS ARE MORE HEAVY THAN AIR.
Therefore they always tend to go to the bottom of confined spaces
and consequently their removal must always take place by suction
from the lower part of such areas.
Control both Inlet Air and Exhaust Air
Exhaust by suction is the normal way - but to fully control the
ventilation flow, forced inlet blowing should always be used in
cooperation with the suction.
Forced inlet blowing is also necessary when controlling the
atmosphere in the confined space through dehumidifiers.
Sometimes general ventilation is not enough.
Local areas inside the confined space may not be sufficiently
ventilated via the general ventilation installation.
To secure ventilation of the local areas ex-proof portable
blowers can be put in these areas.
GENERAL
VENTILATION FLOW
VENTILATE BY
EXPROOF BLOWER
FORCED INLET
BLOWING AT TOP
EXHAUST SUCTION
AT BOTTOM
INSPR14 ed2 VALIDITY SUBJECT TO CONFIRMATION 30/04/97 EMi