HygroMatik DDS20, Manual

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Page 15
9. Steam Lances
In t he steam lanc es (1) dry ste am is blown out of specially
formed nozzles (2) . They are designed for low n oise steam
emission. The nozzles t ake steam from the driest area in the
steam lance centre.
In order to prevent accumulated condensate or aerosol droplets
from being tran sported with the steam, the steam la nces are
provided with a steam lance heating system (3) . Due to t his
system such droplets either evaporate or cannot form in the first
place.
The steam lance heating system can be fed by the separator or
from a separate steam reservoir.
Note: S team pressur es of 1 ba r or higher have a n optimum
heating effect on the steam lances. With less pressu re the pre-
heating and re-evaporation times may be lengthened.
Re-evaporation
In some cases condensate remains in the steam lances immedi-
ately following control valve closure. This condensate is evapo-
rated by the stea m lance heating syste m and exit s the steam
lances as pressureless steam. Re-evaporation of residua l con-
densate can take up to 20 minut es. The higher the steam pres-
sure the better is the pe rformance of the steam lance he ating
system and the shorter the evaporation time.
Steam Lances
Inside thread M10
casting rustfree steel casting BS 3146/1.4550
Heating pipe Stainless steel 1.4404/1.4306
Main pipe Stainless steel 1.4306
Sealing cap Stainless steel 1.4306
Clip Stainless steel 1.4435
Nozzle Stainless steel 1.4301