F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04D—NON-POSITIVE-DISPLACEMENT PUMPS
F04D25/00—Pumping installations or systems
F04D25/02—Units comprising pumps and their driving means
F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
F04D25/14—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures and having shutters, e.g. automatically closed when not in use
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
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General Engineering & Computer Science
(AREA)
Structures Of Non-Positive Displacement Pumps
(AREA)
Dispositif electrique de chauffage d'au moins un fluide pour vehicule automobile et installation de chauffage, ventilation et/ou climatisation comportant ce meme dispositif
Procede de nettoyage des tubes de condenseurs de centrales d'energie, notamment de centrales electriques, et condenseur pour mettre en oeuvre ce procede