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(0)F28B:0/0:

IPC6

SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING

STEAM OR VAPOUR CONDENSERS

F28B

1/1

F 28

HEAT EXCHANGE IN GENERAL (arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F 24 F 13/30)

Notes

(1)	In this class, the following expressions are used with the meanings indicated:

-	"heat exchange" means the heating or cooling of a fluid or fluent solid by direct or indirect contact with a heated or cooled fluid or fluent solid;

-	"heat transfer" means the heating or cooling of a fluid or fluent solid by direct contact with a heated or cooled surface or body.

(2)

Apparatus using heat exchange or heat transfer (as defined in Note (1) above) for specific purposes is classified either in subclass F 28 B or in the appropriate subclasses of, for example, classes F 22, F 24, F 25, F 26, or F 27; if no such other subclass is appropriate, such apparatus is classified in subclass F 28 C or F 28 D.

F 28 B

STEAM OR VAPOUR CONDENSERS (condensation of vapours B 01 D 5/00; condensation during pretreatment of gases prior to electrostatic precipitation of dispersed particles B 03 C 3/014; steam engine plants having condensers F 01 K; liquefaction of gases F 25 J; details of heat-exchange or heat-transfer arrangements of general application F 28 F)

Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser

using water or other liquid as the cooling medium

employing moving walls

using air or other gas as the cooling medium

employing moving walls [3]

Condensers in which the steam or vapour comes into direct contact with the cooling medium

by providing a flowing coating of cooling liquid on the condensing surface

by injecting cooling liquid into the steam or vapour (F 28 B 3/08 takes precedence)

by injecting the steam or vapour into the cooling liquid (F 28 B 3/08 takes precedence)

with rotatable members

Condensers employing a combination of the methods covered by groups F 28 B 1/00 and F 28 B 3/00; Other condensers

Combinations of two or more condensers, e.g. provision of reserve condenser

Auxiliary systems, arrangements, or devices

for feeding steam or vapour to condensers

for feeding, collecting, and storing cooling water or other cooling liquid

with provision for re-cooling the cooling water or other cooling liquid

for collecting and removing condensate

for extracting, cooling, and removing non-condensable gases

Controlling arrangements with features specially adapted for condensers (control arrangements in general G 05)