In surface condensers there is no blending of fumes steam and cooling water. The condensate can be re-utilized in the kettle: In surface condenser even unclean water can be utilized for cooling reason though in fly condensers cooling water must be unadulterated. Despite the fact that the capital cost and the space required is more in surface condensers however it is as yet favored because of its low running expense and high warm productivity of plant.
Surface condensers can be grouped into changes composes relying on the situation of condensate extraction pump, stream of condensate and course of action of tubes.
The condensate can be used as boiler feed water.
Cooling water of impure quality can be used because the cooling water does not come in contact with steam.