Air Pump and Hot Well
These two pumps form part of the engines condensate
circuit and are connected to the engine piston rod, at the point between the
low pressure cylinder and the ram pumps.
The water, or condensate, is drawn out of the
condenser by the Edwards air pump, pictured,
into the hot well. From here the hot well pump delivers it to the boiler
feed pump room. The condensate
then passes through an oil separator and into the feed water tank.
Separately driven steam boiler feed
pumps then pass the condensate through the
economiser and back into the boiler.