Boiler feedwater pump

Mechanical seals of boiler feedwater pumps often show signs of electrical corrosion.

Within short periods of operation – in some cases, only a few hundred operational hours – pieces having the size of fingertips break off from the sliding and/or the stationary ring and cause rapid increases in leakage current.

Diamond-coated (DLC) mechanical seals avoid this problem and extend durability remarkably.

A means had to be provided, of course, to put the initial charge of water into the boiler (before steam power was available to operate the steam-powered feedwater pump).

[2] An injector pump uses the Venturi effect and steam condensation to deliver water to a boiler.