A steam separator sometimes called a moisture separator or a steam drier, is a device used to separate the moisture from the steam in a watertube boiler steam drum. Without the steam separators, ‘wet’ steam would be released from the watertube boiler and create a multitude of problems during boiler operation and the following equipment, including decreased productivity and efficiency and increased erosion and corrosion rates. Because of this, steam separators are critical to a watertube boiler’s proper operation.