Steam Properties and Qualities: A Primer

By Jerry Timm

When the laws and characteristics of steam are respected, fewer operating problems occur and unnecessary costs are minimized.

Four Types of Steam

Steam is an invisible gas created by adding heat energy to water. It is liquid water changed to its gaseous state.

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What is Superheated Steam?

By Mike Sneary

Superheated steam occurs when heat energy is added to saturated steam that is not in contact with liquid. When the heat energy is added, the steam temperature is increased above the saturation temperature. Superheated steam is referred to as ‘dry’ steam meaning it contains no water droplets. This effect can also occur when the pressure of saturated steam is reduced through a pressure control valve.

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