What are the three general classes of steam traps?

The three general classes of steam traps are identified by their operational principles, which are mechanical, thermostatic, and thermodynamic.

Mechanical steam traps operate based on the physical movement of components, such as a mechanical float or ball, which opens and closes the trap in response to the presence of condensate. This allows condensate to drain while keeping steam contained.

Thermostatic steam traps function based on temperature differences. They utilize materials that expand and contract with temperature changes to open and close the trap. As steam condenses and cools, the trap opens to allow condensate to escape.

Thermodynamic steam traps exploit the differences in pressure between steam and condensate to function. They typically use a disc that moves in response to pressure changes, quickly closing when steam is present and opening to discharge condensate.

These classifications are fundamental in understanding the various types of steam traps used in systems, which helps in selecting the appropriate type based on specific operational requirements. The other options do not accurately represent the widely recognized categories of steam traps.