What is the main function of a steam trap in a condensate return system?

The main function of a steam trap in a condensate return system is to allow condensate to pass while preventing steam escape. Steam traps are critical components in systems that use steam for heating processes. They work by closing automatically when steam is present and opening to let condensate (the water produced when steam cools down) drain out. This process helps maintain system efficiency and ensures that only condensate and non-condensable gases are removed from the system.

If condensate is not effectively drained, it can lead to water hammer, reduced heating efficiency, and potential equipment damage. The design of steam traps is crucial; they need to differentiate between steam (which should remain in the system to transfer heat) and condensate (which should be released). This functionality helps maintain the right balance in the system, allowing for optimal performance and energy savings.