What is the primary function of a steam trap in a two-pipe steam radiator system?

The primary function of a steam trap in a two-pipe steam radiator system is to allow for condensate to drain from the system. Steam traps play a critical role in ensuring the efficient operation of steam heating systems. As steam travels through the radiators, it gives up heat and condenses back into water (condensate). The steam trap is designed to release this condensate while preventing the escape of steam.

By allowing the condensate to exit the system, the steam trap helps maintain proper system pressure and efficiency. If the condensate remains in the system, it can cause issues such as water hammer, reduced heating efficiency, and potential damage to the system components. Therefore, the effective management of condensate through the steam trap is crucial for optimal heating performance and longevity of the heating system.