What is the purpose of a siphon in a boiler system?

The purpose of a siphon in a boiler system is to develop and maintain a water seal. This water seal is crucial because it prevents steam and gases from escaping the boiler system while allowing for the necessary flow of water. The siphon relies on the principle of siphoning to create a barrier, ensuring that the water level remains stable and that there is no direct communication between the steam space and the atmosphere. This is critical for maintaining safe operating conditions within the boiler.

In systems where a siphon is employed, the design ensures that any steam produced does not come into direct contact with measuring instruments or components that could be damaged by high temperatures or pressure. By keeping these components sealed off, the siphon significantly contributes to the efficiency and safety of the boiler operation.