New York Low Pressure Boiler COF Practice

What ensures that the tube of a steam gauge is filled with water?

1. A siphon

2. A pressure valve

3. A float mechanism

4. A thermal expansion device

The correct answer is: A siphon

The siphon is a crucial component in ensuring that the tube of a steam gauge is filled with water. It serves to protect the gauge from high temperatures generated by steam. When steam enters the siphon, it condenses within the tube, creating a column of water that fills the gauge. This water column is essential for accurate pressure readings, as it dampens any fluctuations caused by the steam itself and provides a stable reference point for measurement. Additionally, the design of the siphon allows it to be installed in a way that creates a trap for condensate. This prevents steam from directly entering the gauge, which could lead to inaccurate readings or even damage. By maintaining a continuous column of water, the siphon maintains the integrity and reliability of the pressure measurements taken by the steam gauge, thereby ensuring safe and efficient operation of the boiler system.