New York Low Pressure Boiler COF Practice

What type of valves should be locked and sealed open on a water-jacketed boiler furnace mouth?

1. Straight way type

2. Angle type

3. Ball type

4. Check type

The correct answer is: Straight way type

On a water-jacketed boiler furnace mouth, straight way type valves should be locked and sealed open to ensure that there is an unobstructed flow of water, which is essential for effective heat transfer and cooling of the furnace. This type of valve features a simple design that allows water to flow straight through without any turbulence, which can be beneficial for maintaining consistent water flow rates necessary for cooling. Locking and sealing these valves open prevents unauthorized adjustments that could compromise the system's efficiency or safety. Ensuring that they remain open also guarantees that the water supply necessary for the cooling function is uninterrupted, helping to maintain safe operating temperatures within the boiler. Other valve types, such as angle type, ball type, and check type, have specific applications and are not suited for the same purpose in this scenario. Angle type valves might cause pressure drops due to their configuration, while ball valves may not provide the same level of reliability for maintaining a steady water flow when left in a fully open position. Check valves, on the other hand, are designed to prevent backflow rather than control flow direction and volume, making them inappropriate for locking open in this context.