What type of valve is used on gas and oil-fired boilers?

The preferred valve type for gas and oil-fired boilers is the globe valve. This is primarily because globe valves are designed for precise flow control. They allow for throttling, which is essential in applications where maintaining specific flow rates is necessary for the safe operation of a boiler.

In the context of gas and oil-fired boilers, globe valves can effectively manage the fuel supply pressure and flow, ensuring that the boiler operates efficiently and safely within its required parameters. They provide a good seal, minimizing the risk of leaks, which is especially crucial when dealing with gases and flammable oils.

Other valve types may not offer the same level of control or sealing ability required for boiler applications. For instance, while ball valves are excellent for open/close service due to their quick operation, they aren't as effective at regulating flow as globe valves. Gate valves are generally used for on/off service with low-pressure drops, and check valves are primarily designed to prevent backflow rather than control flow. Thus, globe valves are the optimal choice for maintaining the necessary operational efficiency and safety in gas and oil-fired boilers.