Which type of globe valve is the best for throttling and hard service?

The plug type valve is well-suited for throttling and hard service due to its design, which allows for effective regulation of flow. The plug valve features a cylindrical or tapered plug that can be rotated to control the flow area. This design offers a large flow area when fully open and allows for precise adjustments when throttling is necessary. Being able to restrict flow without significant pressure drop makes it ideal for applications that require fine control.

Additionally, plug valves are often utilized in tough service conditions, such as high pressure and temperature, as their robust construction can withstand harsh environments. The ability to handle slurries and other difficult media without a risk of clogging also contributes to their preference in demanding applications.

In contrast, other valve types, such as ball, conventional, and composition valves, may not offer the same level of control and durability under similar conditions. Ball valves, for instance, generally are better for on/off service rather than throttling due to their design, which allows for excellent sealing but can create turbulence when partially open. Conventional valves, on the other hand, may not provide the reliable flow control needed for precision work, and while composition valves have their own advantages, they may lack the ruggedness required in hard service situations.

Therefore, the