The purpose of using stop valves and ball valves together in process pipelines

Both globe valves and ball valves have their specific purposes and application scenarios in process pipelines. Here are some of their main uses: **Globe Valve**: 1. **Flow regulation**: The design of the globe valve enables it to regulate flow effectively. The valve disc inside the valve body can be opened or closed to different degrees as needed, thereby allowing more or less fluid to pass through. 2. **Starting/Stopping the service**: Although the stop valve is not the most ideal device for full opening or closing, it can still provide such functionality when needed. 3. **Sealing performance**: Compared to ball valves, globe valves offer better sealing performance at low pressure differences and low temperatures. **Ball Valve: 1. **Full open/full closed operation**: Ball valves are designed to enable quick switching between fully open and fully closed states. This makes them very useful in applications where a complete shutdown or initiation of fluid flow is required. 2. **High-pressure resistance**: Ball valves can withstand high pressures, which is why they are commonly used in high-pressure systems. 3. **Sealing performance**: Ball valves offer better sealing performance under high pressure differences and high temperatures. Therefore, in process pipelines, globe valves and ball valves can be selected for use as needed. For example, globe valves may be used for precise flow control, while ball valves are used where rapid shutdown or initiation of fluid flow is required. When considering pressure, temperature, and the level of sealing required, one of these may also be chosen for use. .

For ordinary room-temperature media or organic solvents, globe valves have a regulating function, but their hard seals provide poor sealing performance; ball valves feature dual soft seals that offer good sealing performance but limited regulating capabilities

Thank you all. So it’s to ensure both regulation and sealing, right?