Which types of valves are used to shut off or partially shut off the flow of fluid?

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Shutoff and partial flow control is the job of a stop valve. The name itself implies its purpose: it’s designed to isolate a line and, by turning the stem, also allow limited flow when you need to regulate it. The valve element (like a plug or disk) moves toward or away from its seat to create a seal or to open a small amount of passage, giving you reliable full shutoff or gradual throttling as needed.

Other valve types have different primary strengths. Ball valves are great for quick, full shutoff with minimal flow restriction but aren’t typically used for fine throttling. Gate valves work well for blocking flow with low resistance when fully open, but aren’t meant for precise flow control. Globe valves can throttle effectively, but the term stop valve specifically captures the idea of isolating flow and adjusting it in small steps, which is why it’s the best fit for the described use.