Isolating the pump on the suction side is accomplished with which valve type?

Isolating the pump on the suction side is accomplished with which valve type?

• A. Globe valve
• B. Gate valve
• C. Ball valve
• D. Check valve

Answer: (B)

Isolating a pump on the suction side needs a valve that can be fully closed to stop flow and opened with minimal resistance when the pump is running. A gate valve fits this best: when fully open it provides a straight, unobstructed bore so the suction flow encounters little friction, and when closed it seals tightly against its seats to give a positive shut-off. This makes maintenance safe without compromising the suction line’s integrity. Globe valves are designed more for throttling and introduce more flow resistance, making them less ideal for simple isolation. Ball valves do provide good shut-off, but on large suction lines they’re less common for long-term isolation in distribution systems. Check valves prevent backflow but don’t offer a true isolation point for maintenance.

Isolating a pump on the suction side needs a valve that can be fully closed to stop flow and opened with minimal resistance when the pump is running. A gate valve fits this best: when fully open it provides a straight, unobstructed bore so the suction flow encounters little friction, and when closed it seals tightly against its seats to give a positive shut-off. This makes maintenance safe without compromising the suction line’s integrity.

Globe valves are designed more for throttling and introduce more flow resistance, making them less ideal for simple isolation. Ball valves do provide good shut-off, but on large suction lines they’re less common for long-term isolation in distribution systems. Check valves prevent backflow but don’t offer a true isolation point for maintenance.