Which of the following will not create a closed loop piping system?

Which of the following will not create a closed loop piping system?

• A. Pressure relief valve
• B. Closed gate valve
• C. Dual check
• D. Double check

Answer: (A)

A pressure relief valve is designed to open at a predetermined pressure to prevent overpressure in a system, thereby allowing fluid to escape or vent, which helps maintain safety and system integrity. When the pressure in the system rises to the set limit, the relief valve opens, thus breaking the continuity of the piping system. This action means that it does not create a closed loop, as it allows for fluid to leave the system. In comparison, a closed gate valve is meant to completely seal off flow in a pipe, thereby creating a closed system when in the closed position. Dual check and double check valves serve as backflow prevention devices that can also maintain a closed loop when they are properly functioning and installed correctly. Both of these devices prevent reverse flow and ensure that the system is sealed, thus contributing to a closed loop piping system.

A pressure relief valve is designed to open at a predetermined pressure to prevent overpressure in a system, thereby allowing fluid to escape or vent, which helps maintain safety and system integrity. When the pressure in the system rises to the set limit, the relief valve opens, thus breaking the continuity of the piping system. This action means that it does not create a closed loop, as it allows for fluid to leave the system.

In comparison, a closed gate valve is meant to completely seal off flow in a pipe, thereby creating a closed system when in the closed position. Dual check and double check valves serve as backflow prevention devices that can also maintain a closed loop when they are properly functioning and installed correctly. Both of these devices prevent reverse flow and ensure that the system is sealed, thus contributing to a closed loop piping system.