Before performing system maintenance, should all valves be worked in all positions?

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Working all valves in all positions before performing system maintenance is essential for several reasons. This practice helps ensure that the system is completely depressurized and that fluid does not unintentionally escape during maintenance tasks, which can lead to safety hazards and system damage.

When all valves are exercised—meaning they are opened and closed—it not only verifies their functionality but also prevents them from seizing due to prolonged inactivity. This is crucial because if a valve is left in one position for a long time, it may become difficult or impossible to operate when needed, especially in urgent situations.

Moreover, by cycling the valves, you can also detect any leaks or malfunctions that might not be apparent when the system is inactive. Thus, this proactive measure increases overall safety for maintenance personnel and helps maintain the integrity of the system, facilitating smoother and safer maintenance operations.

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