When should reciprocating pumps be started?

Reciprocating pumps should be started when the suction and discharge lines are open to ensure proper flow and prevent damage to the pump. This practice is crucial because if the pump is engaged without an open discharge line, it can lead to a dangerous condition known as "deadheading," where the pump builds up pressure without being able to move fluid. Mortal harm to the pump may occur as a result of overheating or excessively high pressures. Opening both lines allows for the movement of fluid and assists in maintaining the pump's operational efficiency. Additionally, it helps to prime the pump correctly by ensuring that it is filled with fluid before starting, thereby minimizing cavitation and other startup issues.

Starting the pump when the tank is full could lead to overflow or undesirable operational issues, and waiting for the motor to reach full speed does not guarantee that the pump is primed and ready to function properly. Monitoring the pressure gauge can provide a point of reference for operational conditions but is not the initial step for safe pump engagement. Correct operation hinges on ensuring fluid pathways are clear and operational prior to activation.