What is the minimum pump discharge pressure differential that should be maintained?

Maintaining a minimum pump discharge pressure differential is crucial for ensuring the efficient operation and reliability of refrigeration systems. A pressure differential of 22 PSID is often recommended because it provides a balance between adequate flow and maintaining the integrity of the system.

This level of differential pressure helps to ensure that the refrigerant is effectively circulated throughout the system, overcoming any pressure drops that might occur due to fittings, valves, and other restrictions in the piping. If the pressure differential is too low, it can lead to inadequate refrigerant flow, which can cause inefficiencies, increased wear on the pump, and potential damage to the system components.

In many industrial applications, a discharge pressure differential of at least 22 PSID is established to ensure optimal performance and to safeguard the system against issues that might arise from inadequate flow rates. Thus, this choice aligns with standard best practices in the context of industrial refrigeration operations.