The rupture disc for a low-pressure centrifugal refrigeration machine is typically located on which component?

The rupture disc in a low-pressure centrifugal refrigeration machine is typically installed on the compressor suction. The purpose of the rupture disc is to act as a safety device that provides a path for the refrigerant to escape in case of an overpressure condition.

By placing the rupture disc on the suction side of the compressor, it ensures that any excessive pressure buildup that could potentially lead to damage is vented safely before it reaches the compressor. This placement is crucial because the suction line handles lower pressures compared to other components, allowing the disc to activate under conditions that could indicate a malfunction or failure in the system.

Typically, the other components listed operate under different pressure conditions. For example, the compressor discharge line deals with high pressure resulting from the compression of refrigerant gas, while the expansion valve is designed to reduce pressure and does not directly require protection from excessive pressures in the same manner. The condenser outlet, on the other hand, is where the refrigerant is condensed and also operates under relatively higher pressures. Thus, the correct placement of the rupture disc is vital for the safe operation of refrigeration machinery, ensuring the safety and integrity of the entire system.