What is the high stage suction pressure measured at?

The high stage suction pressure in a refrigeration system typically refers to the pressure at which the refrigerant is vaporized before entering the compressor in the high stage of a two-stage or multi-stage system. This pressure is critical for the efficient operation and capacity of the refrigeration system.

In many applications, the high stage suction pressure is designed to be significantly higher than the low stage suction pressure to ensure effective heat exchange and proper refrigerant flow through the evaporators and compressors. A pressure of 31 PSIG aligns with common operational parameters for high-stage suction pressures in various industrial refrigeration systems, suggesting it is optimal for maximizing efficiency and maintaining performance according to system design specifications.

In contrast, other pressures listed, whether lower or higher, may not reflect standard operating conditions for high stage suction in typical industrial refrigeration setups. For instance, options representing pressures significantly lower than 31 PSIG may not provide adequate performance, while those significantly higher could indicate over-pressurization or a non-optimal state for refrigerant vaporization in the high side of the system.