What is the function of the minimum pressure valve on a wet screw compressor?

The minimum pressure valve on a wet screw compressor primarily serves to help establish and maintain oil flow during the start-up phase of the compressor. Wet screw compressors rely on oil for lubrication, cooling, and sealing within the compression chamber. When the compressor starts, it's essential to ensure that oil is present and flowing to prevent damage to internal components and to ensure proper operation.

During start-up, if there is not enough pressure in the system, the minimum pressure valve opens to allow oil to circulate, ensuring adequate lubrication to the bearings and other moving parts. This function is crucial because it protects against wear and potential failure when the compressor begins to operate.

In contrast, regulating output pressure, minimizing pressure drop, and monitoring the lubrication system are important functions in the overall operation of a compressor but do not specifically pertain to the unique role of the minimum pressure valve, particularly during start-up conditions.