For oil suction line testing, what vacuum pressure is required?

In the context of oil suction line testing, a vacuum pressure of 20 inches of mercury is required to ensure that the suction line is properly sealed and leaks are detected. This level of vacuum helps verify that the system can adequately draw oil without any air infiltration, which is essential for optimal performance. A sufficient vacuum pressure indicates that the system will function effectively, maintaining the necessary flow of oil to lubricate and cool the compressor components. Lower vacuum pressures might not adequately reveal leaks, while higher pressures may not be practical or necessary for this type of testing. Thus, a requirement of 20 inches strikes a balance between thoroughness in leak detection and operational feasibility.