Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any ‘hiccups’ (be sure to completely shut down the air compressor!). Check the isolation of the motor winding.
[pdf] According to screw compressor manufacturers, treatment is closing the ball valve to verify that the rated pressure can be attained and inspecting the air compressor component to prevent issues with that component constituting the treatment procedure.
[pdf] High efficiency oil-free compressor Air-end ● The first and second level materials are stainless steel； ● High rotary speed SKF bearing； ● Special coating，270℃ temperature resistance； ● Oil jacket cooling，No scaling or dew coagulation risk； ● High precision synchronous gear. Efficient suction system
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