There are some telltale symptoms of a seriously oversized rotary air compressor: • The compressor is an oily mess, • You have to buy extra oil between services, • You are having problems with your condensate drains, • You are frequently replacing downstream filters, or • You are experiencing corrosion in your compressed air system. If you suspect your rotary air compressor is oversized, ask Air Compressor Service to inspect your compressed air system and determine if changes are indicated. In order to ensure that our screw compressor operates as efficiently as possible, Jinjing has independently developed its own special rotor profile. Compared with other traditional rotor profile designs, Jinjing rotor can save up to 15% energy. Our precision machined large-size roller bearings help to make our air end have a long service life. All these, together with our state-of-the-art internal manufacturing processes and strict manufacturing tolerances, provide excellent quality synonymous with the Jinjing name. Jinjing adopts an international advanced frequency conversion module, a special motor with speed up and down characteristics, and a set of PID parameters especially suitable for screw compressors. The control software has been tested by hundreds of thousands of compressors, with simple parameter settings and a friendly man-machine interface. The cooling of the frequency converter is specially designed. In order to support the user to set the best working pressure, the filtering area of the filter element of the oil-gas separator is increased.