What “four-in-one” includes

A SPERAN four-in-one package combines the screw compressor module, a refrigerated dryer, filtration, and an air receiver on one skid. Buyers get a shorter bill of materials and fewer site interfaces than buying each component separately.

This configuration is popular for painting, pneumatic automation, and turnkey workshop builds where drier, cleaner air matters.

Size by flow, pressure, and air quality

Start with required free air delivery at working pressure, then confirm dryer capacity matches compressor output in your climate. Filters protect the airend and improve downstream air quality; plan filter element replacement into your maintenance schedule.

Choose fixed speed when demand is flat; choose PM VFD (for example SBN-10PM4 / SBN-20PM4 class) when demand swings or energy cost is critical.

Installation and export checklist

Verify voltage/frequency, ambient temperature, ventilation, condensate drainage, and floor loading. For export, confirm packing (plywood), nameplate language, and spare-parts kits. SPERAN can provide production photos and inspection videos against agreed schedules.