Sierra Fixed Speed Oil Free Rotary Screw Air Compressor

End View of RotorsSurface preparation createsminute crevices in our rotorsthat tightly grip the UltraCoatcoating. The result is the mostdurable performance on themarket, lowering our customers’energy costs and increasingthe life of the airend in theirSIERRA compressor.Rotor SurfaceRotor CoatingSolving The Need ForBetter Oil-Free PerformanceThe challenge: to give our customers an oil-freerotary compressor that operates at peakperformance throughout its lifetime. After a greatdeal of research, Ingersoll-Rand found that inferiorrotor coatings wear away over time, leaving therotors unprotected and susceptible to impuritiesin the air and to the effects of temperaturevariation. Eventually, this leads to reducedperformance or even compressor failure.After two years of modification and testing,Ingersoll-Rand chose the coating that consistentlyoutperformed all others in adhesion and durabilitytests: UltraCoat. Now, we use UltraCoat toprotect every SIERRA airend.To help our customers get the best performance,we didn’t limit our improvements to the coating.We selected stainless steel and aluminum forthe piping linking the intercooler with the stainlesssteel second-stage rotors. Condensation createdin the cooling process could not corrode thesematerials, eliminating the possibility of rust formationand carry-through, further lengthening the life ofthe coating and rotors.% of Capacity100%95%90%85%80%75%0 500 1,000 2,000 4,000 8,000 16,000 32,000UltraCoat Protection andPerformanceThe first step to full UltraCoat protection is thesuperior surface preparation of our rotors andhousings. As the images on the left show, ourcomponent surface treatments allow for thetightest possible grip for the coating. In the nextstep, UltraCoat is applied using robotics forthe thinnest, most even coat available.Then therotors and housings are heat-cured to solidifythe bond between the coating and the rotor orhousing surface.Competitive CoatingHours of OperationSIERRA ® UltraCoat10% Energy SavingsThe UltraCoat AdvantageWhen compared with other coatings,UltraCoat is a clear winner. Our customersget near-100% capacity and lower energycosts over a longer airend life.67