OL Series is the ideal reciprocating oil-less air compressor for applications where critical air quality is required such as food and beverage, medical, chemical processing, pharmaceutical, electronics, and more. STANDARD FEATURES Cast iron crankcase (dry air chamber) Sealed pre-greased bearings Aluminum pistons Self-lubricated guide rings and compression rings Dynamically balanced ductile iron crankshaft Cast aluminum high tensile strength connecting rod Air cooled inter-cooler Balanced flywheel Intake filter with silencer