BendPak's Tri-Max air compressors are ASME certified and feature an extreme-duty, three-cylinder pump designed to operate at maximum efficiency under all loads. The 100-percent cast-iron Tri-Max Series pump employs simple splash lubrication for reliability and a W-3 deep-finned cylinder for 360-degree cooling. Tri-Max compressors have a lower operating temperature, which achieves maximum compressor efficiency with less moisture contamination.