The key specifications of the Copper Tube-in-Tube Models Capacity 500 CFM Air Cooled are — Nominal Capacity: 500 cfm; Electrical Connection: Yes 415V/ 3ph, 50Hz; Air Connection: 2 BSP(F) In I Out; Rated Power(kW): 2.2. These specifications are based on the standard GEM Equipments design; always verify against your machine's requirement before use. GEM Equipments Pvt. Ltd., established in 1984 and ISO 9001:2015 certified, is one of India's leading manufacturers of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, based in Coimbatore, Tamil Nadu.