ELGi Screw Compressor Oil Cooler (often referred to as a Combi Cooler) is a critical heat-exchange component engineered to regulate the temperature of both the lubricant and the compressed air in EN, EG, and Global series compressors. Manufactured from high-grade aluminum alloy with a vacuum-brazed plate-and-fin construction, this radiator-type cooler is designed to dissipate the massive thermal energy generated during the compression cycle. By maintaining the oil temperature within the optimal range (typically $80^\circ\text{C}–90^\circ\text{C}$), it prevents the thermal breakdown of Airlube fluids, protects the precision $\eta$-V profile rotors from expansion-related scoring, and ensures the machine operates reliably even in high-ambient environments up to 50°C.