The ELGi Screw Compressor Thermal Valve (also known as a Thermostatic Valve) is a critical temperature-control component designed to regulate the flow of lubricating oil between the compressor air-end and the combi cooler. By utilizing a high-precision wax-element actuator, the valve ensures the oil reaches its optimal operating temperature quickly during startup to prevent moisture condensation and "milky" oil. Once the oil warms up, the valve progressively opens to divert the lubricant through the cooler, maintaining a stable temperature that protects the rotors and bearings from overheating. These genuine ELGi valves are essential for preventing "oil varnishing" and ensuring the long-term reliability of the EG and EN series compressors, especially in varying ambient conditions.