1.5 TR, 5 TR, 20 TR, 30 TR & 50 TR. Air Cooled Chillers have stainless steel body frame which is surface coated with heat resistant paint to give seamless finishing.Feb 4th, 2021 10:44 AMShare this on :Keywordssurface20 TRstainless steel body frame50 TR30 TRheat resistant paint5 TRgive seamless finishingAir