What are the key characteristics of Shell Diala transformer oil?

Shell Diala is a family of insulating oils used for dielectric strength and cooling in oil immersed equipment. Key characteristics typically include compliance with mineral insulating oil standards, controlled moisture and acidity limits, good oxidation stability, and suitable low temperature flow depending on grade. Always match the exact Diala product variant to the required standard and performance target, because different variants are formulated for different operating profiles and fire or environmental constraints.