Transformer Valves are particularly made for transformer pipelines to control oil at a raised temperature. The product can withstand severe weather conditions and very cold dropping to sub-zero levels. There are various choices with the end connections of these valves. These are employed in pipelines of reactor fittings or oil-immersed power transformers. These enable a substitution of components without the demand of obviating any insulating liquid. The main benefit of these valves are their compactness and cost-efficient structure. The Transformer Valves enable the device to be disconnected from the circuit without reducing the oil level below that of the structures themselves. Provided valves come with structural uniformity as well as stability in operation.