Radiator Butterfly valves for transformers are used oil filled transformers or Oil pipelines.Oil filled transformers have radiators for heat exchange in oil cooled transformers and Radiator valves are used in between transformer and radiators.When the radiators need to be serviced or replaced the radiator valves are closed thus stopping the oil flow from the transformer main oil tank enabling servicing or replacement of radiator without the problem of removing the entire insulating oil. Radiator Butterfly valves are also used in oil pipelines and are very effective during replacement of oil pipelines.Radiator Butterfly Valves are provided with a Butterfly Flap which is operated to open and close the valve.