Diverter valves

A diverter valve provided at a three-way junction between an inlet passageway and first and second outlet branches therefrom and through which junction passes a high temperature gas, the valve having a closure member pivotable between a first position wherein it closes said first outlet branch of the junction while leaving said second outlet branch open and a second position wherein it closes said second outlet branch of the junction while leaving said first outlet branch open;

• wherein the improvement comprises that:
• said closure member at one side thereof carries one or more deflecting vanes, said deflecting vane or vanes being located with respect to said closure member (a) such that when the latter closes said second outlet branch, said vane or vanes is or are positioned in front of said closure member so as to serve to direct the flow of said gas from said inlet passageway into and through said first outlet branch, and (b) such that when said closure member closes said first outlet branch, said vane or vanes is or are positioned behind said closure member so as to remain entirely out of contact with the gas flowing from said inlet passageway into and through said second outlet branch.