A retrofit coke oven door seal (40) to replace existing coke oven door seals that have become ineffective due to normal use. The retrofit coke oven door seal (40) includes a leaf spring (62) and seal arrangement (56) and a unique mounting structure (52) to enable the existing seal on a coke oven door (44) to be easily removed and replaced by the present invention without modification or alteration to the door body or the existing refractories thus making improvements (in emission control) on existing doors by using a relatively simple structure which is cost effective. The retrofit seal (40) for coke oven doors (44) includes a mounting structure (52) attached to the periphery of the diaphragm plate (42) normally provided on a coke oven door together with fastening devices (64) securing a leaf spring (62) and seal assembly (56) in a manner to enable easy removal and replacement thereof if necessary. The leaf spring and seal assembly includes an angled seal strip (56) of metallic construction and a leaf spring (62) engaging the outer inclined surface thereof to provide a constant sealing pressure to urge the seal strip (56) against the door jamb surface (50) with the angle of the seal strip (56) providing for elevational flexibility with the angled portion (58) of the seal strip (56) enabling the seal strip (56) to conform with the jamb surface which it engages without requiring the seal strip to maintain any of its original axial planes.
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