Today I went to the Church of the Martyrs in Leicester to attend to a door that was slamming with a floor spring that would not adjust (both closing speed and check had gone). As I have mentioned on many occasions, suppliers, architectural firms, manufacturers etc often put their own names on the decor plates as of this occasion. The floor spring I discovered beneath the decor plate was in fact a DORMA BTS 84, This floor spring is what I consider to be a transom closer but without the usual square pin, the pin on this model is oblong as can be seen.
The BTS 84 is considered by the industry to be a throw away unit as many of the modern floor springs and transom closers unfortunately are. This Dorma BTS 84 however will not be thrown away, nor skipped, it will not go into landfill and it will not be melted down it will be serviced and repaired. I will post a before and after video of the repaired Dorma BTS 84 in due course for those interested.
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