As I'm told. sometime around 2000, Flowserve was required to sell off some of their pump divisions due to some anti trust issues. Ruhrpumpen ended up with the line of API pumps as Poppeye says. We recieved a batch of pumps for a project in 2001 where it was obvious that the Flowserve nametags had been replaced with Ruhrpumpen tags. While the pumps are high quality API pumps, my experience with Ruhrpumpen service is another matter. In 2002, while attempting to get parts from Ruhrpumpen, it was obvious that they they did not have the systems in place to support these pumps. Haven't dealt with them since then. Don't know if they've fixed this or not.