VALVE SEAMING ON EXPANSION VESSELS DOMES The valve seaming process is integrated into the circumferential vessel welding plant. Capacitive discharge resistance welding technology. Robotic machine enslavement system. Two process branches: AIR SIDE o Hole Verification Stations in Laser Technology o Automatic Valve Crimping Station o Valve leak testing station WATER SIDE o Hole Verification Station o Automatic welding station for fitting on cap o Welded fitting leak testing station Main benefits: massive energy saving (in region of …%) compared to traditional welding system and reduction of installed power (from 1000 Amp to 32 Amp)