The RBK 60 S is an extremely robust water-cooled weld head for a standard heat exchanger application up to an ID of 60 mm, modified to an ID of 99 mm or 120 mm. The head is pneumatically centred and is available with a rotating wire device and/or arc voltage control (AVC) as an option. The head can also be used with a pneumatic positioner instead of a balancer.