The model 4-500 bench-top head from Arc Machines is a fully integrated tube weld head system with an available fixturing plate designed for high-production bench welding of short, stick-out fittings, tubes, tube-to-valve bodies and other similar assemblies. The company says the unit is suitable for cleanroom aseptic welding of components. The product can be used alone or with a variety of stands and blocks to support valves, regulators, tubing or other components during welding.

Arc Machines, Inc.; 818-896-9556;