Bar manifolds are machined and undergo stress relieving heat treatment after machining, they are assembled with automated processes and individually tested. A complete series of sizes, variants and accessories is available to control the single routes. They may also be purchased pre-mounted on standard brackets or lowered in delivery/return kits. A number of accessories allow the main system requirements to be fulfilled and to complement the manifold with all the components required for optimal operation of the system: ball valves, shut-off valves, air vent valves, charge-discharge cocks, by-pass valves, housing boxes and individual insulation.