The System is designed to control de flow velocity. The core of the System is a valve type XLC 380/480. To avoid problems resulting from pressure surge upon closure depending on the location, fluid velocity, differential pressure a VSM or VRCA pressure relief valve installed upstream is recommended, along with a pressure sustaining valve XLC 420 or VSM on the by-pass line for the maintenance operations. Anti-surge combination air valves FOX 3F AS are also needed for air control and water hammer protection during commissioning and pipe filling. We are providing all system components for a fast and reliable installation at the plant in accordance with the dimensions engineered by our technical department.