Cooling section with valves and pressure vessels for preventing pressure shocks

An apparatus for cooling metal stock rolled in a rolling mill, comprising:

• a plurality of coolant suppliers, each coolant supplier comprising,
• a cooling device;
• a spur conduit connected to the cooling device to supply water to the cooling device;
• a valve arranged in the spur conduit to set flow of the water therethrough, the valve having an angle of rotation of 90° between the valve's completely open position and completely closed position;
• a step motor that moves the valve from the completely open position to the completely closed position in less than 0.2 second;
• a feed conduit which supplies the water to the spur conduit;
• a dedicated pressure vessel;
• and
• a flow resistance conduit arranged between a connection position and the dedicated pressure vessel, the flow resistance conduit being set to provide a flow resistance,
• wherein the feed conduit, the spur conduit, and the flow resistance conduit are connected to the connection position,
• the spur conduit is arranged downstream of the connection position,
• the flow resistance conduit and the feed conduit are arranged upstream of the connection position,
• the flow resistance conduit is arranged downstream of the dedicated pressure vessel,
• the flow resistance conduit has a cross-section dimensioned to dampen oscillation in the water flow, and
• at least one of the coolant suppliers further comprises at least one more cooling device connected to the connection position of the at least one of the coolant suppliers via another valve.