These valves are designed for pressure drops as high as 200 bar.The Multistage Valve design integrates the advantages of a High Pressure Stop Valve Design and the Reliability of a High Pressure Reduction Valve. The Valve has a replaceable seat bush with stellite deposition at the seat. Slots in the seat bush and control plug are designed such that the spindle is guided throughout its travel by the seat bush eliminating the harmful effects of vibratio