Reliable shut-off in high-pressure steam systems makes very high demands on design and material. With the new models of the ZK 29, GESTRA now also offers a solution in the pressure rating Class 900/PN160 that is designed in accordance with ASME B16.34 and manufactured in overall lengths to both EN and ISA.The key benefits offered by the entire ZK series of control valves are of course also achieved by these new models:Particularly well suited for use as leak-off control, level control or injection control valves, and also for drainage and warm-up and as steam control valves.Long service times, even with frequent start-up and shut-down cycles – the special new features of the sealing surface provide for extreme wear resistance.Leakage rates that are well below average. The ZK series achieves leakage rates according to FCI70-2-2003, Class VI / EN 12266-1, leakage rate A.