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Steam System Valves: Function in Industrial Networks

Steam system valves are industrial flow-control devices used to isolate, regulate, and protect steam and condensate networks in power plants and process facilities. They operate under high temperature and pressure conditions, ensuring safe steam distribution, pressure control, condensate management, and equipment protection in accordance with ASME and industry standards.

Steam conditionValve material< 200 °C, < 16barCarbon steel,flanged gate200–400 °CCarbon steelwith Cr-Mo bolting400–550 °CCr-Mo alloysteel, graphite packing> 550 °CCr-Mo-V oraustenitic SS
Higher steam conditions demand progressively higher alloy content. Qualitative. Illustrative cross-section; not to scale.
Steam system valve duties (schematic)IsolationGate valve; fullbore, low ΔPControlGlobe valve;throttle steam flowNon-returnSwing check;prevents backflowSafetySafety relief;overpressure protection
Steam systems use multiple valve types matched to specific duties. Qualitative. Illustrative cross-section; not to scale.