RV501 series electric/pneumatic control valves are suitable for the control of various liquids, gases and steam in industrial processes. This series of control valves meets the requirements of DIN and ANSI standards, and is a continuation of the RV200 series control valves, which are widely used in the fields of chemical industry, petrochemical industry, electric power, metallurgy, pharmacy, light industry and so on. RV501 series is especially suitable for the electric power industry: steam engine bypass control valve, boiler feedwater control valve, heater trap control valve, deaerator control valve, steam extraction system control valve. Nominal diameter: DN15~250 1/2″~10″. Pressure Rating: PN16 ~400 ANSI Class150~2500 Temperature range：-200℃~550℃ Kvs: 0.1-250m3/h

RV701 series electric/pneumatic control valves are suitable for the control of various liquids, gases and steam in industrial processes. This series of control valves meets the requirements of DIN and ANSI standards and is a continuation of RV200 series control valves, which are widely used in the fields of chemical industry, petrochemical industry, electric power, metallurgy, pharmaceutical industry, light industry, etc. The RV501 series is especially suitable for the electric power industry: Steam turbine bypass regulating valveBoiler feedwater regulating valveHeater trap regulating valveDe-oxidizer regulating valveValve for extractor systemRegulating valves with a nominal diameter DN15-250 1/ 2″-10″ Pressure Rating PN16 ~400 ANSI Class150-2500 Temperature Range -200℃-550℃ Kvs 0.1-250m3/h