Ductile cast iron High rangeability Butterfly valves (HRDJ Series) SERIES

Ductile cast iron High rangeability Butterfly valves (HRDJ Series)

Maximum service pressure1.0MPaService temperature range EPDM-20℃ to +120℃Continuous service temperature range0～+100℃Rangeability160:1Flow characteristicsEqual percentage flow characteristicsSearling featureTight shutoffFace to face dimensionsJIS B 2032 series number 46Coupling flangeJIS 5K/10K/16K/20K PartsMaterialBodyFCD450-10StemSUS630DiscA351 Gr. CF8 / SCS13ASeatEPDMO-ringEPDMBearingPOM(50A to 200A)PlugChromated ZDC2Bottom stemSUS403(50A to 100A)SUS420J2(250A to 300A) The HRDJ series has an excellent rangeability of 160: 1, enables multi-control of minute flow rate, and realizes tight shut when fully closed. Tight shut/high rangeability is realized by combining disc section for full-shutoff and disc section for low-opening control for the disc.Also, cavitation is suppressed by installing a pressure chamber to improve anti-noise multi-orifice.Installing a multi hall at the disc section for flow-opening control and the fin section realized flow volume characteristics close to ideal equal percent characteristics for flow volume control. The vulcanized bond seat is suitable for controlling high velocity fluid to reduce erosion due to jet flow.