BX43W-1.6C/BX44W-1.6C沥青专用阀型号公称压力PN（MPa）试验压力PS（MPa）适用介质工作温度（℃）壳体密封BX43W-1.6C1.62.01.6沥青及厚质油类≤425BX44W-1.6C1.62.01.6公称通径DN（mm）LDD1D2bFn-φdHS50二通2501601251001834-φ1825030×30三通2501601251001834-φ1865二通3001801451202034-φ1828040×40三通3001801451202034-φ1880二通3001951601352038-φ1832045×45三通3001951601352038-φ18100二通3252151801552238-φ1835052×52三通3252151801552238-φ18125二通3502452101852238-φ1840562×62三通350