数据参数：公称口径DN(mm)1520253240流量计长度（mm）165195225367380带接管长度(mm)259299345495508表接口螺纹G3/4BG1BG11/4BG11/2BG2B接管螺纹R1/,2R3/4R1R11/4R11/2常用流量qp(m3/h)1.52.53.5610***大流量qs(m3/h)3571220***小流量qi(m3/h)0.030.050.070.120.2)