公称直径: 50mm≤DN≤1200mm ,超过1200mm需标定·粗铸收缩段:100mm≤DN≤800mm·机械加工收缩段:50mm≤DN≤250mm·粗焊铁板收缩段:200mm≤DN≤1200mm节流孔径比β:0.3≤β≤0.75·粗铸收缩段:0.3≤β≤0.75·机械加工收缩段:0.4≤β≤0.75·粗焊铁板收缩段:0.4≤β≤0.7雷诺数范围: 2×105≤ReD≤2×106·粗铸收缩段:2×105≤ReD≤2×106·机械加工收缩段:2×105≤ReD≤106·粗焊铁板收缩段:2×105≤ReD≤2×106精度等级:1级
