液化气止回阀主要外型尺寸和连接尺寸: PN | DN | H | D | D1 | D2 | b | f | Z-φd | 2.5MPa 4.0MPa | 25 | 105 | 115 | 85 | 65 | 16 | 2 | 4-14 | 32 | 150 | 135 | 100 | 78 | 18 | 3 | 4-18 | 40 | 160 | 145 | 110 | 85 | 18 | 3 | 4-18 | 50 | 170 | 160 | 125 | 100 | 20 | 3 | 4-18 | 65 | 180 | 180 | 145 | 120 | 22 | 3 | 8-18 | 80 | 200 | 195 | 160 | 135 | 22 | 3 | 8-18 | 100 | 210 | 230 | 190 | 160 | 24 | 3 | 8-23 | 150 | 300 | 300 | 250 | 218 | 30 | 3 | 8-25 | 200 | 380 | 360 | 310 | 278 | 34 | 4 | 12-25 | |