主要外形尺寸main outer size | dn | g | b | l | h | a | 15 | 1/2" | 15 | 95 | 68 | 125 | 20 | 3/4" | 20 | 105 | 70 | 125 | 25 | 1" | 25 | 115 | 80 | 145 | 32 | 1 1/4" | 32 | 125 | 84 | 145 | 40 | 1 1/2" | 38 | 135 | 93 | 205 | 50 | 2" | 50 | 150 | 100 | 205 | 65 | 2 1/2" | 64 | 190 | 142 | 250 | 80 | 3" | 76 | 220 | 155 | 250 | 100 | 4" | 100 | | | |
| 主要零件材料materials of main parts | 零件名称 desc-ription of parts | q51f-25,40 | q51f-25p,40p | q51f-25r,40r | 阀 体 valve body | wcb | zg1cr18ni9ti cf8 | zg1cr18ni12mo2ti cf8m | 球 体 ball body | 1cr18ni9ti 304 | 1cr18ni9ti 304 | 1cr18ni12mo2ti 316 | 阀 杆 valve stem | 1cr18ni9ti 304 | 1cr18ni9ti 304 | 1cr18ni12mo2ti 316 | 密 封 圈 seal ring | 聚四氟乙烯 polytetrafluoroethylene | 填 料 packing | 聚四氟乙烯 polytetrafluoroethylene |
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