石油、天然气工业用螺柱连接阀盖的钢制闸阀 闸板的磨损余量
| 公称尺寸 DN |
磨损余量/mm |
| 25~50 |
≥2.3 |
| 65~150 |
≥3.3 |
| 200~300 |
≥6.4 |
| 350~450 |
≥9.7 |
| 500~600 |
≥12.7 |
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