30с41нж /cast steel gate valve
| 1 | Disc : | 2Cr13 |
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| 2 | Body: | WCB | Dn | L(mm) |
| 3 | seal: | graphite | 50 | 180 |
| 4 | bonnet: | WCB | 80 | 210 |
| 5 | stem packing | oily graphite | 100 | 230 |
| 6 | stem: | steel #45 | 150 | 280 |
| 7 | bracket: | WCB | 200 | 330 |
| 8 | hand wheel: | DI | 250 | 450 |
| 9 | bonnet packing: | DI | 300 | 500 |