metallurgical valve
| nominal diameter(dn)（mm） | dn200-dn1000 | dn700-dn4000 |
| workers said pressure (mpa) | ≤0.6 | ≤0.25 |
| work pressure（mpa） | ≤0.6 | ≤0.25 |
| test pressure | case | 1.5 times the working pressure |
| seal |
1.1 times the working pressure sealing rating |
|
| 密封等级 | aorb | |
| medium temperature (℃) | ≤500 | |
| applicable medium | air、gas、smoke |