Marine Cast Iron Single Arrangement Suction Stop Check Box Valve has R/RS, S/SS types. R/RS is with duplex stop check valves, S/SS is with triple stop check valves.
Design Standard:GB/T1855-93
Test Standard:GB600
Flange as per GB569 or GB2501
| Nominal Pressure (Mpa) | Nominal Diameter(mm) | Applicable Medium |
| 1.0 | 40/50--150/200 | sea water, fresh water |
| 0.6 | 200/250--250/300 |