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Check Valve 50mm is a butterfly check valve connected to the pipeline, which can prevent the backflow of the medium and the change of the pipeline pressure. The 50 mm check valve is light, compact, and easy to install, and is suitable for flow control of liquid, gas, and corrosive media and prevention of backflow. Its valves are made of cast iron, cast steel, stainless steel, etc., and adopt soft sealing structure, which has good sealing performance and is easy to switch.
| ANSI Class 150lb | ANSI Class 300lb | ANSI Class 600lb | ANSI Class 900lb | ANSI Class 1500lb | ANSI Class 2500lb | |
| NPS | 2 | 2 | 2 | 2 | 2 | 2 |
| (RF/BW)L/L1 | 203 | 267 | 292 | 368 | 368 | 451 |
| (RTJ)L2 | 216 | 283 | 295 | 371 | 371 | 454 |
| (OPEN)H | 152 | 152 | 190 | 240 | 240 | 275 |
| (d) | 50 | 50 | 50 | 47 | 47 | 38 |
