Plate check valve is an important blowout control tool. Compared with other structure back pressure valve, it has the advantages of high strength, large flow area, high temperature resistance, high pressure resistance, drilling fluid erosion resistance and easy maintenance, etc.
| Model | OD mm(imch) | ID mm(imch) | Connection API | Working Pressure MPa(psi) |
| FD159 | 159(6-1/4) | 65(2-9/16) | NC46 | 35～70 (5,000～10,000) |
| FD165 | 165(6-1/2) | 79.4(3-1/8) | NC50 | |
| FD178 | 178(7) | 88.9(3-1/2) | 5-1/2FH |