Check Valves with pressure relief (-PR)
| bore diameter | 14.4 | 14.1 | 15.1 | 15.1 | 15.1 | 15.1 | 20.1 | 20.1 | 20.1 |
| part number | 30.4032.0 | 30.4037.0 | 30.4094.0 | 31.0068.0 | 31.0070.0 | 31.0069.0 | 31.0071.0 | 31.0072.0 | 31.4289.0 |
| description | DW14/ DN10 -PR | DW14/ DN10AF-PR | DW15/ DN10-PR | NV15/ DN15-PR | OV15/ DN15-PR | OF15/ DN15-PR | NV20/ DN20-PR | OV20/ DN20-PR | OF20/ DN20-PR |
| double CV possible | no | no | no | no | no | no | no | no | no |
| length (mm) | 16 | 16 | 16 | 14.9 | 16 | 16 | 20.3 | 22.3 | 22.3 |
| DN | 10 | 10 | 10 | 15 | 15 | 15 | 20 | 20 | 20 |