Ball and Seat Set for Type 21 ball valves (DN15-100) and Type 21a ball valves (DN15-50). Each set contains 2 balls and 2 seats. Nominal sizes DN15 to DN100; part numbers by Ball PVC-U, PVC-C, PP, PVDF; Seat PTFE.
| Type | Ball and Seat Set |
| Applicable Valves | Type 21 ball valves (DN15-100) and Type 21a ball valves (DN15-50) |
| Contents per Set | Each set contains 2 balls and 2 seats |
| Size | DN 15, 20, 25, 32, 40, 50, 65, 80, 100 |
| Ball Material | PVC-U, PVC-C, PP, PVDF |
| Seat Material | PTFE |
| Part Numbers (Ball PVC-U, Seat PTFE) | DN15 S2ABSU015 / DN20 S2ABSU020 / DN25 S2ABSU025 / DN32 S2ABSU032 / DN40 S2ABSU040 / DN50 S2ABSU050 / DN65 S21BSU065 / DN80 S21BSU080 / DN100 S21BSU100 |
| Part Numbers (Ball PVC-C, Seat PTFE) | DN15 S2ABSC015 / DN20 S2ABSC020 / DN25 S2ABSC025 / DN32 S2ABSC032 / DN40 S2ABSC040 / DN50 S2ABSC050 / DN65 S21BSC065 / DN80 S21BSC080 / DN100 S21BSC100 |
| Part Numbers (Ball PP, Seat PTFE) | DN15 S21BSP015 / DN20 S21BSP020 / DN25 S21BSP025 / DN32 S21BSP032 / DN40 S21BSP040 / DN50 S21BSP050 / DN65 S21BSP065 / DN80 S21BSP080 / DN100 S21BSP100 |
| Part Numbers (Ball PVDF, Seat PTFE) | DN15 S21BSF015 / DN20 S21BSF020 / DN25 S21BSF025 / DN32 S21BSF032 / DN40 S21BSF040 / DN50 S21BSF050 / DN65 S21BSF065 / DN80 S21BSF080 / DN100 S21BSF100 |