Pump Heads, Covers & Connections
Inlet
Connection / flange for CNP pumps, used in 1 CNP series and listed in Cast iron.
- DN nominal bore
- Ø D flange outside diameter
- Ø K bolt-circle diameter
- n×Ød2 number × diameter of bolt holes
What it is
The inlet (suction) or outlet (discharge) connection that joins the pump to the pipework.
How it works
A flange with a standard bolt pattern lets you couple to PN-rated pipework; threaded versions are used on small pumps.
- Part group
- Pump Heads, Covers & Connections
- Used in
- 1 CNP series
- Materials
- Cast iron
- Supply
- Quoted per pump model
Signs it needs replacing
- Leak at the flange
- Corrosion or damaged sealing face
- Misaligned bolt pattern
Selection & fitting tips
- Check DN and pressure class (PN) against your pipework
- Use a new gasket on every assembly
What to send us to order
Pump model code, which connection (inlet / outlet), quantity.
We identify the exact part for your pump and reply with price and delivery.
Request a quotationSeries that use the inlet
| Series | Listed as | Material | Standard | Fits sizes | |
|---|---|---|---|---|---|
| SP (self-priming sewage) | Inlet (SP-10) | Cast iron | — | All sizes |
Catalogue dimensions
NSC series - inlet flange dimensions (23 rows)
| DN | PN | Ø D | Ø K | n | Ø d2 | T |
|---|---|---|---|---|---|---|
| 125 | 16 | 250 | 210 | 8 | 19 | 26 |
| 150 | 16 | 285 | 240 | 8 | 23 | 26 |
| 200 | 16 | 340 | 295 | 12 | 23 | 30 |
| 250 | 16 | 405 | 355 | 12 | 28 | 32 |
| 250 | 25 | 425 | 370 | 12 | 31 | 36 |
| 300 | 16 | 460 | 410 | 12 | 28 | 32 |
| 300 | 40 | 515 | 450 | 16 | 34 | 50 |
| 350 | 16 | 520 | 470 | 16 | 28 | 36 |
| 400 | 16 | 580 | 525 | 16 | 31 | 38 |
| 400 | 25 | 620 | 550 | 16 | 37 | 48 |
| 450 | 10 | 615 | 565 | 20 | 28 | 32 |
| 500 | 10 | 670 | 620 | 20 | 28 | 34 |
| 500 | 16 | 715 | 650 | 20 | 34 | 42 |
| 500 | 25 | 730 | 660 | 20 | 37 | 52 |
| 500 | 25 | 730 | 660 | 20 | 36 | 56 |
| 500 | 40 | 755 | 670 | 20 | 42 | 64 |
| 600 | 10 | 780 | 725 | 20 | 31 | 36 |
| 600 | 16 | 840 | 770 | 20 | 37 | 48 |
| 700 | 10 | 895 | 840 | 24 | 31 | 40 |
| 700 | 16 | 910 | 840 | 24 | 36 | 54 |
| 700 | 25 | 960 | 875 | 24 | 43 | 60 |
| 800 | 10 | 1015 | 950 | 24 | 34 | 44 |
| 800 | 16 | 1015 | 950 | 24 | 34 | 44 |
DN nominal bore · PN pressure class · D outside diameter · K bolt circle · n bolts · d2 bolt hole · T thickness (mm).
SP series - flange dimensions (6 rows)
| DN | Ø D | Ø D1 | n | Ø d1 |
|---|---|---|---|---|
| 50 | 140 | 110 | 4 | 14 |
| 80 | 190 | 150 | 4 | 19 |
| 100 | 228.6 | 180 | 8 | 19 |
| 150 | 285 | 240 | 8 | 23 |
| 200 | 340 | 295 | 8 | 23 |
| 250 | 405 | 355 | 12 | 26 |
D outside diameter · D1 bolt circle · n bolts · d1 bolt hole (mm).
WLT series - flange dimensions (5 rows)
| DN (D1) | Ø D3 | Ø D2 | n | Ø d1 |
|---|---|---|---|---|
| 65 | 185 | 145 | 4 | 18 |
| 80 | 200 | 160 | 8 | 18 |
| 100 | 220 | 180 | 8 | 18 |
| 125 | 250 | 210 | 8 | 18 |
| 150 | 285 | 240 | 8 | 22 |
D3 outside diameter · D2 bolt circle · n bolts · d1 bolt hole (mm).
Related parts
Connection pipe1 series
Crossover flange1 series
Discharge4 series
Discharge head1 series
Discharge outlet1 series
End cover1 series
Flushing pipeline1 series
Infusion cover1 series
How to order. Send us the pump model code (from the nameplate) and the quantity. We identify the exact part for your pump and reply with price and delivery. Use the part finder if you only know the model.