Diffusers, Chambers & Casings
Top diffuser
Diffuser (guide vane) for CNP pumps, used in 5 CNP series and listed in Stainless steel.
- Ø D outside diameter
- Ø d bore
- H height (axial)
What it is
The fixed guide-vane ring that follows each impeller in a multistage pump.
How it works
Its channels slow the fast liquid leaving the impeller and turn the speed into pressure, then guide it into the next stage.
- Part group
- Diffusers, Chambers & Casings
- Used in
- 5 CNP series
- Materials
- Stainless steel
- Standard
- AISI304
- Supply
- Quoted per pump model
Signs it needs replacing
- Falling pressure at the same flow
- Eroded or cracked vanes
- Increased noise
Selection & fitting tips
- Replace diffusers together with the matching impellers
- Stainless steel pressed or cast versions are not interchangeable
- Check the stage position (first, support, top, last)
What to send us to order
Pump model code, number of stages, position of the diffuser, quantity.
We identify the exact part for your pump and reply with price and delivery.
Request a quotationSeries that use the top diffuser
| Series | Listed as | Material | Standard | Fits sizes | |
|---|---|---|---|---|---|
| CDL / CDLF | Top diffuser | Stainless steel | AISI304 | CDL1, CDL2, CDL3, CDL4, CDL8, CDL10 +7 | |
| CDM / CDMF | Top diffuser | Stainless steel | AISI304 | CDM1, CDM3, CDM5, CDM10, CDM15, CDM20 +4 | |
| LDMF (hot water) | Top diffuser | Stainless steel | AISI304 | All sizes | |
| CDLF + CDH | Top diffuser | Stainless steel | AISI304 | All sizes | |
| CHM | Top diffuser | Stainless steel | AISI304 | CHM1, CHM3, CHM5 |
Related parts
Impeller25 series
Chamber1 series
Support diffuser10 series
Casing4 series
Casing cover1 series
Cylinder5 series
Diffuser14 series
Discharge chamber1 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.