Shafts, Sleeves & Bearings
Neck ring
Ring / seat for CNP pumps, used in 2 CNP series and listed in PBT/NBR.
- Ø D outside diameter
- Ø d inside (bore) diameter
- t thickness / width
What it is
A precision ring that seats a seal, closes the clearance at the impeller or spaces components in the pump.
How it works
It holds a seal or keeps the running clearance between rotating and fixed parts small so less liquid recirculates and efficiency stays high.
- Part group
- Shafts, Sleeves & Bearings
- Used in
- 2 CNP series
- Materials
- PBT/NBR
- Supply
- Quoted per pump model
Signs it needs replacing
- Falling flow or pressure as clearances open up
- Scoring or grooves on the ring
- Leakage past the seat
Selection & fitting tips
- Replace wear rings when clearance has doubled
- Match material to the liquid (stainless steel, cast iron, PBT/NBR)
- Fit square and press evenly
What to send us to order
Pump model code and stage/position, quantity.
We identify the exact part for your pump and reply with price and delivery.
Request a quotationSeries that use the neck ring
| Series | Listed as | Material | Standard | Fits sizes | |
|---|---|---|---|---|---|
| PQ (submersible multistage) | Neck ring | PBT/NBR | — | All sizes | |
| SJ (deep-well submersible) | Neck ring | PBT/NBR | — | All sizes |
Related parts
Bearing9 series
Bearing body2 series
Bearing cover1 series
Bottom bearing4 series
Connecting sleeve3 series
Exchange chamber bearing1 series
Intermediate bearing3 series
Main shaft1 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.