NETZSCH NEMO SY Pumps
Spare Parts for NEMO SY Progressive Cavity Pumps
Product Summary
Genuine and compatible spare parts for the NETZSCH NEMO SY progressive cavity pump, the bearing-housing design with a free shaft end that takes any drive (electric, hydraulic or diesel), used across Australia for wastewater sludge, mining and mineral slurries, oil and gas, chemical and food duties. Every SY from the NM003 to the NM148 shares the same build (rotor, stator, coupling rod with joints, mechanical seal and bearing housing), so tick what you need and we’ll match the exact parts to your nameplate, such as NM063SY02S12B.
Spare Parts List
✓ Tick the parts you need. NEMO wear parts are matched to pump size, rotor/stator geometry, stator elastomer and joint type, so the full model code on your nameplate is all we need to get them right. Not sure which items? Add a photo of the nameplate and we’ll work it out for you.
| Select | Wear / Service Item | Function & when to replace |
|---|---|---|
| Common Service Kits | ||
| Stator | The elastomer-lined pumping element and the part that wears most. Replace when flow or pressure drops away, after any dry run, or if the elastomer has swollen, hardened or torn. | |
| Rotor | The hardened or coated helical rotor that turns inside the stator. Replace if the coating is worn through, scored or pitted; a worn rotor will chew out a new stator quickly. | |
| Joint Service Parts | The set of joint wear parts for both ends of the coupling rod: pins, bushes, joint sleeves, clamp rings and joint oil. Fit at every rotor/stator change or when the joints knock. | |
| Mechanical Seal | The standard single-acting, bi-directional mechanical seal, or the double or cartridge seal fitted to your pump. Replace at the first sign of leakage at the seal housing. | |
| Gland Packing Set | Packing rings for SY pumps built with a stuffing box instead of a mechanical seal. Repack when the gland can no longer be adjusted to a steady drip. | |
| Gasket & O-ring Set | Stator gaskets, housing O-rings and seal O-rings in an elastomer to suit the product. Renew whenever the pump is opened. | |
| Other Core Parts | ||
| Coupling Rod | Transmits drive from the shaft to the eccentric rotor. Replace if the bores are worn oval, the rod is bent, or corrosion has attacked it. | |
| Bearings & Shaft Seals | The rolling bearings and lip seals in the bearing housing that carry the drive shaft. Replace if noisy, running hot or showing play at the free shaft end. | |
| Drive Shaft | The shaft through the bearing housing to the coupling rod. Replace if worn under the seal or packing, or damaged at the keyway. | |
| Suction Housing | The inlet casing that holds the joints and seal. Replace if eroded, corroded or cracked, matched to your connection standard. | |
| Pressure Branch | The discharge end casing that clamps the stator. Replace if worn or cracked, or when changing connection size. | |
| Drive Coupling | The flexible coupling between the free shaft end and the motor, gearbox or hydraulic drive. Replace the element if worn or cracked (noise, vibration). | |
| Complete Replacement Pump | When a rebuild doesn’t stack up, we quote a like-for-like NEMO SY from the model code on your nameplate. | |
How we confirm the exact part: NEMO SY parts depend on pump size, number of stages, rotor/stator geometry, stator elastomer, rotor material, joint type and shaft seal. Your nameplate carries the model code (e.g. NM063SY02S12B) and the pump serial number, which together pin down the build. Tick the items above and add a nameplate photo, and we’ll confirm the correct parts for your exact pump.
Models
Spare parts are available for every NEMO SY size in the NETZSCH range; the three digits after NM on your nameplate (e.g. NM063SY) are the pump size.
Models & Key Specifications
| Size | Max. pressure | Max. capacity (m³/h) | Max. speed (rpm) |
|---|---|---|---|
| NM003 – NM011 | 72 bar | 0.003 – 0.2 (by size) | 1,000 |
| NM015 / NM021 | 72 bar | 2.5 / 3 | 800 |
| NM031 / NM038 | 72 bar | 5.4 / 18 | 600 |
| NM045 | 72 bar | 20 | 550 |
| NM053 | 72 bar | 31.5 | 550 |
| NM063 | 72 bar | 38 | 550 |
| NM076 | 72 bar | 60 | 550 |
| NM090 | 60 bar | 88 | 450 |
| NM105 | 48 bar | 133 | 350 |
| NM125 | 36 bar | 130 | 350 |
| NM148 | 24 bar | 350 | 250 |
All sizes: bearing housing with two-part shaft for any drive type, four rotor/stator geometries, mechanical seal as standard (other seal designs available), up to 500 m³/h overall and up to 240 bar in special designs.
Troubleshooting
Stator wears quickly or burns out
Likely cause: dry running (even for a few seconds), too high a liquid temperature for the elastomer, or abrasive solids at too high a speed. Action: fit a new stator (and rotor if scored); never start the pump empty, fit dry-run protection such as a stator temperature sensor, and confirm the elastomer and speed suit the duty.
Low flow or loss of pressure
Likely cause: worn rotor and stator, air drawn in on the suction side, a blocked suction line, or speed too low. Action: check the suction line and seals for air leaks and blockages and confirm the speed; if output is still down, replace the stator (and the rotor if its coating is worn).
Knocking or noise from the suction housing
Likely cause: worn joint pins and bushes or a split joint sleeve letting product in and joint oil out. Action: strip the joints, renew the pins, bushes, sleeves, clamps and joint oil as a set, and replace the coupling rod if it is worn at the bores.
Leaking at the seal or gland
Likely cause: worn or cracked mechanical seal faces (often from dry running or abrasive solids), or worn gland packing and a scored shaft. Action: replace the mechanical seal and O-rings, or repack the gland and adjust to a steady drip; check the shaft for wear under the seal or packing.
Bearing housing noisy or running hot
Likely cause: worn bearings, lost lubrication, or misalignment between the free shaft end and the drive. Action: check the shaft alignment and coupling, renew the bearings and lip seals, and lubricate to NETZSCH specification.
Damage after a blocked or closed discharge
Likely cause: over-pressure: a positive displacement pump keeps building pressure against a closed valve or blockage until something fails. Action: measure the actual discharge pressure against the nameplate rating, clear the blockage, inspect the stator, joints and seal, and fit a pressure relief or pressure switch on the discharge.
Pump hard to turn or trips on start after a stator change
Likely cause: stator swelling from an elastomer that is not compatible with the product or cleaning chemicals, or high break-away friction in a new tight stator. Action: check the elastomer against the product and its temperature; fill the pump before start-up (a little glycerine on a new stator helps); if the stator has swollen, replace it in a compatible elastomer.
Request for Quotation
Selected Parts:
- No parts selected
Not sure which parts? Just send a photo of the nameplate or part below.