SEEPEX BN Pumps
Spare Parts for SEEPEX BN Progressive Cavity Pumps
Product Summary
Genuine and compatible spare parts for the SEEPEX BN progressive cavity pump, the compact block-design standard pump with its drive flanged straight onto the lantern, used across Australia for sludge, polymer, chemical and process transfer. Every BN shares the same build (rotor, stator, coupling rod with pin joints, plug-in shaft and shaft seal), so tick what you need and we’ll match the parts to your nameplate, such as BN 10-6L.
Spare Parts List
✓ Tick the parts you need. SEEPEX parts are matched to the pump range, size, rotor/stator geometry, stator elastomer and shaft seal, so the type code and the commission number on your nameplate are 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 | ||
| Minor Set of Wearing Parts | SEEPEX’s own minor wear set: the stator (601), plus the rinse ring (311) on sizes 05-24 to 300-6L. The quick fix when output has dropped but the joints are still sound. | |
| Major Set of Wearing Parts | The full overhaul set from the SEEPEX parts list: plug-in shaft, coupling rod with bushings, coupling rod pins, guide bushings, universal joint sleeves, holding bands, rotor and stator. | |
| Set of Gaskets | Mechanical seal (330), casing gasket (501) and sealing rings (503), plus the cleaning-cover O-rings (511) and sealing rings (517, 706) on the larger sizes. Renew whenever the pump is opened. | |
| Complete Set of Joint Parts (items 401–407) | Retaining sleeve, coupling rod pins, guide bushings, universal joint sleeves and holding bands for both pin joints. Fit at every rotor/stator change or when the joints knock. | |
| Wear & Consumable Parts | ||
| Stator (item 601) | 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 (item 600) | The helical rotor that turns inside the stator. Replace if it is scored, pitted or worn through its coating; a worn rotor will chew out a new stator quickly. | |
| Mechanical Seal (item 330) | The shaft seal at the drive end of the suction casing (gland packing on some builds). Replace at the first sign of leakage; check the seal faces and O-rings for wear and chemical attack. | |
| Pin Joint Grease (item 098) | SEEPEX special joint grease. The manual calls for fresh grease every 10,000 operating hours and at every joint rebuild; SEEPEX specifies its own grease only. | |
| Casing Gasket (item 501) | Seals the stator to the suction casing. Fit a new one every time the stator is changed. | |
| Other Core Parts | ||
| Coupling Rod with Bushings (item 400) | Carries the drive from the plug-in shaft to the eccentric rotor through a pin joint at each end. Replace if the bores are worn oval, the rod is bent, or corrosion has attacked it. | |
| Plug-in Shaft & Pin (items 307, 309) | The plug-in shaft that connects the drive to the coupling rod and carries the shaft seal. Replace if it is worn or grooved under the seal or damaged at the joint end. | |
| Suction Casing (item 500) | The inlet casing that houses the joints and shaft seal. Replace if eroded, corroded or cracked, matched to your connection standard. | |
| Pressure Branch (item 700) | The discharge end casing that clamps the stator. Replace if worn or cracked, or when changing connection size. | |
| Drive Unit (gearmotor) | The flanged gearmotor (block design) or the separate drive train on bare-shaft builds. Matched to your kW, output speed and mounting so the replacement bolts straight on. | |
| Complete Replacement Pump | When a rebuild doesn’t stack up, we quote a like-for-like SEEPEX BN pump from the type code and commission number on your nameplate. | |
How we confirm the exact part: SEEPEX BN parts depend on the size, rotor/stator geometry, stator elastomer, rotor material, joint type and shaft seal fitted to your pump. The item numbers shown are the positions in the SEEPEX parts list; your nameplate carries the type code (e.g. BN 10-6L) and the commission 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
Parts are available across the BN size range; the size code after BN on your nameplate (e.g. BN 10-6L) identifies the pump. The sizes below are those SEEPEX lists in its manuals and its Australian fast-delivery programme.
Models & Key Specifications
| Size | Operating instructions | Joint parts set | Set of gaskets |
|---|---|---|---|
| BN 025-12 | BN 025-12 to 1-6L | 401–406 | 330, 501, 503 |
| BN 05-12 | BN 025-12 to 1-6L | 401–406 | 330, 501, 503 |
| BN 1-6L | BN 025-12 to 1-6L | 401–406 | 330, 501, 503 |
| BN 05-24 | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 2-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 5-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 10-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 17-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 35-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 52-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 70-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
| BN 300-6L | BN 05-24 to 300-6L | 401–407 | 330, 501, 503, 511, 517, 706 |
Item numbers are positions in the SEEPEX parts lists. Range data from seepex.com: 0.03–500 m³/h, up to 48 bar. Per-size flow and pressure depend on the rotor/stator geometry and speed on your pump’s data sheet. BN pumps fitted with SEEPEX Smart Conveying Technology (split stator) use different stator parts; tell us if yours is an SCT build.
Troubleshooting
Pump runs but delivers little or nothing
Likely cause: worn stator and rotor, a blocked suction line, or speed too high for a viscous product (cavitation). Action: clear the suction line and check the speed against the duty; if output is still down, replace the stator (item 601), and the rotor (item 600) if it is scored.
Stator wears quickly or burns out
Likely cause: dry running, solids or grain size too large for the pump speed, or product temperature too high for the elastomer. Action: fit a new stator, reduce speed or screen the feed, keep the pump full at start-up and fit dry-run protection; SEEPEX also suggests an undersize rotor for hot duties.
Pump hard to turn or will not start after a stator change
Likely cause: stator swollen by an incompatible product, or product that has settled, gummed up or set inside the pump while it stood. Action: check the stator elastomer against the product and select a suitable material; rinse and clean the pump immediately after stopping, and heat it if the product hardens when cold.
Knocking or noise from the suction casing
Likely cause: worn joint parts or too much joint play, often with grease lost through a split joint sleeve. Action: renew the complete set of joint parts with SEEPEX pin joint grease and check the coupling rod bushings are correctly fitted.
Leaking at the shaft seal
Likely cause: a worn mechanical seal (sliprings or O-rings) or packing that is worn or set too tight. Action: check the sliprings and O-rings for wear and chemical resistance and renew the seal; on packed pumps adjust the gland or renew the packing rings.
Motor runs hot or trips
Likely cause: over-pressure against a closed or blocked discharge, a swollen stator, or worn bearings in the drive. Action: check discharge pressure and motor current, inspect the stator for swelling, and renew the drive bearings if they are rough; fit pressure protection on the discharge.
Request for Quotation
Selected Parts:
- No parts selected
Not sure which parts? Just send a photo of the nameplate or part below.