Iron Pump BN 10-6L Progressive Cavity Single Screw Pump

Iron Pump BN 10-6L Progressive Cavity Single Screw Pump (Mfg. 2020)

The Iron Pump BN 10-6L (Manufactured in 2020) is a single-rotor progressive cavity positive displacement pump engineered for continuous, pulsation-free conveying of high-viscosity fluids, shear-sensitive emulsions, and abrasive particulate slurries. Designed around an interchangeable standard block architecture (dimensionally and hydraulically equivalent to standard SEEPEX BN range configurations), the BN 10-6L integrates a close-coupled lantern assembly that directly mounts to IEC/NEMA flange gearmotors. This eliminates intermediate baseplates, flexible couplings, and guard deflection while saving critical footprint space in commercial engine rooms and industrial skid assemblies.

Engineered with a high-integrity EN-JL 1040 (GG-25) grey cast-iron suction and discharge housing, the unit houses a 6L-geometry chromium-plated rotor rotating inside an elastomeric stator. Fluid cavities travel axially from suction to discharge at an output rate strictly proportional to drive speed, providing repeatable dosing accuracy and non-turbulent fluid handling ideal for marine oily-water separators (OWS), oily bilge transfer, ballast sediment purging, sludge dewatering, and municipal chemical metering.

Model Details

• Model Number / Size: BN 10-6L
• Manufacturer Part Number (MPN): BN10-6L-M2020-CI
• Geometry Class: 6L geometry (long pitch, extended seal line, optimized cavity area)
• Manufacturing Year: 2020
• Design Execution: Horizontal block-mount, direct plug-in shaft transmission, bi-directional capability

Technical Details:

Terminal Allocations & Electrical Wiring Specifications

• Main Power Feed: 3-Phase, 380V/400V/415V at 50 Hz (Star connection) or 440V/460V/480V at 60 Hz (Delta connection).
• Terminal Box Configuration: 6-Post Terminal Block (U1, V1, W1 / U2, V2, W2) with dedicated PE grounding post.
• Variable Frequency Drive (VFD) Operation: Inverter-duty rated per IEC 60034-18-41. Shielded motor cable with EMC cable glands required when integrated with automated PLC flow controllers.
• Dry-Run & Safety Interlocks: Terminals allocated for PTC thermistor sensor inside stator liner (trips drive if core elastomer temperature exceeds 90°C) and auxiliary contacts for discharge overpressure rupture switch (setting: max 6.5 bar).

Equipment Compatibility

• SEEPEX: BN 10-6L, MD 10-6L, BCSB 10-6L
• Allweiler (Colfax): ANBP 10.2 / AEB 1E-100 series (comparable duty point and manifold adaptation)
• Netzsch: NM038BY01L06B / NEMO standard block pumps
• Mono Pumps (NOV): Epsilon E101 / Monobloc B-Range
• Marine Separator System Compatibility: Direct OEM replacement for feed pumps on Alfa Laval (SA/SU series), GEA Westfalia (OSD/TSE), RWO Bilge Separators, and DVZ-Services oily water treatment plants.

Key Features

1. High-Efficiency 6L Geometry: Features an extended pitch and reduced rotor diameter that cuts fluid peripheral velocity, lowering shear friction, and tripling stator elastomer lifespan when conveying abrasive marine sediment or oily grit.
2. Direct-Coupled Monoblock Build: Motor and gearbox connect straight to the pump lantern via a spline/plug-in shaft, eliminating drive-shaft alignment tasks, flexible spider couplings, and dynamic bearing pedestals.
3. Bi-Directional Conveying Flow: Reversing the motor phase rotation reverses fluid direction, allowing the line to back-flush or clear discharge blockages without line venting.
4. Hermetically Sealed Pin Joints: Universal joints are encased in fluid-tight, grease-filled NBR protective sleeves clamped with marine 316-grade stainless bands, protecting mechanical pivot components from corrosive liquids.
5. Quick-Access Mechanical Seal: Cartridge or component single mechanical seals can be inspected, serviced, or flushed by sliding the lantern inspection plates without disassembling the discharge pipe.

Applications

• Marine & Offshore Operations: Marine oily-bilge transfer, oily water separator (OWS) steady feed, engine room waste oil/sludge burning pre-treatment, fuel bunker settling drain, black/gray sewage processing, and dirty ballast drainage.
• Industrial Wastewater Handling: Mechanical dewatering sludge feed, polymer flocculant dosing, dissolved air flotation (DAF) scum collection, and thick slurry sump scavenging.
• Chemical & Process Industry: Gentle transfer of shear-sensitive latex, polymer adhesives, paints, mineral oils, cutting emulsions, lime milk slurries, and organic chemical waste.
• Mining & Heavy Processing: Conveying neutralized effluent, abrasive fine mineral tailings, filter press cake pre-slurry, and non-stratified solid suspensions.

Frequently Asked Questions

Can the Iron Pump BN 10-6L run in reverse rotation?

Yes. The BN 10-6L operates in both counter-clockwise (standard) and clockwise rotation. However, when running in reverse, the suction port becomes the pressure port and the discharge port becomes the suction port. Make sure mechanical seal pressure ratings and flange pipe schedules match the reversed pressure path before energizing.

How do I size the motor power for this progressive cavity pump?

Motor sizing depends on fluid viscosity, specific gravity, and system discharge pressure. Clean water or low-viscosity bilge water operating at 2–3 bar requires roughly 1.5 kW. High-viscosity sludge (above 10,000 mPa·s) or operation up to 6 bar requires a 2.2 kW to 3.0 kW motor to provide sufficient breakaway starting torque.

What is the advantage of the 6L geometry over a standard 6L stage design?

The 6L design features an extended pitch length and shallower rotor depth compared to standard geometry. This design provides larger cavity volume at lower peripheral surface speeds, minimizing wear when pumping abrasive fluids and ensuring low shear for delicate emulsions like bilge oily water.

How do I tell if my pump stator needs replacement?

The clearest indicators are a gradual decline in flow rate against static discharge pressure, elevated motor operating temperatures, or needing higher RPM to maintain system output. If the rotor turns freely by hand without resistance, internal interference fit has worn down, confirming that a new stator is required.