Roodhart Mono Pump BPI-10DNL1 Progressive Cavity Single Screw Pump

Roodhart Mono Pump BPI-10DNL1 Progressive Cavity Single Screw Pump

The Roodhart Mono Pump BPI-10DNL1 is a positive displacement progressive cavity single screw pump engineered for transfer of shear-sensitive, high-viscosity, and abrasive media. Sourced from premium marine surplus, this unit provides pulsation-free fluid delivery across varying discharge pressures, making it an optimal component for shipboard auxiliary machinery spaces, waste oil reclamation modules, and industrial process streams.

Operating on progressive cavity mechanics—where an eccentric helical rotor turns within an elastomeric stator cavity—the BPI-10DNL1 delivers a continuous, metered flow without emulsifying or shearing fragile media. Whether installed for oily bilge separator feed, heavy fuel oil (HFO) transfer, or wastewater processing, the BPI-10DNL1 maintains constant displacement efficiency even against elevated dynamic backpressures.

Technical Details:

Compatibility:

• Direct Equivalent: Roodhart BPI-10DNL1
• Drop-in Dimensional Interchangeability: Compatible with select installations using Mono Pumps (NOV) C-Range / B-Range, Allweiler SEP / AEB series, Seepex MD / BN series, and Netzsch NM / NE series units of comparable displacement volumes.
• Marine Plant Interchange: Direct swap-out for engine-room separator supply pumps, MARPOL annex-compliant bilge handling packages, decanter centrifuge feed pumps, and black/grey water sanitary delivery manifolds.

Key Features

1. Low-Shear Laminar Flow: The single helical rotor creates rolling, sealed cavity chambers that translate fluid axially without high turbulence, preventing oil-water emulsification in separator feed lines.
2. High-Viscosity & Entrained Solids Handling: Engineered to pump thick sludge, raw sewage, waste lube oil, and slurries without line clogging or mechanical jamming.
3. Wear-Resistant Rotating Geometry: Hard-chrome-surfaced rotor coupled with an oil-impervious elastomer stator delivers sustained volumetric efficiency even when handling abrasive marine sediments.
4. Direct Self-Priming Action: Delivers high suction lift (up to 7–8.5 meters of water column), allowing effective suction from deep engine room bilge wells, double-bottom tanks, and holding reservoirs.
5. Modular Maintenance Envelope: Quick-release access to the connecting rod universal pin joints allows swift stator/rotor change-out during short port stays without dismounting primary pipework.

Applications

• Marine Engine Room Bilge & Sludge: Oily bilge water transfer, bilge separator (OWS) positive-displacement feed, purifier waste sludge handling, and drain collection transfer.
• Heavy Fuel & Lube Oil Systems: Settling tank skimming, waste lube oil processing, decanting system charging, and tank residue disposal.
• Industrial Wastewater & Slurry Transfer: Chemical effluent dosing, clarifier bottom slurry evacuation, filter press supply, and industrial biological solids dewatering.
• Offshore & Shipyard Applications: Ballast sediment purging, tank-cleaning effluent evacuation, and deck slop management.

Frequently Asked Questions

Can the Roodhart BPI-10DNL1 pump be operated in reverse rotation?

Yes, progressive cavity pumps can operate bidirectionally by reversing motor rotation. Reversing shaft rotation changes the suction and discharge ports, though gland packing and mechanical seal configurations must be verified to ensure the seal chamber is not subjected to uncontrolled high backpressure.

What is the maximum dry suction lift capability of this unit?

While the pump can develop suction lifts up to 7 to 8.5 meters when wetted, initiating suction from a bone-dry state without internal liquid lubrication will damage the stator. Always pre-wet the pump housing before commissioning dry suction pipelines.

Which elastomer compound is installed in this BPI-10DNL1 stator?

The standard marine model comes equipped with high-grade Nitrile (NBR) rubber, designed specifically for hydrocarbons, oily water mixtures, light lubricating oils, and common bilge/sludge applications up to 90°C.

Does this pump include the electric motor drive assembly?

This unit is supplied as a standard bare-shaft pump with a keyed drive shaft ready to accept a flexible coupling, geared speed reducer, or direct-coupled electric motor meeting your specific operational speed and power requirements. Full baseplate-and-motor skids can be configured upon request.