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Diesel Diaphragm Pumps

Heavy-duty mechanical diaphragm pumps engineered for long-runtime operation, remote locations and demanding industrial environments.
Allflo’s diesel-driven diaphragm pumps deliver exceptional durability, extended operational endurance and high reliability for sludge, slurry, industrial waste, raw sewage and abrasive process fluids.


With robust gearboxes, eccentric drive systems and the ability to self-prime, run dry and handle solids up to 80% of port size, these units are trusted by contractors and councils for their reliability, rugged construction and customisability.
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  • Self-priming, run-dry operation for safe use during variable flow or low-level events
  • Handles high-viscosity, abrasive and solids-laden fluids with minimal wear
  • Mechanical drive system built for long runtimes, remote sites and industrial duty
Typical Applications
▫️Sludge, slurry, and abrasive waste transfer
▫️Raw sewage, screenings, and industrial waste
▫️Dewatering at remote or unattended sites
▫️Council wastewater & stormwater bypass
▫️Tunnel, civil, and construction dewatering
▫️Pumping high-solids fluids where centrifugal pumps fail
Benefits

Exceptional solids handling — up to 80% of port size
No mechanical seal failures thanks to diaphragm design
Run-dry capability for safety and reliability on variable flow sites
Low maintenance mechanical drive system with long service intervals
Ideal for remote use — reliable starting, consistent operation, simple servicing
Versatile installation options including trailer, skid and custom frames

RDO25D – 1" Diesel Diaphragm Pump
Compact diesel-driven diaphragm pump designed for chemical waste, paints, resins, small sludge volumes, and general-purpose dewatering.

Key Features

  • Self-priming and dry-run capable
  • Lightweight footprint with strong pumping capability
  • Ideal for viscous fluids and chemical waste transfer

Performance Summary:

  • Port size: 1" (DN25)
  • Flow: ~16–25 L/min
  • Suction lift: up to 7.5 m
  • Head: ~6 m
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RDO32D – 1¼" Diesel Diaphragm Pump
Reliable diesel mechanical diaphragm pump for sludge, wastewater, and industrial waste streams.

Key Features

  • Strong solids-handling
  • Excellent for site dewatering and contaminated liquids
  • Durable diesel drive for extended continuous use

Performance Summary:

  • Port size: 1¼" (DN32)
  • Flow: ~33 L/min
  • Suction lift: up to 7.5 m
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RDO38D – 1½" Diesel Diaphragm Pump
Heavy-duty diaphragm pump suited to viscous fluids, sludges, and abrasive waste.

Key Features

  • Enhanced diaphragm chamber for high-solid pumping
  • Industrial-grade construction for harsh environments

Performance Summary:

  • Port size: 1½" (DN40)
  • Flow: ~50 L/min
  • Suction lift: up to 7.5 m
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RDO50D – 2" Diesel Diaphragm Pump
High-volume diaphragm pump for mining, waste handling, raw sewage, and continuous-duty industrial applications.

Key Features

  • Large diaphragm delivers excellent flow range
  • Handles abrasive and corrosive fluids
  • Suitable for high-solid, high-viscosity streams

Performance Summary:

  • Port size: 2" (DN50)
  • Flow: ~100 L/min
  • Suction lift: up to 7.5 m
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RDO76D – 3" Diesel Diaphragm Pump
Maximum-flow diesel mechanical diaphragm pump designed for the toughest sludge, slurry, and waste pumping requirements.

Key Features

  • Heavy-duty frame for continuous industrial operation
  • Handles extremely thick sludge and high-solid fluids
  • Built for mine-spec and remote site conditions

Performance Summary:

  • Port size: 3" (DN80)
  • Flow: ~210 L/min
  • Suction lift: up to 7.5 m

Materials & Configuration Options

  • Diaphragms: Buna-N, Neoprene, Viton
  • Wetted Parts: Aluminium, 316 Stainless Steel, Cast Iron
  • Mounting: Baseplate, Skid, Carry Frame, Weatherproof Enclosure
  • Optional engine guards, lifting points, anti-vibration mounts
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Remko RD Series: Diesel Diaphragm Pumps

The RD Series Petrol Diaphragm Pumps use a mechanical eccentric cam and gearbox to actuate a reinforced diaphragm, delivering strong suction lift and reliable pumping performance without seals or rotating wetted parts.

These pumps excel in sludge, slurry, wastewater, abrasive media and solids-laden fluids, making them ideal for short-term worksites, rapid-response pumping and locations without access to electrical power. With fast-start petrol engines, rugged frames, and self-priming capability, they provide a practical, versatile pumping solution for trades, councils, civil crews, and maintenance teams.

Available in 1”–3” sizes, the RD Series can be configured with different wetted materials, diaphragm compounds, and mounting options to match job-site requirements.

The RD Series is a reliable choice for construction, civil works, emergency response, industrial waste handling and maintenance applications where portability, rapid deployment and dependable performance are essential.
General Performance
▫️Suction lift: up to 7.5 m
▫️Head: up to ~6 m
▫️Solids handling: up to 80% of port size
▫️Port sizes: 1" to 3" (DN25–DN80)
▫️Wetted parts: Aluminium, Stainless Steel, Cast Iron
▫️Diaphragms: Buna-N, Neoprene, Viton
▫️Mounting options: Baseplate, Skid, Carry Frame, Weatherproof Enclosure

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