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Diaphragm Pump Technology

Air-operated double-diaphragm (AODD) pumps provide versatile, seal-free transfer of abrasive, viscous, and shear-sensitive fluids. Our range covers metallic and non-metallic wetted paths in sizes from ¼" to 3", with flow rates up to 1,000 L/min and solids passage up to 12 mm.

Diaphragm pumps self-prime to 5 m and can run dry indefinitely without damage. Their positive-displacement action maintains flow regardless of discharge pressure, making them ideal for batch transfer, drum emptying, filter press feed, and chemical dosing duties across the full pH range.

Specifications & Operating Parameters

Flow Range

0.5 – 60 m³/hr

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Air Pressure

1.5 – 8.5 bar

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Suction Lift

Up to 7 m dry, 9 m wet

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Solids Passage

Up to 10 mm

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Temperature

Up to 120°C

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Materials

Aluminium, SS316, cast iron, PP, PVDF

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Diaphragm

NBR, Santoprene, PTFE, Viton

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Certification

ATEX II 2GD c IIB T4 available

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Where This Equipment Is Used

Proven across a wide range of industrial water and wastewater treatment processes.

Chemical Transfer

Safe pumping of aggressive chemicals between process units.

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Abrasive Slurries

Handling abrasive and corrosive slurry mixtures in mining and mineral processing.

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Flammable Liquids

Safe transfer of flammable solvents and hydrocarbons with ATEX compliance.

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Viscous Fluids

Pumping high-viscosity liquids and slurries with positive displacement.

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Tank Transfer

Pumping liquids between process tanks and storage vessels.

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Filter Press Feed

Pumping conditioned sludge to dewatering filter presses.

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Related Processes

This equipment is commonly integrated into the following treatment processes.

Chemical Dosing

Acid, alkali, and coagulant transfer — equations, design & control.

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Filtration Systems

Filter press feed and filtrate return.

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Mining & Minerals

Abrasive tailings and slurry transfer.

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Oil & Gas

Hazardous fluid transfer in ATEX zones.

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Related Equipment

Explore complementary equipment within our product range.

Peristaltic Pumps

Seal-free hose pumps for gassing, abrasive and shear-sensitive dosing.

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Progressive Cavity Pumps

Thick sludge, polymer and high-viscosity fluids.

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Chemical Dosing Pumps

Precision metering pumps for treatment chemicals.

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Dosing Pump Selection

Match diaphragm, peristaltic or PC pump to the duty.

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Industries We Serve

Our expertise spans multiple industries with sector-specific water treatment solutions.