Your fluid contains solids up to 20 mm? Here you find all pumps with a maximum solids passage of at least 20 mm.
Air-operated diaphragm pumps handle solids gently without rotating parts that could clog or wear. The passage through the valves is decisive: ball valves suit fine to medium solids, flap valves large and fibrous solids. A high solids content increases the density of the fluid – then rather choose a larger size.
Typical applications
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Waste water & sludge: waste water, filter press feed, sewage sludge, softening and lime sludges, coal and coke slurries
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Drilling: drilling mud, bentonite, lubricants, plaster mortar
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Cements & powders: mortar, diatomaceous earth, fillers with and without additives
Consider density and viscosity
Density and viscosity of the fluid are decisive for the selection – they have a considerable influence on the effective flow rate. Viscous fluids such as resins, adhesives or chocolate reduce the flow significantly and require larger suction lines and a slower stroke rate. Heavy fluids such as slurries or cements increase the required air pressure. Please state density (kg/dm³) and viscosity (mPa·s) in your enquiry.
Matching pumps in our range
Versamatic air-operated double diaphragm pumps with this feature are available in these versions:
All matching pumps are listed below – use the filters to narrow down flow rate, port size and materials.
Not sure which pump fits? Send us your medium, flow rate, pressure, temperature, density and viscosity – we will check the selection and reply with an offer.
Send technical enquiry
