Specifications that decide fit
- Pump type for the product: viscosity, solids content and shear sensitivity decide between centrifugal and positive-displacement.
- Flow and head (or pressure), impeller diameter and motor power and speed.
- Wetted materials (stainless steel, alloys, plastics or graphite) and, for hygienic duty, sanitary connections and finish.
- Seal type — mechanical seal, packing or seal-less designs such as peristaltic and magnetic drive.
Condition checks
- Casing and impeller or rotors free of erosion and cracks.
- Shaft turns freely with no play in the bearings; seals not leaking.
- Motor nameplate voltage and frequency match your supply, or the motor can be replaced.
- For peristaltic pumps, the pump head and tube or hose size suit your flow; tubing is a wear part.
Documents to ask for
The pump nameplate and model number usually let you obtain the performance curve and spare parts from the manufacturer. Ask for the curve and any material certificates if the pump is for hygienic or corrosive service.
Questions buyers ask
Centrifugal or positive-displacement: which do I need?
Centrifugal pumps suit thin liquids at high flow. Choose positive-displacement for viscous products, shear-sensitive products, or when you need a steady flow independent of pressure.
Can a used pump be fitted with a different motor?
Usually yes, if the replacement has the right power, speed and mounting. This is common when the original motor voltage does not match local supply.
Why choose a peristaltic pump?
The product only touches the tube, so there are no seals to leak and cleaning is simple. That makes peristaltic pumps popular for sterile transfers, dosing and abrasive or shear-sensitive fluids.
Brands in stock
Found a machine you are interested in? Ask us for photos, documents or a price with the stock number on the listing.