Model: QBY-25 / QBY3-25 (aluminum alloy)
The 1 inch QBY-25 in aluminum with PTFE diaphragms: what it handles, where aluminum is the wrong choice, its figures, and the black finish option.
| Flow Rate | Up to 2.4 m³/h |
|---|---|
| Head | Up to 60 m |
| Power | Compressed air, no motor |
| Inlet / Outlet Diameter | 25 mm (1") |
| Material | Aluminum alloy body, PTFE diaphragms |
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The 1 inch QBY-25 in aluminum alloy, fitted with PTFE diaphragms, is a light, practical pump for a wide range of plant liquids. Here is what you need to know before ordering one.
| Item | QBY-25 |
|---|---|
| Port size | 25 mm (1″) |
| Maximum flow | 2.4 m³/h |
| Maximum head | 60 m |
| Suction lift | up to 7 m |
| Solids passage | 2.5 mm |
| Air consumption | 0.6 m³/min |
The diaphragm is the part that flexes thousands of times an hour in contact with the liquid, so it is usually the first part to suffer from a solvent or an additive. PTFE resists almost all of them. Pairing it with an aluminum body gives a light pump with long-lasting diaphragms for oils, solvents, coolants, inks and paints.
When the liquid is acidic, alkaline or carries dissolved metals. The PTFE diaphragm would survive, but the aluminum body and manifolds would not. For acids and alkalis we suggest a polypropylene or stainless steel QBY instead, and for one electroplating customer we steered away from aluminum for exactly this reason.
Yes. The standard finish is the natural silver-grey of the casting, and the factory can paint the pump black. We have supplied black aluminum QBY-25 pumps for a customer who wanted the new pump to look the same as the one it was replacing.
QBY3 is the third-generation QBY, and codes like these come from older nameplates. The quickest way to match them is to tell us the port size, the body material and the diaphragm material, or send a photo of the nameplate, and we will confirm the equivalent pump.
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