QBY Air-Operated Diaphragm Pump (AODD)QBYS Stainless Steel Pneumatic Diaphragm Pump
The QBYS is the stainless-steel version of the QBY pneumatic diaphragm pump — SS304/SS316 for corrosive, food and hygienic fluids. Full size range, in stock.

Food transfer punishes the wrong pump: it shears sauces thin, smashes fruit pieces and traps residue in seals. A stainless steel QBY avoids all three. Its gentle stroke keeps texture intact, its solid…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
Food transfer punishes the wrong pump: it shears sauces thin, smashes fruit pieces and traps residue in seals. A stainless steel QBY avoids all three. Its gentle stroke keeps texture intact, its solids-friendly valves pass pulp and pieces, and its seal-less, cleanable wetted path keeps production hygienic.
It is a proven choice for peanut butter, jam, chocolate, syrup, honey and dairy, and it self-primes and runs dry so batch changeovers are quick. For sanitary lines we can supply food-grade elastomers and a polishable finish.
QBY Pneumatic Diaphragm Pump Technical Parameters
| Parameter | Specification Range |
|---|---|
| Flow Rate | 0 – 30 m³/h |
| Max Head | 0 – 50 / 70 m |
| Port Size (Caliber) | 10 – 100 mm |
| Working Temperature | -15℃ ~ +150℃ |
| Working Air Pressure | 0.1 – 0.7 MPa |
| Self-Priming Height | 5 – 7 m |
| Max Passable Solid Particle | 10 mm |
Applications: peanut butter and pastes, jam and fruit puree, chocolate and syrup, honey and molasses, dairy, sausage filling, pharmaceutical liquids

HAQUANPUMP builds the full QBY range in-house. Send us your fluid, flow and head, and we will recommend the exact model, body material and diaphragm for the job.
QBY Air-Operated Diaphragm Pump (AODD)The QBYS is the stainless-steel version of the QBY pneumatic diaphragm pump — SS304/SS316 for corrosive, food and hygienic fluids. Full size range, in stock.
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QBY Air-Operated Diaphragm Pump (AODD)When You Need Big FlowThe QBY-80 and QBY-100 are the largest standard models. They handle high-volume transfer jobs where smaller pumps would struggle. Both models share the same robust design princip…