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.

With a 1-inch port and a strong 7-metre suction lift, the QBY-25 is the first QBY size built to move real particle loads. Its ball-check valves pass solids up to 2.5 mm, so mildly gritty or fibrous fl…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
With a 1-inch port and a strong 7-metre suction lift, the QBY-25 is the first QBY size built to move real particle loads. Its ball-check valves pass solids up to 2.5 mm, so mildly gritty or fibrous fluids no longer mean a blocked pump.
| Port size | 25 mm (1 in) |
| Max flow | 2.4 m³/h |
| Max head | 60 m |
| Suction lift | 7 m |
| Max particle | 2.5 mm |
| Air consumption | 0.6 m³/min (≤7 bar) |
The seal-less, positive-displacement design means the flow rises and falls with backpressure and simply stalls — harmlessly — if the discharge ever blocks, then resumes once it clears.
Applications: chemical transfer, coatings, emulsions, ceramic glaze, adhesives, light wastewater, food pastes
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.
QBY Air-Operated Diaphragm Pump (AODD)The Full QBY FamilyThe QBY series covers eight standard sizes from 10 mm to 100 mm. Flow ranges from 0.8 m³/h to 30 m³/h. Head goes up to 60 meters. There’s a model for almost every job. Complete Mode…
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…