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.

Model: QBY-40
Here’s a pump that shows up on job sites everywhere. The QBY-40 with its 40 mm port moves up to 8 m³/h and pushes liquid up to 60 meters high. It’s a favorite in wastewater plants, chemical factories,…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
Here’s a pump that shows up on job sites everywhere. The QBY-40 with its 40 mm port moves up to 8 m³/h and pushes liquid up to 60 meters high. It’s a favorite in wastewater plants, chemical factories, and construction sites.
What Sets It Apart
The QBY-40 uses a double-diaphragm design with two chambers working alternately. Compressed air shifts between chambers, pushing the diaphragms back and forth. This creates suction on one side while discharging on the other — smooth and continuous flow.
Solid Performance Data
| Parameter | Value |
|---|---|
| Model | QBY-40 |
| Port Size | 40 mm (1.5″) |
| Max Flow | 8 m³/h |
| Max Head | 60 m |
| Max Pressure | 6 kgf/cm² |
| Suction Lift | 7 m |
| Solids Passage | 4.5 mm |
| Air Consumption | 0.6 m³/min |
Where It Shines
•
Pumping sludge from settling tanks
•
Transferring acids between storage vessels
•
Moving food products like chocolate and jam
•
De watering excavation sites
•
Feeding filter presses in mining operations
Maintenance Tips
Change the diaphragms when you notice reduced flow. Check the ball valves and seats for wear every few months. Keep the air supply clean — install an air filter if you haven’t already.
Applications Summary:
sludge pumping, acid transfer, food product handling, dewatering, filter press feeding, mining operations, wastewater treatment
We appreciate you visiting HAQUANPUMP. If you’re looking for a dependable QBY diaphragm pump, we’ve got you covered. Contact our team for specs, pricing, or application advice — we’re happy to help.
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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