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-25
The QBY-25 hits a sweet spot for many users. With a 25 mm port and flow up to 2.4 m³/h, it’s big enough for production work but small enough to move around. I’ve seen these used everywhere from small…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
The QBY-25 hits a sweet spot for many users. With a 25 mm port and flow up to 2.4 m³/h, it’s big enough for production work but small enough to move around. I’ve seen these used everywhere from small workshops to large factories.
Why It Works Well
•
Self-priming up to 7 meters
•
Handles solids up to 2.5 mm
•
Runs on shop air — no electrical connection
•
Lightweight and portable
•
Easy to clean between batches
Technical Details
| Parameter | Value |
|---|---|
| Model | QBY-25 |
| Port Size | 25 mm (1″) |
| Max Flow | 2.4 m³/h |
| Max Head | 60 m |
| Max Pressure | 6 kgf/cm² |
| Suction Lift | 7 m |
| Air Consumption | 0.6 m³/min |
Material Choices
You can get the QBY-25 in:
•
Aluminum – lightweight, good for general use
•
Stainless steel – for corrosive liquids
•
Cast iron – tough and abrasion-resistant
•
Polypropylene – chemical-resistant and affordable
Typical Jobs
Transferring plating solutions, pumping ink for printing presses, moving ceramic slurry, handling waste oil, circulating coolants in machining operations.
Applications Summary:
plating solution transfer, ink pumping, ceramic slurry handling, waste oil removal, coolant circulation, chemical dosing
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