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.

Parts That WearThe QBY has only a few wearing parts. This keeps maintenance simple and affordable. The main items are diaphragms, ball valves, and valve seats. Recommended Replacement Schedule Part In…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
Parts That Wear
The QBY has only a few wearing parts. This keeps maintenance simple and affordable. The main items are diaphragms, ball valves, and valve seats.
Recommended Replacement Schedule
| Part | Interval (Normal Duty) | Interval (Abrasive Duty) |
|---|---|---|
| Diaphragms | 12 months | 6 months |
| Ball Valves | 12 months | 6 months |
| Valve Seats | 12 months | 6 months |
| Gaskets | As needed | As needed |
| Air Valve Components | 24 months | 12 months |
Signs of Wear
Stocking Recommendation
Keep one set of diaphragms, ball valves, and seats for each pump size. This covers most emergency repairs.
Applications Summary:
pump maintenance, spare parts management, diaphragm replacement, valve replacement, preventive maintenance, industrial pump service
Thanks for visiting HAQUANPUMP. We stock full spare parts kits for all QBY diaphragm pump sizes. Contact us for parts orders.
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…