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.

Use the QBY explosion proof AODD pump for safe chemical transfer of acids, solvents, and toxic liquids. Spark free, leak proof design with PTFE and stainless steel options. The QBY air operated diaphr…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0-50m |
| Power | 0.25-5.5kW |
| Inlet / Outlet Diameter | 10-100mm |
| Material | Polypropylene (PP), Aluminum Alloy, Cast Iron, Stainless Steel (SS304 / SS316L) |
Use the QBY explosion proof AODD pump for safe chemical transfer of acids, solvents, and toxic liquids. Spark free, leak proof design with PTFE and stainless steel options.
The QBY air operated diaphragm pump is ideally suited for the chemical and petrochemical industries where safety and reliability are paramount. It can handle concentrated acids, strong alkalis, solvents, suspensions, dispersions, crude oil, heavy oil, greases, drilling muds, sludge, and various toxic, flammable, and volatile liquids. Because the pump is powered entirely by compressed air and produces no electrical sparks, it is inherently explosion-proof and safe for use in classified hazardous areas.
The pump’s isolation design is a key safety feature. The diaphragms completely separate the pumped fluid from the pump’s moving parts and the external environment. This leak proof pump design eliminates the risk of leaks, fugitive emissions, and environmental contamination, even when handling highly corrosive or toxic substances. The pump can also handle abrasive slurries and particle-laden fluids common in chemical processing without excessive wear, thanks to its slow stroking action and large internal passages.
For aggressive chemical service, the pneumatic diaphragm pump body can be specified in polypropylene (PP), PVDF, or stainless steel, with diaphragms made from PTFE or fluororubber (FKM). These materials provide excellent resistance to a broad range of chemicals across a wide temperature range (-15°C to +150°C). The pump can be used for drum emptying, tank transfer, reactor feed, filtration systems, waste collection, and emergency spill response. Its ability to run dry and self-prime makes it particularly valuable for unloading tank trucks and railcars.
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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…