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.

Choosing the Right Body MaterialThe QBY comes in four standard materials. Each has strengths for different applications. Here’s a quick comparison. Material Comparison Table Material Weight Corrosion…
| Flow Rate | 0-30m³/h |
|---|---|
| Head | 0 – 50 / 70m |
| Inlet / Outlet Diameter | 10 – 100mm |
| Material | PP Engineering Plastic, Aluminum Alloy, Cast Iron, Stainless Steel |
Choosing the Right Body Material
The QBY comes in four standard materials. Each has strengths for different applications. Here’s a quick comparison.
Material Comparison Table
| Material | Weight | Corrosion Resistance | Abrasion Resistance | Cost |
|---|---|---|---|---|
| Aluminum | Light | Moderate | Moderate | Low |
| Stainless Steel | Medium | Excellent | Good | High |
| Cast Iron | Heavy | Low | Excellent | Medium |
| Polypropylene | Light | Excellent | Poor | Low |
When to Choose Each
•
Aluminum – general industrial, oils, fuels
•
Stainless Steel – chemicals, food, pharmaceuticals
•
Cast Iron – mining, slurry, abrasive fluids
•
Polypropylene – acids, alkalis, water treatment
Diaphragm Material Matters Too
Match the diaphragm to the fluid. PTFE for chemicals, NBR for oils, FKM for high temperatures.
Applications Summary:
material selection, chemical compatibility, pump specification, industrial fluid handling, corrosion resistance, abrasion resistance
Thanks for reading from HAQUANPUMP. We offer QBY diaphragm pumps in all four materials. Contact us for help choosing the right one
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…