QBK Pneumatic Diaphragm Pumps also called Air operated double diaphragm pumps(AODD Pump)are rugged and durable self-priming, double diaphragm pumps, can handle any products that pours, form clean water to highly viscous, abrasive and chemically materials.
Simple structure, easy to use and maintenance, less wearing parts. It can be working under liquid and running dry as well.
Suction up to 5m, max discharge pressure is 7bar, max grain diameter is 10mm, max liquid viscosity is 10,000C.s.t.
Material:PP, Aluminum, Cast Iron, Stainless Steel. Diaphragm material:NBR, Viton, Teflon, FEP etc.
Flow rate can be controlled from zero to max flow by increasing or decreasing air pressure.
| Model | Diameter(mm) | Max Flow(L/min) | Suction(m) | Max Discharge Pressure(Bar) | Max Grain Dia(mm) | Max Air Consumption(L/min) |
| QBK-8 | 8 | 16 | 5 | 6.9 | 1 | 300 |
| QBK-10/15 | 10/15 | 20 | 5 | 6.9 | 1 | 300 |
| QBK-25 | 25 | 100 | 5 | 6.9 | 2.5 | 600 |
| QBK-40 | 40 | 140 | 5 | 6.9 | 4.5 | 600 |
| QBK-50 | 50 | 240 | 5 | 6.9 | 8 | 900 |
| QBK-65 | 65 | 280 | 5 | 6.9 | 8 | 900 |
| QBK-80 | 80 | 400 | 5 | 6.9 | 10 | 1500 |
| QBK-100 | 100 | 480 | 5 | 6.9 | 10 | 1500 |
QBK-40 PP Pneumatic Diaphragm Pump (AODD Pump): Comprehensive Product Guide
The QBK-40 PP Pneumatic Diaphragm Pump (AODD Pump) is a high-performance air-operated double diaphragm pump engineered for safe, efficient, and reliable liquid transfer in industrial, chemical, and water treatment applications. Constructed from polypropylene (PP), the pump exhibits excellent chemical resistance, corrosion protection, and lightweight design, making it ideal for handling acids, alkalis, corrosive solutions, and abrasive liquids.
Operating without electricity, the QBK-40 PP AODD Pump ensures safe use in hazardous environments, delivering smooth, pulsation-free flow for precise and consistent liquid transfer. Its easy maintenance and energy-efficient performance make it a top choice for industries requiring reliable and safe pumping solutions.
Chemical-Resistant Polypropylene Construction
PP body and wetted parts provide outstanding resistance to acids, alkalis, and corrosive fluids.
Lightweight design facilitates easy installation and portability.
Air-Operated Efficiency
Operates on compressed air without electricity, suitable for hazardous and flammable environments.
Reduces electrical risks while ensuring reliable performance.
Smooth, Pulsation-Free Flow
Provides stable flow for chemical dosing, water treatment, and industrial processes.
Reduces turbulence and prevents backflow.
Low Maintenance and Easy Servicing
Minimal moving parts allow fast replacement of diaphragms, valves, and seals.
Reduces operational downtime and maintenance costs.
Energy Efficiency
Optimized diaphragm design minimizes air consumption per unit of pumped liquid.
Reduces long-term operational costs.
| Parameter | QBK-40 PP AODD Pump Details |
|---|---|
| Pump Type | Pneumatic Diaphragm (AODD) |
| Material of Construction | Polypropylene (PP) |
| Flow Rate | 40 L/min (typical) |
| Maximum Pressure | 7 bar |
| Maximum Suction Lift | 6 m |
| Maximum Discharge Head | 20 m |
| Air Supply Pressure | 2–7 bar |
| Air Consumption | 5–7 m3/min |
| Viscosity Range | Up to 1000 cP |
| Fluid Temperature Range | 0°C to 80°C |
| Inlet / Outlet Connection | 1.5" BSP / NPT Threaded |
| Certifications / Standards | CE, ISO 9001, RoHS |
Verify pump model and connections.
Inspect diaphragms, valves, and seals for integrity.
Ensure a clean, dry compressed air supply is available.
Fill the inlet pipe or pump chamber with liquid before starting.
Open air supply gradually to prevent sudden pressure surges.
Monitor the pump to ensure proper flow and no air pockets.
Follow the flow direction arrow on the pump body.
Avoid running dry; ensure the pump is always primed with liquid.
Use proper filtration to prevent abrasive damage to diaphragms and valves.
Operate within recommended air pressure (2–7 bar).
Wear personal protective equipment (PPE) including gloves, goggles, and protective clothing when handling hazardous liquids.
Ensure all connections are tight and leak-free before operation.
Disconnect air supply and relieve pressure before maintenance or inspection.
Avoid using the pump with explosive or highly flammable liquids unless certified for such use.
Maintain proper ventilation in areas handling corrosive chemicals.
The QBK-40 PP Pneumatic Diaphragm Pump adheres to international standards ensuring quality, safety, and environmental responsibility:
CE Certification: Conforms to European safety and performance standards.
ISO 9001: Quality management system for consistent manufacturing and product reliability.
RoHS Compliance: Environmentally friendly materials with restricted hazardous substances.
Optional ATEX Certification for safe use in explosive environments.
These certifications confirm the pump’s high safety, reliability, and eco-friendly operation, suitable for global industrial and chemical applications.
Proper installation ensures optimal performance and longevity.
Place on a stable, level surface to minimize vibration.
Secure using bolts or brackets provided.
Avoid areas with excessive heat, dust, or moisture.
Connect inlet and outlet pipes following the flow direction marking.
Use thread sealant or gaskets to prevent leaks.
Maintain straight pipe runs: minimum 3×DN upstream and 2×DN downstream.
Connect a clean, regulated, and lubricated compressed air supply.
Install filter, regulator, and lubricator (FRL) for consistent operation.
Gradually open air supply.
Monitor for leaks, unusual noise, or pulsation.
Adjust air pressure to achieve desired flow and efficiency.
Inspect diaphragms, valves, and seals daily for wear or damage.
Check air supply lines and connections for leaks.
Clean external surfaces to remove chemical residues.
Weekly: Inspect internal diaphragms and valves.
Monthly: Perform a full pump cleaning and check moving parts.
Annually: Replace worn diaphragms, valves, and seals; conduct performance testing.
| Issue | Possible Cause | Solution |
|---|---|---|
| Pump not operating | No air supply or blocked air line | Check air supply, clean filter, inspect tubing |
| Reduced flow or output | Clogged inlet/outlet or worn diaphragm | Clean valves and tubing, replace diaphragm |
| Air leakage from pump | Damaged seals or loose connections | Replace seals, tighten fittings |
| Excessive noise or vibration | Improper mounting or cavitation | Reinstall securely, check suction line, reduce air pressure |
| Pulsation in fluid flow | Air trapped or blocked discharge | Purge air, clear obstructions |
The QBK-40 PP Pneumatic Diaphragm Pump is widely used in:
Chemical Industry – Transfer of acids, alkalis, solvents, and corrosive chemicals.
Water and Wastewater Treatment – Dosing chemicals and handling corrosive fluids.
Food and Beverage Industry – Safe handling of syrups, juices, and liquid ingredients.
Pharmaceutical Industry – Precision dosing and transfer of medicines and solutions.
Industrial Manufacturing – Lubrication, chemical injection, and automated processes.
Corrosion-Resistant: Polypropylene body suitable for aggressive chemicals.
Air-Operated: Safe for hazardous and flammable environments.
Energy-Efficient: Optimized air usage reduces operational costs.
Smooth Flow: Pulsation-free design ensures stable liquid transfer.
Low Maintenance: Quick access to diaphragms, valves, and seals.
Certified Safety: CE, ISO 9001, RoHS, optional ATEX.
Lightweight Design: Easy installation and portability.
Pumps are packed with protective foam and corrugated boxes.
Wooden crates for export or bulk shipments.
Moisture-proof wrapping ensures safe transport over long distances.
Clear labeling includes model number, serial number, air pressure rating, and handling instructions.
Available via air, sea, or courier.
Bulk shipping and palletization options available for distributors.
Compliant with international shipping standards.
The QBK-40 PP Pneumatic Diaphragm Pump (AODD Pump) delivers durable, safe, and energy-efficient liquid transfer for industrial, chemical, food, and water treatment applications. Its chemical-resistant polypropylene construction, air-operated design, pulsation-free operation, and low maintenance requirements make it ideal for precise, safe, and reliable liquid handling.
Whether for chemical dosing, water treatment, or industrial automation, the QBK-40 PP AODD Pump ensures long-term, efficient, and safe operation, making it a trusted choice for global industries.
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