The QBK air-operated double diaphragm pump is a reliable and efficient solution for transferring various types of liquids, including those that are corrosive, viscous, or contain solids. It operates using compressed air, making it ideal for use in hazardous environments where electrical equipment may not be safe.
This pump features two diaphragms that work alternately to move the liquid through the system. The absence of an electric motor ensures safety in explosive atmospheres, while its design allows for easy maintenance and operation.
The QBK series is widely used in industries such as food processing, chemical manufacturing, and wastewater treatment. It can handle both clean and abrasive fluids, making it a versatile choice for many applications.
2. Product Advantages

3. Partial Models for Clients (More models available upon request)
MODEL | Capacity | Head | Exit Pressure | Suction Head | Max Grain Dia. | Max Pressure | Max. Air Capacity | Inlet & Outlet |
(m³/h) | (m) | (Kgf/cm²) | (m) | (mm) | (Kgf/cm²) | (m³/min) | (mm) | |
QBK-10 | 1.62 | 70–84 | 67 | 5 | 1 | 8.4 | 0.3 | 10 |
QBK-15 | 3.42 | 5 | 1 | 0.3 | 15 | |||
QBK-25 | 9.42 | 5 | 2.5 | 0.6 | 25 | |||
QBK-40 | 21.48 | 5 | 4.5 | 0.6 | 40 | |||
QBK-50 | 35.22 | 5 | 8 | 0.9 | 50 | |||
QBK-65 | 63.6 | 5 | 8 | 0.9 | 65 |
4. Spare Parts Showing

5. Pump Instruction
6. Applications
7. Factory Show

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Spare Parts
The "Three-dragon" brand complete set of equipment for polypropylene (PP) spunbond non-woven fabrics and woven bags is sold throughout the country and exported to overseas markets, and now it covers more than 30 countries and regions, such as Russia, Vietnam, Indonesia, Malaysia, Bangladesh, Uzbekistan, Ethiopia, Congo, Nigeria, Syria, etc. Universal Packing Machinery's growing experience is also culturing our characters and forging our determination and indomitable will.
We are pursuing the science and technology of high humanity and intelligence. Our technology, characters and culture penetrate into every field of workmanship and business, from R&D to production and from sale to service. We always make sure that every step and every product is the perfect combination of technology and art.Our factory persistently observes the principle of "honest and faithful, quality utmost, reciprocal and mutual benefit". With high quality products and excellent services provided for all customers, we are creating a better world together with new and old friends.
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Zhejiang Sanlong Universal Machinery Co.,Ltd. , https://www.sanlongco.com