Double-diaphragm pumps are an established solution for handling aggressive or hazardous fluids in a variety of application areas. Designed to handle viscous, abrasive, and corrosive fluids, they are ideal for chemical processing and transfer, water treatment, paper and pulp, as well as food and pharmaceutical industries.
Air operated double diaphragm pumps have the following advantages:
✅ Compressed air supply: double diaphragm pumps do not require the use of electricity, a factor that makes them extremely safe within potentially explosive and flammable environments
✅ Design features: the special design configuration, in addition to making them easily transportable within the plant, allows safe and efficient transfer of a wide range of liquids even with the presence of suspended solids such as sludge, wastewater, sand, leaves and branches
✅ Construction materials: the components of membrane pumps, due to the use of special construction materials, are subject to limited wear and tear. This factor is also emphasised by the special design features that avoid fluid contact with the main pump components, thus reducing the risk of wear
✅ Self-priming capabilities: double diaphragm pumps are capable of dry running and demonstrate excellent self-priming capabilities
✅ Safety certifications: double diaphragm pumps can be ATEX and IECEx certified and therefore used within potentially hazardous or explosion-prone industries
SO HOW DO THEY WORK?
✅ Imagine two flexible diaphragms connected by a shaft. These diaphragms move back and forth (similarly to lungs)
✅ Air is pumped into one side of the pump, pushing one diaphragm forward
✅ This movement forces liquid out of the pump on that side
✅ At the same time, the opposite diaphragm creates a vacuum, pulling new liquid into the pump
✅ A valve switches the air to the other side, and the process repeats
Whether you’re dealing with aggressive chemicals or ATEX-rated environments, AODD pumps offer you a reliable and flexible solution.
When selecting a pump for your process, one of the most important factors to consider is fluid viscosity. Whether you’re pumping water-thin solvents or thick sticky slurries, viscosity can significantly affect flow rate, pump life, and overall system performance.
If you’re ready to find the right pump for your application, get in touch with us today for your pump requirements.
Call us on 01442 860000 or email us at sales@cougar-industries.co.uk
@2025