In any industrial plant, overall efficiency also depends on the ability of each component to operate without interruption. An air-operated double diaphragm pump is no exception; it is the heart of many fluid transfer processes. GemmeCotti has designed and built the ideal pump for this need.
GemmeCotti HAOD Air-operated double diaphragm pump
The HAOD pump is a positive displacement pump that uses compressed air as its power source. Inside, two flexible diaphragms move, creating an alternating suction and discharge action. This simple yet effective design allows for the transfer of a wide variety of fluids, from clean, low-viscosity liquids to slurries and liquids containing solids.
Choosing the right model means guaranteeing operational continuity. GemmeCotti’s HAOD series pumps, born from consolidated Italian engineering experience, are designed with three fundamental aspects in mind that make them the ideal choice for the most demanding applications.
1. Total operational reliability
The design goes beyond the individual component, considering the entire product from the outset—a cornerstone for achieving total reliability.
- Advanced anti-stall pneumatic circuit: at the core of our pumps is a proven and efficient anti-stall pneumatic circuit, which ensures smooth and safe operation, even at low air pressures or in slow cycles. This design prevents blockages and ensures constant operation.
- Dry-running capability: HAOD pumps can run dry for extended periods without sustaining any damage. This is a crucial advantage for process safety, especially in applications such as drum unloading or tank emptying, where the pump can continue to work even after the liquid has run out.
- Robustness against closed discharge: unlike other positive displacement pumps, GemmeCotti HAOD pumps can operate with a closed discharge without problems, increasing safety and operational flexibility within the plant.
2. Intrinsic safety: the best choice for critical environments and hazardous fluids
When handling aggressive or flammable liquids, safety is not an option. HAOD pumps are intrinsically safer for these applications.
- ATEX certification: the HAOD series is available in an ATEX-certified version, making it suitable for installation in areas with potentially explosive atmospheres.
- Ideal for aggressive liquids and solvents: thanks to their pneumatic operation, they are the perfect solution for pumping solvents and flammable fluids, a fundamental requirement in the chemical and petrochemical industries.
3. Versatility and superior chemical compatibility
Every application has its challenges. That’s why we have designed a versatile industrial pump capable of adapting to different fluids and conditions.
- Wide choice of construction materials: chemical compatibility is guaranteed by a comprehensive selection of materials, making the HAOD a corrosion-resistant pump ideal for every need:
- Polypropylene (PP) pump: an excellent choice for a wide variety of acids and bases. It is the most common solution for an acid pump.
- PVDF pump: offers superior chemical and thermal resistance for the most aggressive fluids and for temperatures up to 95°C.
- AISI 316 stainless steel pump: Perfect for applications requiring high mechanical strength or compliance with specific standards, such as in the food and pharmaceutical sectors.
- Self-Priming pump: HAOD pumps have excellent dry suction capability, making them outstanding self-priming pumps for drawing fluid from significant heights.
- Handles solids and viscous fluids: their design enables them to pump abrasive, viscous, and solids-containing fluids without damage, making them the ideal solution for slurries and particle-laden liquids.
Reliability, safety, and versatility are the hallmarks of GemmeCotti HAOD diaphragm pumps.
For technical advice specific to your application needs, please contact GemmeCotti directly (info@gemmecotti.com).
