Go BackGo back
Product code: Fullflow 502

Non-Clog Full Flow - 2.5" AODD Pump

Pump Type - AODD

Max Flow Rate - 32M³H

Max Head - 40M

Pump Materials - PP, PP with Carbon Impregnation

Max Temp - 65°C

Max Viscosity - 20,000 cst

Max Solid Passage - 45mm

Self Priming - Y

Inlet/Outlet Sizes - 65mm

Drive - Air



The Non-Clog Full Flow - 2.5" AODD pump is designed differently to traditional designs of AODD pumps. In place of conventional balls and seats within the suction and discharge manifolds are flaps allowing greater uninterrupted solid passage, allowing the transfer of particles up to 45mm in diameter and 600mm in length.


In traditional designs large solids can get caught between the balls and seats causing pumps to clog. As such choke points do not exist within this design, internal valves can fully open ensuring product can fully flow easily through the unit.


This design is built in glass reinforced Polypropylene with valves in either EPDM, NBR or AISI316 to suit a wide variety of fluids pumped. Such units are used in the waste water treatment industry, ceramic, mining, textile, leather, electroplating and packaging industries where large solids, sometimes of stringy nature can clog units. 


The working principle of the flap valve diaphragm pump means it has a very gentle pumping action making it excellent for handling shear sensitive fluids, whilst allowing passage of large suspended solids. It can self-prime up to 3.5M.


The patented technology in the air motor ensures that the pump will not stall if there is a significant drop in air pressure entering the motor.

Product summary


         Large solid handling capacity – up to 45mm in diameter and 600mm in length. Larger solid handling versions available upon request.

         Available with combined or split suction and delivery

         Casing available in PP,

         Flows up to 530L/min

         Prime up to 3.5M

         Anti stall air motor meaning should the pump encounter a dead head, once the pressure is released the motor will continue to operate as normal. If low air pressure is encountered the pump will continue to function as normal, when operating pressures increase back to normal

         Flaps available in EPDM, NBR, or AISI316

         Long Life Diaphragms

         Suitable for continuous use

         Our AOD Pump design means that it contains up to 60% less parts than conventional designs meaning maintenance is much quicker.




This design does of pump does not contain balls and seats which can trap solids leading to the pump becoming clogged.

Instead it is designed with flap valves, meaning the internal seals allow the full passage of solids which will not be trapped within the pump.
This particular model can handle solids up to 45mm in diameter, and 600mm in length. However at manufacturing stage this can be changed to accommodate your requirements
Yes, absolutely! Due to their unique design, diaphragm pumps can run dry indefinitely. As there is no mechanical seal that requires lubrication and the only pumping component is a rubber diaphragm, the pump can run without fluid for long periods without risk of damage to the internal components or motor.
This means the pump does not need lubricated air to work. Lubricated air is more expensive, oil levels must be frequently checked and the use of oil in air leads to particle emission through the pumps exhaust potentially leading to contaminated product and atmosphere.
Firstly, always check the compatibility of the materials available against the fluid being pumped. The main materials to check are the connections, casing, diaphragms, balls, ball seats and o-ring. It may be that more than one material is suitable for your fluid and selection could be based on the application type. For instance; NBR, Santoprene, EPDM, Hytrel and PTFE are all suitable for water. If it is a simple transfer application, then the most cost-effective material will be best. However, if it involves abrasive solids or there is another variable to consider, then an alternative material may be a better selection.
A pump must be primed in order to operate correctly, this means that the pump casing and inlet pipe must be filled with fluid and the air removed before operation. This needs to be done manually by the pump operator for a non-self-priming pump each time the pump is used to avoid damage from dry running. A self-priming pump removes these issues by completing the priming process automatically. The air is removed from the inlet pipework and pump casing when the pump is activated. Self-priming pumps are particularly useful for installations with a suction lift on the inlet side of the pump, the pump will draw the fluid up the pipework by creating a vacuum and removing any air that is present. In ideal conditions, a self-priming pump can lift fluids up to 6m on the inlet side, however this figure is affected by fluid viscosity, model, pipework bore and other installation conditions, therefore this figure can be much lower from case to case. Allowances must also be made for wear and tear; suction lift capabilities will be much lower for older and worn pumps.
A clear picture of the pump system is required to make an accurate selection. The main pieces of information required include; a description of the application, bore of pipework, the fluid, viscosity, size and type of solids, flow rate and pressure/head. With these pieces of information, a pump can be sized correctly to ensure it delivers the required flow rate and pressure and that is also operates at its best efficiency point to lower lifetime costs. Viscosity is a major factor when selecting the correct size pump. A full speed pump will not transfer high viscosity fluid correctly, whereas a slower speed pump will have a much gentler pumping action. Therefore, oversizing the pump and running it slower will provide much better results. Knowing if the pump is running intermittently or continuously also allows the correct pump to be selected. For instance, a pump running continuously 24/7 will require a larger pump ran slower rather than a smaller pump at full speed. Running the motor slower and oversizing the pump will reduce wear of the pump components, therefore lowering maintenance costs during its lifetime.
ATEX is an abbreviation of “Atmospheres Explosibles”. It is a regulation set out by the European Union to ensure the safety of products that are used to handle flammable products or are installed in environments containing flammable gases, vapours, mists or combustible dusts. For instance, if the pump is being installed in an explosive environment, then only the motor needs to meet the Atex standard, this stops it from causing a spark during operation and igniting the atmosphere. However, if the fluid being pumped is flammable, then the pump will also need to meet Atex standards to ensure that no sparks are caused inside the pump itself when the fluid goes through it. It is crucial that an Atex rated pump or motor are used for applications involving explosive environments or flammable fluids, using a non-Atex pump or motor in these situations is extremely dangerous and contravenes health and safety standards.


Not the tasty chocolate chip kind, but important for you to know - we use cookies to offer you the best experience possible when shopping with us.
Continue to browse if you're happy with our Privacy & Cookie Policy.