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- sales@numaticpumps.com
- Mumbai, Maharashtra, INDIA
Numatic Pumps is a leading manufacturer and supplier of AODD Pumps in India, offering reliable Air Operated Double Diaphragm Pumps for chemical, pharmaceutical, industrial, mining, food processing, wastewater treatment, and other demanding applications.
Our AODD pumps range is designed for efficient and safe transfer of corrosive, abrasive, viscous, and hazardous fluids. We manufacture and supply AODD pumps in PP, PVDF, stainless steel 316, and aluminium, with different sizes and configurations to meet specific industrial requirements.
Looking for a reliable AODD pump manufacturer in India? Contact Numatic Pumps for the right pump for your application.
We have a complete range of AODD pumps in comparison to material and size. Our range of air-operated double diaphragm pumps includes PP AODD pumps, PVDF AODD pumps, SS AODD pumps, and aluminium pumps. Thinking of AODD Pumps, we have all sizes from 0.5” to 3”.
We are one of the Air-Operated Double Diaphragm (AODD) pumps, offering innovative pumping solutions across industries including chemical, pharmaceutical, mining, food & beverage, and wastewater treatment. With years of experience and a commitment to quality, we design and manufacture pumps that are built to last, perform under pressure, and meet global standards.
Pneumatic diaphragm pumps, also called Air Operated Double Diaphragm (AODD) pumps, are widely used for transferring liquids where compressed-air operation, self-priming and flexible fluid handling are required.
Compressed air powers a positive displacement pump called an AODD (Air Operated Double Diaphragm Pump). Liquid is moved from the suction side to the discharge side by means of two flexible diaphragms that alternate in operation.
AODD pumps are especially helpful for applications involving flammable, toxic, corrosive, abrasive, or shear-sensitive fluids since they run on compressed air instead of an electric motor.
AODD pumps are also frequently referred to as:
Air-Powered Diaphragm Pumps
Pumps with Air Diaphragms
Pumps with Two Diaphragms
Diaphragmatic Pneumatic Pumps
Air-Driven Diaphragm Pumps (AOD)
An AODD pump works through the reciprocating movement of two diaphragms.
1. Compressed air enters the air distribution system.
2. The air moves one diaphragm outward.
3. This creates suction in one pumping chamber and draws liquid into the chamber.
4. At the same time, liquid is discharged from the opposite chamber.
5. The air valve shifts the compressed air to the other side.
6. The second diaphragm then performs the pumping stroke.
7. This alternating action produces continuous fluid transfer.
8. The flow can generally be controlled by adjusting the compressed-air supply and discharge conditions.
The pump material should be selected according to the liquid being handled.
The AODD pumps are virtually leak-free. Leakage will occur only if one or both diaphragms fail, since the wetted parts are sealed from the surrounding environment by stationary seals. A general maintenance programmer, such as regular diaphragm replacement, should follow the manufacturer’s recommendations. The supply of compressed air has the advantage of pressure balancing, which reduces the wear of the diaphragm in comparison to a diaphragm pump driven mechanically.
AODD pumps can manage abrasive, high viscosity fluids as well as sludges and slurries. Also, they are very good for shear sensitive fluids due to the gentle pumping action. The four internal check valves are generally made with a ball (or cone)/seat or a flap. Ball valves provide a better seal and are less susceptible to wear than flap valves. Flap-type valves are hinged and fatigue at the flexing point with long use. Ball valves are less prone to wear because the ball rotates freely as it works and can find another position on the seat. The advantage of flap type check valves is that they can pass large solids suspended in the pumped fluid more readily.
An AODD pump can be run dry indefinitely because there are no internal seals or moving parts that need lubrication or cooling. AODD pumps are self-priming and some can have a suction lift up to 8m.
AODD pumps are air powered rather than electric so they are suitable for use in hazardous areas. An AODD pump can be safely submerged as long as the air vent is above the liquid level.
AODD pumps have a high suction lift, are self-priming in most fluids, and can run dry. These pumps can easily handle low to medium viscosity fluids (including those with large suspended solids) and can pump both corrosive and flammable liquids. In the processing industries, it is said that if a material can be poured into an AODD pump, these pumps can generally pump it.
AODD pumps are relatively inexpensive to purchase and operate due to their simple design, and when combined with their efficiency and accuracy, stainless steel versions are well suited for certain food grade sanitary processing applications such as filling, dispensing, and metering fluids, as well as water removal.
The diaphragm pump market is estimated to grow at a CAGR of more than 6.1% between 2022 and 2025. The COVID-19 pandemic has had a detrimental influence on the growth of the air operated diaphragm pump industry, as the industrial sector saw a major drop in demand for AODD Pumps during the pandemic, resulting in lockdowns. During 2022 and 2023, smaller firms and organizations with relatively poor financial positions were shut down, lowering overall industrial AODD Pumps manufacturing capacity and consolidating the consumer sectors. Furthermore, as demand for oil and gas grows, oil prices recover, and an increasing number of onshore and offshore fields reach maturity, exploration and production activities are expected to shift to deeper offshore regions, increasing offshore ultra-deepwater projects.
AODD pumps are air-powered displacement pumps that are distinct from all other positive-displacement pumps. While pumping, the diaphragm is balanced due to air pressure acting on the full surface of the diaphragm. This significantly increases diaphragm life over mechanically driven diaphragm pumps. Because compressed air is restricted, the pump’s maximum pressure is likewise safely limited. As a result, Air Operated Double Diaphragm pumps are ideal for an on-off cycle, on-demand intermittent, and continuous operation needs.
The AODD pump’s basic genius implies that there are just a few dynamic wetted parts: the two diaphragms joined by a common shaft, the two intake valve balls, and the two output valve balls. The diaphragms serve as a barrier between the compressed air source and the liquid. Driving the diaphragms with compressed air rather than the shaft balances the strain on the diaphragm, eliminating mechanical stress and extending diaphragm life. This also permits the valve balls on the valve seats to open and close, directing liquid flow. Because of its simple design and operation, it is simple for the operator to identify the proper pressures and flows to maximize its functioning.
India has a robust market for Air Operated Double Diaphragm pumps (AODD Pumps), ranging from global multinational corporations with manufacturing facilities in India to strong homegrown brands.
Here is a breakdown of the top AODD pump manufacturers and suppliers in India, categorised by their market position:
1. Numatic Pumps (Manufacturing/Assembled in India)
These companies are considered the “gold standard” for AODD technology. They are more expensive but offer high reliability and extensive R&D.
2. Unico Pumps
Unico Pumps is perhaps the most recognised AODD brand in India. They have a massive manufacturing and service facility in Mumbai. They are known for their “Bolted” design and “Evolution” series.
3. Kenly Plastochem
Kenly invented the AODD pump and has a strong presence in India (headquartered in Gujarat & Mumbai). They are widely used in the oil & gas and chemical sectors. Known for high-quality industrial pumps, especially in the paint, coating, and food processing industries. They have a strong distribution network across India. We are famous for our “Solid Block” PP and PVDF pumps, which are highly resistant to aggressive chemicals. We are very active in the Indian pharmaceutical and wastewater treatment markets
Numatic Pumps and Unico Pumps companies offer high-quality pumps designed for Indian industrial conditions, often at a more competitive price point than the global brands.
We are one of India’s leading industrial pump manufacturers. We produce high-performance AODD pumps used extensively in the paper, pulp, and chemical industries.
We are major manufacturer of AODD pumps specifically designed for corrosive chemical handling. We specialise in non-metallic AODD pumps (Polypropylene, PVDF, Antistatic). They are a go-to for the dyes and intermediate chemical industries. We are a well-known domestic brand providing cost-effective and rugged AODD solutions for general industrial applications.
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