Since its invention in 1955 as a mining pump, Wilden's air-operated double diaphragm pneumatic pump (AODD) and distributed by Fluid Technique, has earned a huge reputation as the ideal technology for utilitarian, auxiliary or basic handling applications and liquid transfer AODD pumps stand out in this type of applications because they have design features that allow them to offer a simple operation, without mechanical seals, possibility of self-priming, dry function, achieve a suction lift of up to 9 meters, resist head pumping conditions dead, operate while submerged and pass solids up to 76 mm in diameter.
Companies did not take long to realize the advantages of these operational features in many process applications and why AODD pumps are true “process” pumps capable of operating efficiently, reliably and safely in a wide range of applications. critics. AODD pumps also reach the optimum point of operation in many of the fluid handling tasks that prevail in the chemical processing industry.
There are four key areas where AODD pumps often outperform other technologies in terms of efficient, reliable and cost-effective operation.
There are four key areas where AODD pumps often outperform other technologies in terms of efficient, reliable and cost-effective operation.
Chemical plants that obtain to optimize their operations ought to contemplate the benefits that AODD pumps will give in numerous areas.
1. The importance of air
As the name implies, the operation of AODD pumps is based on compressed air, which can be found in most chemical processing plants around the world. Taking advantage of this air can make the AODD pump a plug-and-play device that does not require infrastructure updates. In addition, the use of air to drive the pump is the key source of one of its most coveted capabilities: the ability to stop the feed without damaging the pump, system or fluid. This makes AODD pumps easy and flexible to operate.
While plastic pumps are typically a pumping technology for chemical processes, there may be cases where metal pumps are a better option for the operator. (Images courtesy of Wilden)
Keeping air use low is critical for a healthy plant environment, and recent technological advances have taken significant steps toward achieving these goals. Advances have focused on a deficiency in the operation of the AODD pump. At the end of each pump stroke, a small amount of air is consumed that does not contribute to fluid movement. Imagine stepping on the accelerator in a vehicle that is on the ice; The wheels turn, but the car does not move.
Our redesigned air distribution system solves this problem with an air control reel that reduces the amount of air allowed in the pump at the end of the run, which reduces the amount of wasted energy that would traditionally have been lost in the atmosphere.
This allows the AODD pump to obtain savings of up to 60% in air consumption, improves the suction-lift capacity of the pump and allows the pump to better handle high inlet pressures, while providing more performance per cubic meters per hour (m 3 / h) of air consumed than AODDs that have traditional air distribution technology.
Keeping air use low is critical for a healthy plant environment, and recent technological advances have taken significant steps toward achieving these goals. Advances have focused on a deficiency in the operation of the AODD pump. At the end of each pump stroke, a small amount of air is consumed that does not contribute to fluid movement. Imagine stepping on the accelerator in a vehicle that is on the ice; The wheels turn, but the car does not move.
Our redesigned air distribution system solves this problem with an air control reel that reduces the amount of air allowed in the pump at the end of the run, which reduces the amount of wasted energy that would traditionally have been lost in the atmosphere.
This allows the AODD pump to obtain savings of up to 60% in air consumption, improves the suction-lift capacity of the pump and allows the pump to better handle high inlet pressures, while providing more performance per cubic meters per hour (m 3 / h) of air consumed than AODDs that have traditional air distribution technology.
2. Low maintenance costs thanks to proper diaphragm selection
Diaphragm pumps have a unique benefit when compared to many rotary pump technologies, they do not require any seals. Eliminating the need for gaskets or mechanical seals means that maintenance costs tend to be cheap and infrequent. Combined with ease of operation, AODDs are a type of “set-and-forget” pump, as long as the appropriate diaphragms are selected for the application. The choice of diaphragm material, the shape, and design of the pump play an important role.
Along with the advances in the design and operation of air distribution, the improvements made in the construction and function of the diaphragm over the years have been significant. The main one is that long-lasting diaphragms (designed for use in chemical processing activities) require less maintenance, which reduces repair costs. Antlia works provides the best quality of AODD Pump and Hose Pump. A piston diaphragm pump has an outer piston that is fully encapsulated within the thermoplastic elastomer (TPE) material of the diaphragm, which provides several advantages. First, the design eliminates the phenomenon known as external abrasion of the piston, which is when the external piston rubs against the diaphragm as it circulates and over time, such as sandpaper, wears out the material. Removal of the outer piston eliminates this failure mode, dramatically increasing the life of the diaphragm. Second, it also eliminates a known leakage point in traditional diaphragm designs around the outer piston, improving overall safety when handling hazardous chemicals. Finally,
In the end, the period and maintenance that unplanned failures might incur ar usually costlier for the ability operator than the spare components necessary to stay the AODD pump running.
The use of these new designs allows the pump to run longer before requiring diaphragm maintenance and translates directly into a healthier end result.
3. Versatility and compatibility
By definition, chemical processing requires the performance of some of the most complex industrial operations in the world. One of the most important operations is the transfer of liquids along the production chain.
Because of the importance of numerous fluid transfer operations throughout the chemical manufacturing chain, facility operators need to identify the best pumping technology for the job. Technology must possess the versatility necessary to function reliably and efficiently at any number of points in the production hierarchy.
AODD pumps can give a variety of operational advantages:
They are suitable for use with high viscosity fluids and can handle fluids ranging from liquids similar to water to liquids of medium and very high viscosity.
They can run dry and strip the discharge lines without being damaged. If the pressures become too high, the pump will simply stop working, but will not break.
They are simple devices and their control is based solely on solenoid operators, pump cycle counters and surge absorber sets.
Their operating costs may be lower when all maintenance, accessories, and controllers are included, and in many cases, their total cost of ownership is lower throughout their useful life compared to competing pump styles.
A newly developed air control reel eliminates costly air loss at the end of the pump stroke, resulting in savings of up to 60 percent on air consumption compared to models in the competition.
In addition, some of the AODD pump styles have been designed to be direct bolt-to-bolt and pipe-to-pipe replacements in existing pumping systems.
In addition, some of the AODD pump styles have been designed to be direct bolt-to-bolt and pipe-to-pipe replacements in existing pumping systems.
This makes AODD pump designs a cheap thanks to improve fluid transfer performance whereas realizing the advantages inherent within the operation of associate degree AODD pump that has a sophisticated
air distribution system. These benefits include reduction of air consumption and expenses, optimization of handling and containment of products, and reduction of maintenance and replacement costs.
Finally, the design and operation of AODD pumps allows them to transfer a wide range of liquids with different handling characteristics. One of the most prominent is the viscosity or the thickness of the liquid being transferred. The operation of AODD pumps virtually eliminates product slippage, regardless of the viscosity of the fluid, since the pump's ball check valves control fluid transfer. In contrast, gear pump, screw and lobe technologies use fixed tolerances to control slippage, which means they are less likely to adjust properly to viscosity changes.
Finally, the design and operation of AODD pumps allows them to transfer a wide range of liquids with different handling characteristics. One of the most prominent is the viscosity or the thickness of the liquid being transferred. The operation of AODD pumps virtually eliminates product slippage, regardless of the viscosity of the fluid, since the pump's ball check valves control fluid transfer. In contrast, gear pump, screw and lobe technologies use fixed tolerances to control slippage, which means they are less likely to adjust properly to viscosity changes.
A diaphragm is designed with a piston that is integrated into the diaphragm itself. The result is that, unlike conventional diaphragms, this diaphragm has no external abrasion of the piston, which is a key mode of failure for conventional diaphragms and eliminates a potential point of leakage around the external piston. This means an improved diaphragm lifespan and peace of mind when handling dangerous liquids.
4. Pump construction
The quality of the construction of the pump is key when handling dangerous chemicals, and the use of a pump designed with the right materials is important for the safety of a plant. To meet these demands, AODD pumps are available in a wide range of building materials to meet a variety of chemical handling needs. Common materials for chemical pumps include polypropylene, Kynar, stainless steel, ductile iron and Hastelloy, and some companies have the ability to offer special materials such as super duplex when really unique materials are required to ensure uninterrupted production processes and safety. of the plant staff.
If metal pumps are required, a material that is overlooked in the world of chemical processes is ductile iron, which works well in application ranges from 4 to 10 both acidic and basic pH. Provided that the chemical compatibility is correct, operators who use ductile iron pumps can obtain all the benefits of stainless steel, but at a lower purchase cost.
A screwed design does not depend, as mentioned above, on gaskets or expensive mechanical seals to prevent leaks. In this case, the most important benefit of bolted pumps is their ability to offer one of the highest levels of product containment. This is critical for two main reasons: many raw or finished chemicals are high-value products and any loss through leaks can be detrimental to the end result of the operation and, secondly, most of the chemicals can be harmful to humans and the environment.
Go-To Technology
Thanks to its simple but innovative design, the AODD pump has proven to be able to consistently meet the demands of chemical processors while building a reputation as a “go-to” pumping technology where basic transfer capabilities are required of fluids The AODD pump, which has a stability of remarkable operating characteristics, has become a technology of first choice for chemical manufacturers who are looking for a pump that mimics cost-conscious air consumption with reliable production rates.
4. Pump construction
The quality of the construction of the pump is key when handling dangerous chemicals, and the use of a pump designed with the right materials is important for the safety of a plant. To meet these demands, AODD pumps are available in a wide range of building materials to meet a variety of chemical handling needs. Common materials for chemical pumps include polypropylene, Kynar, stainless steel, ductile iron and Hastelloy, and some companies have the ability to offer special materials such as super duplex when really unique materials are required to ensure uninterrupted production processes and safety. of the plant staff.
If metal pumps are required, a material that is overlooked in the world of chemical processes is ductile iron, which works well in application ranges from 4 to 10 both acidic and basic pH. Provided that the chemical compatibility is correct, operators who use ductile iron pumps can obtain all the benefits of stainless steel, but at a lower purchase cost.
A screwed design does not depend, as mentioned above, on gaskets or expensive mechanical seals to prevent leaks. In this case, the most important benefit of bolted pumps is their ability to offer one of the highest levels of product containment. This is critical for two main reasons: many raw or finished chemicals are high-value products and any loss through leaks can be detrimental to the end result of the operation and, secondly, most of the chemicals can be harmful to humans and the environment.
Go-To Technology
Thanks to its simple but innovative design, the AODD pump has proven to be able to consistently meet the demands of chemical processors while building a reputation as a “go-to” pumping technology where basic transfer capabilities are required of fluids The AODD pump, which has a stability of remarkable operating characteristics, has become a technology of first choice for chemical manufacturers who are looking for a pump that mimics cost-conscious air consumption with reliable production rates.
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