Unlike an AODD pump, which works with compressed air, an EODD (Electrically Operated Double Diaphragm) pump works with an electric motor. An EODD pump is like any other double-diaphragm pump, but it offers a host of extra features. With a large built-in suppression, it is capable of handling any sudden changes in pressure. Not just that, in case there is some resistance, it can continue to work by stalling against back pressure.
EODD pumps have two diaphragms that move back and forth, enabling the fluid to move. These pumps can handle heavy-duty applications with surge suppression or back pressure resistance. As opposed to an EODD pump, a negative suction pump doesn’t need manual priming before operation. This means a negative suction pump creates a pressure differential that forces the liquid to move into the pump chamber. Even if air or vapour is not completely cleared out, negative suction pumps can draw fluid into the system.
One must also distinguish EODD pumps from Positive Displacement (PD) pumps. PD pumps use various pumping mechanisms, including but not limited to an external circumferential piston, a rotary lobe, a twin screw, a quaternary diaphragm, a gear, a plunger, and a progressive cavity.
To understand the various kinds of PD pumps, one must understand their capacity to transport a particular volume of fluid every revolution. To move the fluid, at the pump inlet, an expanding cavity produces a low-pressure area where fluid may be drawn in; when the motor turns, the cavities collapse, pressurising the fluid and forcing it out the discharge.
If you are in an industry that handles high-viscosity fluids as well as metering and dosing applications, PD pumps are a good choice for you. However, they are typically very expensive. This is why it is essential to consider technologically advanced options such as EODD pumps.
What are the advantages of Electrically Operated Double-Diaphragm pumps?
Offers full control: The electronic control allows the operator to adjust its settings easily. When using EODD pumps, just by increasing or decreasing the speed of the motor, one can control the flow rate.Versatility: You can customise EODD pumps by choosing the right material for different purposes. These pumps are capable of handling all sorts of materials, such as high solids, abrasives, or even highly concentrated caustic chemicals.
Superb performance: EODD pumps are well-known to handle a large number of high-volume applications. And since they offer a range of flow rates, they can be used by different kinds of industries.
Energy-efficient pumps: Higher energy consumption is one of the biggest challenges industries that rely on regular double-diaphragm pumps face. In the past, AODD pumps relied on compressed air as a power source, and the compressors used to compress the air needed a lot of energy. With an EODD pump, you opt for low pulsation even when you do not own pulsation dampeners, and that helps you save energy.
Compact design: One of the best parts of modern designs is the emphasis on developing compact products, and EODD pumps clearly benefit from this emphasis. As compared to other pumps, EODD pumps take up less space and yet offer similar performance and capacity. For operators who work in comparatively smaller areas, EODD pumps make a lot of sense. But don’t be fooled by their size. EODD pumps may look small and compact, but when it comes to performance, they pack a punch. When you buy a good-quality EODD pump, there is every chance it will work as well as two pumps.
Easy maintenance: Owing to their compact design, one can expect less wear and tear when using EODD pumps. Even when working with highly abrasive applications like lime slurry, for example, these pumps have displayed superior performance compared to other kinds of pumps.
Cognito EODD Pumps by IDEX
Leveraging over 30 years of experience in design and engineering, IDEX India has made the Cognito TM EODD pump handle really tough fluids. Featuring a robust design, superb efficiency, and excellent performance, these EODD pumps offer much more than other contemporary EODD pumps.Industries that can benefit from Cognito TM EODD pumps include Ceramic and sanitary ware, tableware and insulators, pulp and paper, water and wastewater treatment, and Filter presses. As far as applications of Cognito TM EODD pumps are concerned, they include slurry transfer, filter press feeding, sludge transfer, effluent transfer, and loading and unloading of equilization tanks.
With Cognito TM EODD pumps, you can remotely monitor the performance of pumps and even plan your maintenance in advance, avoiding any unexpected leakage or even shut-offs. These pumps also allow you to maintain line pressure at a set value, bringing energy consumption down.