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Top 4 types of Pumps


4 Reasons to use AODD



1) The Importance of Air
As their name states, the operation of AODD pump relies on compressed air, which can be found in most chemical-processing plants around the world. Leveraging this ready availability of air can make the AODD pump a true plug-and-play device that requires no infrastructure upgrades to incorporate.
2) Low Maintenance Costs Through Proper Diaphragm Selection
Diaphragm pumps have a unique benefit when compared to many rotating-pump technologies in that they don’t require any seals. Elimination of the need for packing or expensive mechanical seals means that maintenance costs tend to be inexpensive and infrequent. Combined with the ease of operation, AODDs are a true “set-and-forget” type of pump, provided the right diaphragms are selected for the application.
3) Versatile and Compatible
By definition, chemical processing requires the completion of some of the most intricate and complex industrial operations in the world. One of the most crucial operations is the transfer of liquids along the production chain. Due to the importance of the many fluid-transfer operations along the breadth of the chemical-manufacturing chain, facility operators need to identify the best pumping technology for the job.
4) Pump Construction
Quality pump construction is key when handling dangerous chemicals, and using a pump designed with the right materials is important to the safety of a plant. To satisfy these demands, AODD pump are available in a wide range of materials of construction in order to meet a variety of chemical-handling needs. Common chemical-pump materials include polypropylene, Kynar®, stainless steel, ductile iron and Hastelloy, with some companies, like Wilden, possessing the capability to offer special materials like super duplex when really unique materials are required to ensure uninterrupted production processes and the safety of plant personnel.

Air operated diaphragm pump



Air operated diaphragm pumps (also known as pneumatic diaphragm pumps, AODD pumps, AOD pumps) are used for endless applications in mining, industrial and general plant service.
Jim Wilden invented the first air-operated double-diaphragm pump in 1955, and are designed for demanding applications that require a robust design. They are extremely reliable, easy to maintain and offered in a variety of configurations and materials to meet your pumping needs. They are extremely reliable, easy to maintain and offered in a variety of configurations and materials. Air Operated Diaphragm Pumps are often used where electricity isn’t available, or in explosive or flammable areas. They are also used for chemical transfer, de-watering underground coal mines, food manufacturing or where the liquid being pumped has a high solids content or high viscosity.

Diaphragm pump


A diaphragm pump is a positive displacement pump that uses a combination of reciprocating action and either a flapper valve or a ball valve to transfer liquids. This pump is sometimes referred to as a membrane pump. Diaphragm pumps are self priming and are ideal for viscous liquids. Most models are available in electric, engine, manual, air operated or hydraulic configurations.


Positive displacement pump 9 facts



1. Positive displacement pumps can be used when a constant flow rate is required.
2. These pumps should never be operated with a closed valve. This is because unlike centrifugal pumps, they don't have shutoff heads and continue to pump. This can cause a discharge line to develop leaks or even burst.
3. An internal or external safety valve should be installed on the discharge end when using these pumps to prevent damage.
4. Positive displacement pumps are best suited for applications that demand only moderate flow and pressure rates.
5. The rotary type of positive displacement pumps are highly efficient, but are not suitable for high flow rate applications. The revolutions per minute (RPM) can be increased to step up the flow rate, but this will eventually wear down the rotary mechanism, increasing the clearance between the rotor and the side walls, thereby decreasing efficiency.
6. Similar to centrifugal pumps, positive displacement pumps are not self-priming.
7. Unlike most centrifugal pumps, however, positive displacement pumps can get rid of trapped air in the system on their own.
8. However, these pumps can only operate when the pressure at the inflow end provides the minimum pressure required by a unit. This is also required to get rid of any trapped air.
9. These pumps are best suited to handle high-viscosity fluids.

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