Once the chemical is located in the guide, it is rated according to which wetted pump and elastomer materials are most or least compatible or not to be used. In some cases, there are conditions included in the rating such as maximum temperature or concentration that the material is still compatible. A rating of A/65 degrees means that the material is compatible up to 65 C or a rating of A/70 percent means the material is compatible up to 70 percent chemical concentration and after that temperature or concentration is exceeded, the compatibility changes. It is always recommended that only A-rated materials with no conditions called out be selected.

AODD pumps market is projected to witness robust demand during the forecast period, owing to the steady growth in construction, energy, wastewater treatment, mining, agriculture and various other manufacturing industries. The global AODD pumps market is estimated to grow at a CAGR of 4.8% during the forecast period.

Once the chemical has been determined, it is identified in the AODD manufacturer’s Chemical Compatibility Guide. It is important to remember to use the guide from the AODD OEM brand from where you will be acquiring the pump. Although the guides may look similar and often cover the same range of chemicals, some OEMs offer different grades of metals or plastics. Some are proprietary to them and may not be equally compatible with the chemicals in the process.

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Because of the wide range of chemicals that AODDs can pump, it is imperative to select the right materials of construction for the specific chemistry involved in the process. Misdiagnosed pump configuration can cause more than maintenance and process interruption; it can be a safety issue. Even household chemicals can be dangerous if exposed to a team member when fluids are transferred in the chemical process of diluting them to consumer concentration.

Energy costs for the pump comes from the consumption of the compressed air required to power the pump. Since compressed air is a relatively costly utility in many plants, requiring compressors and air distribution systems, this represents the main running cost for an AODD pump. However, AODD pumps can be used in locations where either electricity simply isn’t available or in hazardous areas where electrical supplies are restricted. This enables AODD pumps greater flexibility over centrifugal and positive displacement pumps.

9. Global AODD Pumps Market Analysis 2013-2017 and Forecast 2018-2028, by Material of Construction  9.1. Introduction / Key Findings 9.2. Historical Market Size (US$ Mn) and Volume Analysis By Material of Construction, 2013 – 2017 9.3. Current and Future Market Size (US$ Mn) and Volume Analysis and Forecast By Material of Construction, 2018 – 2018 9.3.1. PP (Polypropylene) 9.3.2. PVDF (PolyVinylidene Fluoride) 9.3.3. SS (Stainless Steel) 9.3.4. Aluminium 9.4. Market Attractiveness Analysis By Material of Construction

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At the same time, diaphragm B compresses the volume in its chamber, which closes valve 3 and forces fluid past valve 4 and out through the outlet port (‘O’). When the air valve reverses the movement of the diaphragms, fluid is pumped via the left hand side of the pump. The diaphragms are clamped to the walls of the pumping chamber so there are no sliding seals in the pump. The diagram shows the flow of liquid from the bottom to the top, however alternative designs allow liquid to flow from the top to the bottom of the pump or even through the centre of the pump, which can lead to smoother flows.

Because of these factors, understanding viscosity is critically important when determining how to size a pump and the diameter of the pipeline to use. To better understand, see Table 1 above, which illustrates the degree of viscosity (measured in centipoise) for several materials.

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At the same time, diaphragm B compresses the volume in its chamber, which closes valve 3 and forces fluid past valve 4 and out through the outlet port (‘O’). When the air valve reverses the movement of the diaphragms, fluid is pumped via the left-hand side of the pump. The diaphragms are clamped to the walls of the pumping chamber so there are no sliding seals in the pump. The diagram shows the flow of liquid from the bottom to the top, but alternative designs allow liquid to flow from the top to the bottom of the pump, or even through the centre of the pump, which can lead to smoother flows.