Global pumps have recently added a new video to their increasing repertoire of useful information for pump users
These graphs describe the relationship between the pressure/flow of the liquid being pumped and the pressure/flow of the compressed air required for pumping. If you have an AOD pump, then this video will teach you how to determine how much air pressure and air flow you will need to operate your pump at a specific duty point (described in terms of the liquid flow rate and discharge pressure of the pump). Alternatively, given the air supply pressure and process fluid flow rate, the information allows you to determine the airflow and liquid discharge pressure from the pump described. The video is concise and straightforward, outlining the important features of the AOD pump curve and explaining the information it contains with colour-coded graphics and easy to understand narrative.

If you already have experience reading this type of graph, this video will refresh your memory, if not, then viewing the video will make it easy to interpret the curves found on an AOD pump performance graph. Additionally, the video explains how to interpolate between the curves in case your duty point does not fall exactly on one of the predetermined curves. This information is specific for a given pump and allows the user to determine whether the pump will be adequately sized for their use.

You can view the video here: How to read an air operated diaphragm pump curve

AOD pumps are used in a wide range of industrial sectors including food and beverage, pharmaceutical, electronics and paint/coatings. They can be manufactured from a variety of materials to match the desired application, can run dry without damage, have air valves that do not require any lubrication and are extremely easy to maintain and operate. AOD pumps are ideal to pump abrasive, viscous, or corrosive substances (e.g. diatomaceous earth slurries, molassas, etching acids). Their design minimizes fluid waste and reduces risk of employee exposure. Because they are air-operated, they can be used in remote locations, where there is no electrical supply, and in most cases are submersible since there is no electrical hazard. Models with flow rates from 0.1 up to 1000 litres/min are available.

Global Pumps is an Adelaide based company founded in 1977 to fulfill the need for a versatile and service oriented specialist supplier sourcing pumps and pumping systems from around the globe. Global Pumps delivers complete solutions for customers located throughout Australia and New Zealand, including a technical service division that performs onsite installations and servicing.