Pumps are mechanical devices used to move liquids or gases from one place to another they create flow by increasing the pressure of a liquid or gas and can be used in a variety of industries there are many types of pumps including centrifugal piston diaphragm gear and screw pumps each type of pump has its own unique characteristics and is suitable for certain applications pumps can be made of different materials depending on the purpose and chemical composition of the fluid being pumped they can be