Implementation of the membrane provides many benefits over piston Pumps and defines specific nature of their application. one amongst the most options - the absence of protection in Pump construction and this permits for usage of diaphragm pumps for operations with mediums, whose escape isn't allowable. These mediums are harmful extremely volatile or explosive. Diaphragm pumps may also simply transfer fluids with solid inclusions. Lubrication of moving components is additionally not necessary and this simplifies service and operation. However, in reference to piston pumps, reduced made pressure and raised wear of operating membrane are main disadvantages of diaphragm pumps.

Diagram of Diaphragm pump operation principle

Screw pump - pumping equipment of positive displacement action, wherever operating cavities area unit created by limiting area between the pump body and rotating part - Screw (conical screw is used during this or many screws. whereas screws area unit rotating, confined area with a transferred medium in it moves from input nozzle to output nozzle and media are transferred by this action.

The screw pump is self-primed, even as the other positive displacement pumps. They take issue with most of the different positive displacement pumps by nearly absent feed non-consistency. as a result of structural options these screws pumps area unit low-noise operative ready to develop substantial head and transfer mediums with solid inclusions while not breaking these inclusions. The combination of screw pump's options provides their productive application in many areas, like food, chemical, petrochemical etc. Production of those pumps is pricey and involves several technical issues however, in most cases, their effectiveness outweighs these disadvantages.