Pump

A pump is a device to move gases, liquids, slurries. A pump moves liquids or gases from lower pressure to higher pressure and overcomes this differences in pressure by adding energy to the system (E.g. such as water to the system). The service liquid has the task of compressing the gas to be conveyed, sealing off the various discharge chambers from each other, lubricating the shaft seals and absorbing the compression energy as heat. A gas pump is normally called compressor, except in very low pressure application, like heating, ventillating, or air conditioning where the operative equipment consists of fans or blowers.
Pumps works by using mechanical forces to pushthe material, either by physically lifting or by force of compression