If you classify pumps in terms of ways to navigate the fluid, we can distinguish 2 types. Centrifugal pumps are pumping fluid through centrifugal force. This method is suitable for use with homogeneous liquids. Displacement pumps move fluid through the displacement of fluid from the main camera in the pipeline due to changes in chamber volume or a mechanical movement. These pumps do not violate underlying structure of the liquid.
Consider pumping equipment bulk-type actions in more detail, breaking into species. Rotary pumps move fluid through a certain movement of rotors, propellers, blades or other details in the pinned case. The presence of the valve is optional. The simplest kind of pump with positive displacement – a gear pump with external meshing gears. Moving the fluid is due changing volumes in the chambers connected by gears with separate drives.
Typically, these pumps are used to working with viscous fluids without other introductions, they are powerful, but cheap. The advantages of gear pumps and include the ability to form a lot of pressure and pump viscous and hot liquids, change the direction of fluid motion. Outs are considered a violation of the internal structure of the liquid, the absence of priming. In gear pump with internal gears the second gear is located inside the main gear of larger size. In these devices creates a greater volume of displacement, so the total pump has a suction capacity. This is a major advantage in comparison with the above view. In the impeller pump wheel with blades spinning in the body, resulting in the displacement of fluid. Such pumps have self-priming ability raises the fluid from a depth of 5 meters, can handle viscous liquids and suspensions, but there are limitations in temperature. In cam pumps fluid is pumped by the rotation of two independent rotors. Such pumps equipment used in the manufacture of beverages, food, medicines. The correct pump economically serve a long time, even works with liquids with large inclusions, gives a smooth flow without the noise and vibrations. The peristaltic pump includes a flexible multi-layer sleeve and rotating shaft with suboccluding rollers. Pump undemanding in operation, is not heated, works with a depth of 9 meters, dispense flow, but has a high value. Screw pump comprises a working part of a pair of rotor-stator, has a simple design, unpretentious, gives a smooth flow of fluid, but wears out and is not used to dry the course.