Pumps can be distinguished by type depending on how the movement of fluid. Thus we can distinguish two main types of pumps: circulating (centrifugal) and volume action. Circulating pumps are movement of fluid through centrifugal force. Pumps that move fluids using this method are called centrifugal pumps. This solution is suitable for moving homogeneous liquids. Pumping equipment volume Use of the forced displacement of the moving portions of fluid from the working chamber in the discharge line, by changing the working volume of the chamber or the mechanical movement of portions of the liquid. Pumps that work on this principle, called volumetric pump action.
Pumps volumetric action does not violate the structure of the fluid. Rotary pump Rotary pump – the general name of forced displacement pumps, which move the fluid motion of rotors, cams / wedges, screws, blades / vanes or similar parts in a fixed housing. Usually necessary in the intake / intake and exhaust valve no. Gear pumps external engagement gear The simplest type of pump with positive displacement, which is caused by a change in the volume of voids between a gears coupled with independent drives. The pump is powerful and inexpensive. In main gear pumps pumping viscous liquids without inclusions. It is necessary that the liquid wets the material of the working chamber and gears. You also need to pay attention to when selecting the type of mechanical seal, which is adjusted for characteristics of the fluid.
