There are different types of positive displacement pumps. Among them, the gear pump is one of them. This type of pump transfer the fluids through the action of rotating cogs or gears. It creates a suction at the pump inlet with the help of rotating gears as they develop a liquid seal with the pump casing. Before discharging the fluid, it is enclosed within the teeth of rotating gears. If you want a smooth, pulse-free flow which is proportional to the rotation speed, gear pumps are the appropriate choice.
Micro gear pumps
Micro gear pumps work by providing pulse-less flow at moderate to high pressures (depending on the application and needs), along with offering extra advantage of contamination and leak-free pumping. However, there are some gear pumps that come with mechanical shaft gears which are coupled with magnetic pumps without seals. Thus, eliminating frictional wear formed from heat which is the primary cause of leaks and contamination. There are different high-flow, low-flow and standard pump heads which are compatible for a number of pumps. These are available in pressure loaded and cavity-style models. A micro pump is the perfect choice for a number of industrial applications where a small amount of fluid is needed during the manufacturing process.
Cavity style pump heads
The fluid pressure in the magnetic cup maintains a tight seal between the gear teeth and this is determined by the cavity style pump heads. This type of pump head is suitable for applications that require cycling, suction lift, or pressurized inlet.
Pressure loaded pump heads
Pressure loaded pump heads come with a suction shoe which is positioned around the inlet. The intense pressure in the magnetic cup on the inlet side holds the suction shoe and gears tightly in their place. The design automatically increases the volumetric accuracy that further ensures perfect fluid transfer without return flow or leakage between the gear tips. Pressure loaded pump heads are ideal to increase the efficiency of the pump while enhancing the discharge pressure. This type of pump head is used for applications that require high initial differential pressures and precise flow rates.
Different types of micro pump :
Diaphragm micropump: uses repeated actuation with the help of a membrane to drive the fluid.
Peristaltic micropump: have three microvalves that open and close one after another to draw the fluid.
A microfluid keeps changing its physical law. Thus, to handle such fluids, micro pumps are highly recommended for industrial purposes.