How to use micro gear pump and matters needing attention

  • Micro Gear Pump


    A micro gear pump is a small pump that uses a pinion-driven internal gear system. These pumps are ideal for applications requiring high system or differential pressure. They also do not require a dynamic seal, which ensures leak-free operation. Their solid shaft support provides accurate meshing of gears, ensuring smooth operation and high metering accuracy. These pumps have a long service life. They can handle a wide range of pressures.

    Internal gear pumps


    Internal gear pumps are positive displacement pumps with rotating cogs or gears that compress liquid to move it through the pump. The fluid enters the pump through the inlet, where it is contained by the gear teeth and is transferred to the outlet. The pump produces a smooth, pulse-free flow.


    Internal gear pumps are designed with precision tolerances to ensure smooth operation. They can handle pressures up to 3,000 psi and 200 bar. However, they are not well suited to high-temperature or abrasive fluids, and their internal clearances increase with increasing viscosity. Additionally, internal wear can significantly reduce pump efficiency until the point of failure.


    The crescent-shaped seal between the gears prevents the fluid from leaking into the pump and is important for high-viscosity applications. Internal gear pumps are also self-priming and dry-lifting, so that they can run without needing lubrication. However, they should not be run on dry-lift for long periods of time. Gear pumps have a range of applications and can be used to load or unload vessels.


    Compared to external gear pumps, internal gear pumps are better suited for thicker fluids. These pumps also provide accurate flow control, since their output is proportional to their rotational speed. Moreover, their low internal volume makes them extremely accurate. Generally, internal gear pumps are made of stainless steel or cast iron, but newer composite materials make them suitable for corrosive liquids as well.

    Pinion-drive internal gear pumps


    Pinion-drive internal gear pumps are a type of hydraulic pump that features a pinion-driven motor. The pinion is integrated with the transmission shaft, while the driven ring gear has an offset center. The ring gear meshes with the pinion, creating a deep meshing area. This gear drives the pump's rotor, which is supported by the pump's two lateral discs.


    The internal gear pump has several advantages, including compact size, easy serviceability, no trapped oil, low net positive suction head requirements, and high pressure. This type of pump also tolerates small solids and abrasive fluids. These pumps are made of cast iron or steel or lightweight, advanced aluminum alloys. They can be customized with various optional designs.


    The rotation of the gears in the pump draws hydraulic oil into the void, ensuring superior intake. The gears are designed to be closely meshed, which minimizes volume losses and increases efficiency. Moreover, axial plates are used to prevent leakage of pressure fluid while ensuring the pressure chamber is sealed properly.


    The wear rate of a gear pump is dependent on its operating speed and the amount of foreign matter in the liquid. While clean liquids cause less wear on gear pumps, the presence of metal particles can adversely affect their performance. In addition, thin liquids have poor lubricating properties, so they can have negative effects on the wear rate. To mitigate these issues, special materials are available that can increase lubrication and resistance to wear.

    Micro annular gear pumps


    Micro annular gear pumps are ideal for the pumping of light corrosive fluids. They are available in a variety of materials, such as stainless steel and nickel-based ceramic rotors. They are also available with wetted pump housing made of alloy C22 or PEEK(tm). These pumps are widely used for a variety of applications in chemistry and analytical instrumentation.


    This report analyzes the overall Micro Annular Gear Pump market and provides key insights into the growth prospects and competitive scenario. It also includes detailed segmentation by type and application. It also highlights the major players in the Micro Annular Gear Pump market. This report covers the growth strategies of these companies. It also covers the country-wise analysis of the segments.


    Micro annular gear pumps are ideal for continuous dosing applications, as their internal gears are configured eccentrically within the pump casing. This allows the shaft to turn at a constant speed while serving the required number of pulses. As the pump works, the fluid flows into the void between the gears on the inlet side and is trapped by the gears. The liquid then flows around the pump's casing, and finally is discharged on the discharge side.


    Micro annular gear pumps are available in two main configurations: Low Pressure (Series ML) and High Performance (Series MH). The ML series pumps are characterized by high precision rotors and provide tight flow rate control. They can handle flow rates ranging from 0.15 ml/min to 300 ml/min. This pump type also incorporates gear tooth forming technology, which provides a smooth and constant flow.