• Rotor and stator pumps are widely used in industries due to their reliability and versatility. As one of the leading rotor and stator pump manufacturers in China, Mingjie Pump has deep understanding of these pumps. This article will introduce some common types of rotor and stator pumps and their applications.

    Progressive Cavity Pumps

    Progressive cavity pumps, also known as progressing cavity pumps, are one of the most common types of rotor and stator pumps. They are typically used for pumping fluid with low to medium viscosity. As shown in the picture below, progressive cavity pumps use a helical rotor that rotates inside a double helical stator.

    Progressive cavity pumps offer advantages such as self-priming, ability to handle solids, and smooth pulse-free flow. They are widely applied in oil & gas production, chemical, food & beverage, and other industries. However, the progressive cavity pump stator material is also prone to damage due to long-term operation.

    Gear Pumps

    Gear pumps are another common type of rotor and stator pumps. Different from progressive cavity pumps, gear pumps use a set of meshing gears to pump fluid. The gears rotate and fluid is moved from one space between teeth to the next. Gear pumps are suitable for high viscosity fluids and often used in automobile, marine and industrial applications.

    Screw Pumps

    Screw pumps, also called twin-screw pumps, are a type of positive displacement rotor and stator pumps that use a pair of intermeshing rotors to pump fluid. As the rotors rotate, they create cavities that draw fluid and transport it to the discharge side. Screw pumps are self-priming and work well for low to medium viscosity fluids. They have wide application in wastewater treatment, chemical, food processing and other industries.

    Lobe Pumps

    Lobe pumps utilize a set of rotating lobed rotors inside a lobed cavity of the stator to pump fluids. During operation, the rotors mesh with the stator to create seals that guide the fluid through the pump. Lobe pumps are suitable for low to medium viscosity fluids and often applied in pump stations, chemical dosing, and wash down systems.

    Comparison of Common Rotor and Stator Pumps

    To better understand the characteristics of different rotor and stator pumps, we can compare them in the following table:

    In summary, rotor and stator pumps have various configurations but share the similar working principle of using rotating parts and stationary parts to pump fluids. Their applications depend on factors like flow rate, pressure, viscosity of handled fluids. Proper selection and maintenance can ensure long service life of rotor and stator pumps.

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