What is the typical viscosity range for progressive cavity pumps?

  • IntroductionProgressive cavity pumps are positive displacement pumps that can handle fluids with a wide range of viscosities. Understanding the typical progressive cavity pump viscosity range is important when selecting a pump for different applications.Typical Viscosity Range

    The typical

    • for most progressive cavity pumps is between 50-1,000,000 centipoise (cP). To put this into perspective:Water has a viscosity of about 1 cP.
    • Oil varies but is generally around 100-10,000 cP.
    • Thick liquids like grease or ketchup are around 100,000 cP.

    Some advanced pump designs can handle even higher viscosities up to 3,000,000 cP or more. However, the majority of pumps are rated between 50-1,000,000 cP.

    Factors Affecting the Range

    There are a few key factors that influence the typical:

    • Pump design – Larger clearances between the rotor and stator can handle thicker fluids.
    • Component materials – Harder materials like ceramics are more tolerant of viscosity.
    • Operating conditions – Higher pressures/temperatures impact the effective viscosity.

    Proper pump selection involves matching the expected fluid properties to the pump’s rated. Exceeding this range can cause operational issues.Applications and NPSH Requirement

    Progressive cavity pumps are widely used across many industries handling fluids with different viscosities:

    • Water/wastewater – 1-10 cP with high
    • Oils/lubricants – 100-10,000 cP
    • Slurries/pastes – 10,000-1,000,000 cP
    • Food products – 1,000-100,000 cP

    Higher viscosity fluids impose more resistance during suction, increasing the pump’s. Proper pipe sizing and inlet design are critical to avoid cavitation issues.In summary, the typicalspans from 50-1,000,000 cP, covering applications from water to thick slurries. Key factors like pump design, materials, operating conditions affect this range. Understanding viscosity and how it impacts pumpis important for application selection and system design.

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