Positive Displacement Pumps

Positive Displacement Pumps

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  • Types of Positive Displacement Pumps: LixaChem offers Gear Pumps, Diaphragm Pumps, Screw Pumps, and Peristaltic Pumps, each designed for precise and consistent fluid handling in industrial processes.
  • Key Applications: These pumps are used in various industries, such as chemical processing, wastewater treatment, oil and gas, food and beverage, and pharmaceuticals, for handling viscous, abrasive, and sensitive fluids.
  • Top Brands & Tailored Solutions: LixaChem provides pumps from trusted brands like Sundyne, Ebara, Grundfos, and Prominent, along with expert support to ensure the best pump selection for specific needs.

Positive Displacement Pumps

Positive Displacement Pumps provide precise flow control, making them crucial in industries like chemical processing, pharmaceuticals, and food production. These pumps differ from centrifugal pumps, known for handling high fluid volumes, and slurry pumps, which are built for abrasive mixtures. In environments requiring underwater operations, submersible pumps are preferred, while diaphragm pumps and gear pumps serve specialized functions in fluid handling.

These pumps differ significantly from Centrifugal Pumps, which excel at handling high fluid volumes in applications such as water treatment and industrial processes. For operations involving high-pressure or precise dosing needs, Reciprocating Pumps are ideal due to their ability to deliver consistent and controlled flow.

In environments requiring underwater operations, Submersible Pumps are the preferred choice, offering reliable performance in dewatering and fluid transfer applications. Additionally, diaphragm pumps and gear pumps serve specialized functions in fluid handling, ensuring comprehensive solutions for diverse industrial needs.

a. Gear Pumps (External, Internal)

Gear Pumps are a type of positive displacement pump that use rotating gears to move fluid. These pumps are available in two primary types: External Gear Pumps and Internal Gear Pumps. Gear pumps are highly efficient and are known for their ability to handle viscous fluids and provide precise flow control.

External Gear Pumps:

  • Two Rotating Gears: Fluid is trapped between the teeth of two gears as they rotate, pushing the fluid through the pump.
  • High Pressure Capability: Able to handle higher pressure applications than many other types of positive displacement pumps.
  • Compact and Simple Design: Easy to maintain with few moving parts.

Internal Gear Pumps:

  • Intermeshing Gears: One gear rotates inside another, trapping and moving fluid through the pump.
  • Smooth Operation: Ideal for applications requiring consistent, low-pulse fluid transfer.
  • Handling of Viscous Fluids: Effective for moving thick liquids like oils, syrups, and molasses.

Key Benefits:

  • Precise Flow Control: Delivers a consistent, accurate flow regardless of system pressure.
  • High Viscosity Handling: Capable of moving thick, viscous fluids with ease.
  • Durability: Built to last in demanding environments with minimal maintenance.

Applications:

  • Chemical Processing: Used to pump chemicals and additives with precision.
  • Lubrication Systems: Ideal for moving lubricants in mechanical systems.
  • Food and Beverage: Used for transferring syrups, oils, and other high-viscosity liquids.

Available Brands:

  • Grundfos, Sulzer, PIUSI

Advantages Of Positive Displacement Pumps

b. Diaphragm Pumps (Air-Operated, Hydraulic)

Diaphragm Pumps are positive displacement pumps that use a flexible diaphragm to move fluid. They are available in two main types: Air-Operated Diaphragm Pumps and Hydraulic Diaphragm Pumps. These pumps are ideal for handling corrosive, abrasive, and hazardous fluids, as well as slurries and viscous liquids.

Air-Operated Diaphragm Pumps:

  • Pneumatic Operation: Uses compressed air to move the diaphragm and displace the fluid.
  • Leak-Free Design: No seals or moving parts in contact with the fluid, minimizing the risk of leaks.
  • Versatile and Portable: Easy to transport and use in various locations.

Hydraulic Diaphragm Pumps:

  • Hydraulic Drive: Uses hydraulic fluid to move the diaphragm, offering greater pressure and flow capabilities.
  • Heavy-Duty Construction: Designed for more demanding applications with higher pressures.

Key Benefits:

  • Corrosion and Abrasion Resistance: Can handle highly corrosive and abrasive fluids without degradation.
  • Leak-Free Operation: No mechanical seals, reducing the chance of fluid leaks and contamination.
  • Self-Priming: Capable of priming themselves, making them ideal for intermittent pumping operations.

Applications:

  • Chemical Handling: Ideal for corrosive or abrasive chemicals in industrial processes.
  • Wastewater Treatment: Used for pumping sludges and slurries in treatment plants.
  • Mining: Suitable for handling abrasive slurries in mining operations.

Available Brands:

  • Sundyne, Prominent, Ultra Pump

c. Screw Pumps

Screw Pumps are positive displacement pumps that use one or multiple screws to move fluid along the axis of the screw. These pumps are known for their ability to handle high flow rates at relatively low pressure, making them suitable for transporting viscous fluids over long distances with minimal pulsation.

Key Features:

  • Multiple Screw Design: Fluid is trapped between the screw threads and moved along as the screws rotate.
  • Smooth Flow: Delivers continuous, low-pulsation flow, ideal for applications where consistent delivery is required.
  • High Viscosity Handling: Effective at moving viscous fluids like oils, sludges, and slurries.

Key Benefits:

  • Low Pulsation: Provides smooth, non-pulsating flow, reducing the wear on system components.
  • High Efficiency: Capable of handling large volumes of fluid with minimal energy loss.
  • Long-Lasting Performance: Designed for heavy-duty applications, screw pumps are built to withstand continuous use in challenging environments.

Applications:

  • Oil and Gas: Commonly used for transporting crude oil, fuel, and other viscous fluids.
  • Marine Industry: Used in ship bilge pumping and fuel transfer systems.
  • Food and Beverage: Suitable for handling viscous liquids such as syrups, honey, and chocolate.

Available Brands:

  • Ebara, Weir, Finder

d. Peristaltic Pumps

Peristaltic Pumps operate by compressing and relaxing a flexible tube to move fluid. This action mimics natural peristalsis, making these pumps ideal for handling delicate or viscous fluids without contamination. Peristaltic pumps are used in applications where sterile, contamination-free transfer is critical.

Key Features:

  • Flexible Tube Design: Fluid is contained within a flexible tube, which is compressed by rollers or shoes to move the fluid forward.
  • No Fluid Contact with Moving Parts: The fluid only touches the interior of the tube, ensuring contamination-free pumping.
  • Self-Priming: Capable of dry running and self-priming, allowing for easy operation in varied applications.

Key Benefits:

  • Gentle Pumping Action: Ideal for shear-sensitive fluids, ensuring that the fluid’s properties are not altered during transfer.
  • Contamination-Free Transfer: Since the fluid remains isolated from the pump mechanism, it’s perfect for sterile or sensitive applications.
  • Versatile Application: Effective at pumping both thin and thick fluids, including those with particulate matter.

Applications:

  • Pharmaceuticals: Used for transferring sterile solutions and delicate fluids without contamination.
  • Water Treatment: Effective in dosing chemicals in water treatment plants.
  • Food Processing: Suitable for handling sauces, creams, and other food products without affecting their consistency.

Available Brands:

  • Finder, Hermetic, Ultra Pump

Why Choose LixaChem for Positive Displacement Pumps?

At LixaChem, we provide a comprehensive range of Positive Displacement Pumps to meet the specialized needs of various industries. Whether you’re handling chemicals, slurries, viscous fluids, or delicate liquids, our pumps are designed to deliver precision and reliability. With products sourced from top manufacturers, we ensure that you receive high-quality, durable solutions that meet your operational requirements.

Key Benefits:

  • Precision Fluid Handling: Our pumps provide consistent, accurate flow control, making them ideal for demanding applications.
  • Trusted Brands: We offer products from reputable manufacturers like Sundyne, Ebara, Grundfos, and Prominent.
  • Tailored Solutions: Our team of experts works with you to select the right pump for your specific application, ensuring optimal performance.

For more information on our Positive Displacement Pumps or to explore other Process Equipment available at LixaChem, contact us today.

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