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Writer's pictureAmerigo Exports
Dec 15, 20232 min read

Know more about Plunger Dosing Pumps

A plunger metering dosing pump is a type of positive displacement pump or reciprocating plunger pump used for accurately dispensing precise amounts of liquid, typically in chemical dosing applications. It is commonly employed in industries such as water treatment, chemical processing, pharmaceuticals, and oil and gas.

Here's a breakdown of its key components and how it generally works:

  1. Plunger Mechanism:

  • The pump features a plunger, which is a reciprocating (moving back and forth) rod or piston that displaces the liquid.

  • The plunger is typically made of materials that are resistant to the corrosive nature of the chemicals being pumped.

  1. Metering Mechanism:

  • The term "metering" refers to the precision with which the pump can dispense a specific volume of liquid.

  • The pump is designed to accurately measure and deliver a predetermined volume of liquid per stroke.

  1. Dosing Capability:

  • Dosing pumps are commonly used for injecting precise amounts of chemicals or additives into a process stream.

  • This is critical in applications where exact quantities of chemicals need to be added for the process to function properly.

  1. Adjustability:

  • Plunger metering dosing pumps often have adjustable stroke lengths or variable speed settings, allowing operators to fine-tune the amount of liquid being dispensed.

  1. Check Valves:

  • The pump is equipped with check valves on both the suction and discharge sides.

  • These valves ensure that the liquid flows in one direction, preventing backflow and maintaining the accuracy of the dosing.

  1. Drive Mechanism:

  • Plunger pumps are powered by various mechanisms, such as electric motors, pneumatic systems, or hydraulic systems, depending on the application requirements.

  1. Materials of Construction:

  • The materials used in the construction of the pump are chosen based on the type of liquid being pumped. They are often resistant to corrosion and chemical attack.

  1. Safety Features:

  • Some pumps come with safety features such as leak detection, pressure relief valves, and alarms to ensure the reliability and safety of the dosing process.

Plunger metering dosing pumps are favored in applications where accuracy and precision are crucial, as they provide a controlled and reliable method for dispensing specific volumes of chemicals or additives into a system.



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