Plunger Dosing Pumps

Dosing plunger pumps: structure and operating principle

Dosing plunger pumps are essential devices in industrial and laboratory automation, playing a crucial role in the precise dosing of liquids and chemical reagents.

Structure of dosing plunger pumps

Dosing plunger pumps

Dosing plunger pumps consist of several main components, each serving a unique function to ensure accurate dosing. The key parts include:

• Plungers: Piston-like elements that move inside cylinders under the action of the drive mechanism. Plungers are responsible for creating pressure in the system;
• Cylinder: Contains the plungers and provides a sealed space for their movement. The cylinder also has valves to control the flow of the liquid;
• Drive Mechanism: Facilitates the movement of plungers inside the cylinder. The mechanism can be electric, hydraulic, or pneumatic, depending on the specific application;
• Valves: Control the direction of fluid flow in the system, ensuring a one-way flow and preventing the backward movement of the liquid.

Operating principle of dosing plunger pumps

The functioning of dosing plunger pumps is based on the cyclic movement of plungers inside the cylinder. During the downward stroke of the plunger, liquid is drawn in through the intake valve. As the plunger rises, pressure increases, forcing the outlet valve to open and transferring the liquid into the system.

Dosing precision is achieved through strict control of plunger movement and the use of special valves that minimize liquid loss during the pumping process.

Applications of dosing pumps

This pumping equipment finds wide applications in various industries:

• Industrial Processes: Widely used in chemical, food, pharmaceutical, and other industrial sectors for the precise dosing of reagents and liquid components in manufacturing processes;
• Laboratory Research: In laboratory practice, they are employed for delivering precise volumes of reagents in chemical and biological research;
• Water Treatment and Disposal: Applied for dosing chemical reagents in water purification and wastewater treatment systems;
• Oil and Gas Industry: In the oil and gas sector, they are used to inject precise volumes of additives and reagents into oil and gas extraction and processing processes.

Dosing plunger pumps are reliable and efficient devices that play a key role in the automation of production and laboratory research. Their accuracy and reliability make them indispensable components in many industries where precise dosing of liquid components is required.