8 Types Of Chemical Dosing Pumps & System Design
Chemical dosing pumps refers to pumps that are made in a way to allow chemicals and other substances to follow into a water or gas system in an accurate and precise manner.
The pumps are usually powered by electric motors and use controllers to navigate and turn the pump on and off. They control the discharge rate of chemicals, particles, and other solutions to avoid wastage.
If you work in a water treatment and sanitization firm or have ventured into some agriculture businesses, here are some available chemical dosing pumps to choose from.
1. Lobe Chemical Dosing Pump
This pump is used for dosing substances and solutions with a higher level of viscosity than water. The pump has lobes that are rotated in order to generate the pumping action.
It ensures that this substance flows accurately and reliably in any orientation and adverse conditions, such as high vibration, high-pressure differentials, and extreme temperatures.
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2. Plunger Dosing Pump
It has a piston that, when moved, creates a void in a chamber to allow the fluid to move into the chamber.
If the piston is moved forward, the pump compresses the solution, consequently pushing it out.
This pump ensures high pressure; therefore, the amount of substance it pumps is directly proportional to the pressure applied.
3. Gear Dosing Pump
This dosing pump has two gears that rotate in an anti-clockwise direction. It is designed to move the fluid in between the gear part and enable throb-deficient dosing.
Gear pumps are mostly used when accurate dosing is required, or the output should have high pressure.
In addition, a gear pump ensures that a constant and equal volume of the substance is pumped in each rotation.
4. Diaphragm Dose Pump
It has a diaphragm structure, which it uses to pump fluids. When the diaphragm is expanded, the volume in the chamber rises.
The solution gets into the pump due to a rise in volume. The fluid is moved out by constricting the diaphragm. This pump does not allow leakages when functioning and can also be used to dose heterogeneous fluids.
Additionally, it is the most appropriate for pumping harmful substances because it has a hermetic seal. That is, an airtight seal, to prevent the passage of other unwanted substances.
5. Peristaltic Pump
It is a dosing pump made of abrasion-resistant tubes made of stretchable and elastic materials.
They are highly recommended for applications that require low pressure or where a small flow of the substance is required.
The pump is very precise in the movement of substances because they pump solutions and liquids that are proportional to the rotating speed.
6. Vane Chemical Pump
These pumps are made of a cylindrical chamber or a reservoir where the desired fluid is sent. It operates using a siphoning concept whereby the vane pump’s nozzle acts like a siphon.
As the fluid enters the nozzle, liquid drops from the outside of the pipe to the inside. These drops are moved to a tank, collected, and sent to a reservoir.
They eventually flow back through the same nozzle, sending more of the same fluid to another tank. The pump is not commonly used as the nozzles can get clogged fast or even corroded if it pumps hard water.
7. Screw Pumps
A screw dosing pump is commonly used in the pharmaceutical industry to produce precise volumes of liquid. They work by having an input and output chamber connected to a screw rotated by some driving mechanism.
Sometimes they are driven mechanically, while others are driven pneumatically. The pumping action causes the liquid in one chamber to flow through the other.
This results in a controlled and precise amount of the substance passing through at any given period.
8. Rotary Dosing Pump
A rotary dosing pump is a type of pump where the motor is in the form of a rotary. It has an impeller with vanes that brush against stationary blades.
They are often used to continuously pump viscous liquids, such as paint and oil, from one container to another. Rotary dosing pumps rely on several concepts to function.
The most important of which is Newton’s third law, for every action, there is an equal and opposite force. This means that applying a force to one side of the pump can generate an equal force on the other side of the pump.
When the pump rotates, it creates its own vacuum and does not require priming to function efficiently.