Chemical metering pump categories

 sales01@cxflowmeter.com

Chemical metering pump categories

Chemical metering pumps are key equipment for accurate metering and delivery of fluids in the chemical industry. According to different 

working principles, structures and application scenarios, chemical metering pumps can be divided into many types. The following are some

 common types of chemical metering pumps:

1. Classification by working principle

Plunger metering pump

Working principle: The motor drives the crank-connecting rod mechanism to make the plunger reciprocate in the pump cylinder to achieve 

the suction and discharge of liquids.

Features: High metering accuracy, but there may be some leakage when using packing seals, suitable for industries such as petroleum and 

beverages.

Diaphragm metering pump

Working principle: The reciprocating motion of the flexible diaphragm is used to achieve the suction and discharge of liquids. The diaphragm

 isolates the metering fluid from the driving mechanism to ensure no leakage.

Features: Good sealing, strong corrosion resistance, widely used in various acid and alkali liquids and water treatment industries.

Piston metering pump

Similar to the plunger type, but the structure is different. The reciprocating motion of the piston is also used to achieve liquid metering and

 delivery.

Gear metering pump

Uses the rotational motion of one or more pairs of meshing gears to push the liquid, suitable for high-viscosity liquids and high-pressure 

applications.

Screw metering pump

Pushes the liquid from the inlet to the outlet through the rotational motion of the screw, suitable for high-viscosity liquids and high-pressure

 applications, and has a high flow capacity.

2. Classification by drive mode

Motor-driven metering pump

Most plunger and diaphragm metering pumps use motors as power sources.

Electromagnetic-driven metering pump (electromagnetic diaphragm pump)

Uses electromagnetic force as the original power to drive the diaphragm to reciprocate to achieve liquid metering and transportation. It is 

convenient, simple and practical, and is widely used in chemical, petroleum, metallurgy and mining industries.

Pneumatic-driven metering pump

Uses compressed air or other gases as the power source to push the piston or diaphragm to move.

3. Other special types

Hydraulic diaphragm pump

The pressure difference generated by the liquid is used to provide power for the hydraulic diaphragm pump. It is characterized by no leakage 

and is suitable for occasions with extremely high requirements for sealing.

Self-priming metering pump

It has a self-priming function and can automatically suck in liquid without external drainage. It is suitable for occasions that require 

self-priming ability.

Magnetic metering pump

It uses magnetic coupling technology to achieve leak-free fluid transmission. It is particularly suitable for the transportation of corrosive, 

toxic or flammable and explosive liquids with extremely high sealing requirements.

When choosing a chemical metering pump, it is necessary to comprehensively consider factors such as the properties of the fluid (such as 

viscosity, corrosiveness, temperature, etc.), flow requirements, pressure requirements, and working environment. Different types of metering 

pumps have different advantages and disadvantages and applicable scopes, so they need to be selected according to specific needs.

If you want to know more about the selection and quotation of chemical metering pumps, 

please consult CIXIFM winny: sales01@cxflowmeter.com