The metering pump is such a device having versatile mechanisms. For many applications, where a pumping unit requires in-line dosing of liquids, you need to install this type of pump. Different industries, including pharmaceuticals, detergents, toiletries, chemical processing, petrochemicals, and gas recovery, involve this pump for dosing hydrocarbon, liquid CO2, etc.

What Is The Core Principle of Metering Pump?

In some industries, metering pumps are familiar as dosing pumps. This type of pump comes with such a particular design, which effectively dispenses a specific amount of liquid. This specific pumping device has unique technology to work with a measured flow control system. For the essential movement of liquids, these devices use contracting and expanding chambers.
In terms of time management, metering pumps perform flawlessly to deal with corrosive slurries, acid-based fluids, etc. Few particular industries such as medicine, agriculture, and manufacturing require these pumps to meet different purposes.

Among so many individual types of metering pumps, you will get specifications on the best ones here:

How Does A Diaphragm Metering Pump Work?

Diaphragm pump works following the technique of positive displacement force. The involvement of a reciprocating diaphragm directs the pumping unit to move fluids. In terms of reliability, this pump never disappoints you as it does not depend on any internal parts, which can overlap together. As well as the technology of this type of metering pump keeps its mechanism free from any friction.

Moreover, as its pump head does not require any lubrication or seals, you can depend on its performance without any vapor contamination of media leakage. During operation.

The simple driving mechanism of the diaphragm metering pump involves dual valves and a displacement chamber. The diaphragm works as a membrane, which creates vibration in the most spontaneous manner to generate suction. The suction force moves the liquid to make an entry in the pumping chamber and exit from the space. In the displacement chamber and attached flange, the pumping chamber is equipped.
Both flapper valves and spring-loaded valves involve a diaphragm for the operation.

They execute the process of pulling the fluid in and pushing the fluid out of the pump chamber. A potential mechanism consists of a diaphragm for the operation.
There are several driving mechanisms to activate the diaphragm.

Among them, air-operated driving mechanisms and motor driving mechanisms are considered the effective ones.

How Air-Operated Diaphragm Metering Pump Works?

The energy of compressed air works to activate the dual-diaphragm in an alternative way. For alternating the flow of air, a shuttle valve works between dual diaphragms. During the media, the flow of fluid is regulated by the air pressure supplied by the pump.

How do Motor-Driven Diaphragm Metering Pumps work?

This type of metering pump involves the powerful rotary motion, which drives the reciprocating movement to create displacement force using the volume of liquid.

How Does A Peristaltic Metering Pump Work?

Peristaltic metering pumps contain quite similar mechanisms to positive displacement pumping devices. But it follows a different process of execution, the primary driving force. The peristaltic pump has rotating rollers to move the liquid from the flexible tubing utilizing a pressurized water flow. As with the restriction of tubing, the low-pressure water volume starts to increase; the pressurized flow generates a vacuum to pull the fluid into the tube. Then the liquid is sent through the tubing, which is bound at several portions by the rollers.
With every step of rotating motion, the fluid starts to flow through the path of the tubing. The specific design of the peristaltic metering pump has a circular or linear structure to execute the mechanism.

What Are The Advantages of Metering Pump?

Both diaphragm and peristaltic metering pumps provide many benefits to different industries, where they perform for rugged applications. They have an authentic capability to disperse the required amount of liquid constantly. Moreover, the following points represent the benefits of this pump in different industrial operations.

❖ Having exact and accurate technique, a peristaltic metering pump is used to move low quantities of liquids. Based on their eligibility of different models, they can lift a fixed gallon of fluid per hour. So, as per the requirement of the specific industry, the models should be selected for the operation.
❖ Peristaltic metering pumps are capable of transferring different types of fluids with a variety of thicknesses. This type of pump even can handle corrosive chemicals.
❖ The efficient mechanisms of this pump make it an excellent choice for different kinds of applications in the industries, including medicine, food, agriculture, processing, and manufacturing.
❖ Peristaltic metering pump follows a specific protocol to prevent contamination. In terms of safety to protect your pump unit from contamination, both diaphragm and peristaltic types of metering pumps have effective mechanisms to stop contamination in the operation field.

Best Recommendation To Select A Metering Gear Pump

For various types of applications, you can use a compatible gear pump as a metering pump. You keep in mind that the unique design and configuration should be consistent for flawless metering performance. Because for each metering application, a gear pump is not a suitable option. So, you need to follow the proper recommendations before buying any model of gear pump for metering applications.

❖ It would help if you focused on the requirements of metering accuracy, which executes viable operations. Sometimes, extreme accuracy specifications can lead to an unnecessary increment of expense to solve the metering problem.
❖ Don’t forget to consider all the possible circumstances, which can affect the pump performances. Must keep in mind that rectifying the issues, which create barriers to implementing pumps, is quite tricky.
❖ Regulate the variation of pressure. Focus on the relatively small-sized suction line and discharge line along with a fewer number of fittings. A vertical suction lift will play an advanced role here. So, make sure about the sufficient NPSHA to be safe from cavitation. Minimize the pump speed during high viscosities applications.

All these discussions represent the possible conditions in which you can select a gear pump as a metering pump.

Two Major Advantages of Installing Gear Pump As Metering Pump

The overall engineering of a gear pump reflects a high level of wear resistance. As well, in terms of dimensional stability, this pump works better. The matter of extreme fluid temperature can not affect the gear pump mechanism. Besides, while it deals with the corrosive composition, the working principle of this pump keeps the equipment safe.

Let’s Take A Look At The Benefits of Metering Gear Pump;

❖ This pump efficiently works to execute the metering operation of volumetric fluid output. During the process, its exact mechanism maintains minimal pulsation and constant speed.
❖ The sizing of gear teeth plays a vital role in keeping pulsation under the minimum range during rotation.
❖ The metering gear pump is highly efficient in executing high amounts of pumping clearances.
❖ In terms of clearances, this pump unit measures the fluid particles in microns for minimizing liquid slip.
❖ During gear teeth and sidewall, the range of clearances remains 0.00015 to 0.0031 millimeters.
❖ Constant dosing of the stream moves the thin and small cavities as per revolution.
❖ While operation speed, temperatures, and pressures change, the pump mechanism maintains the suspension of linear flow.
❖ Due to executing accurate speed maintenance capability, the metering gear pump comes with an efficient speed controlling system.

Therefore, the entire discussion shows the particular mechanisms and specifications of different kinds of metering pumps. Now, you can opt for the most suitable one as per your requirement.


Mike Brown has done Masters in Hydrology and Water Management. He loves coffee and likes to lecture people on climate change. He plays PUBG when he is not working.

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