The Differences between Peristaltic Pumps and Metering Pumps

Peristaltic pump and metering pump belong to two different concepts. Peristaltic pump refers to the working principle, while metering pump refers to the pumping measurement process. In simple terms: a peristaltic pump can serve as a metering pump, but a metering pump includes not only peristaltic pumps, but also diaphragm pumps, plunger pumps, injection pumps, gear pumps, etc. If you used diaphragm pumps and plunger pumps in the past to achieve metering and delivery functions, you can now replace them with peristaltic pumps to achieve the same metering and delivery functions.

I. Definition of Metering Pump:

To understand the difference between peristaltic pumps and metering pumps, it is first necessary to understand the definition of a metering pump: A metering pump is a type of pump that can measure and deliver fluids, also known as a quantitative or proportioning pump. Therefore, it is often used for adding various types of chemicals, and is also called a dosing pump. A metering pump can stably deliver fluids, and by adjusting its speed and proportion, it can control the flow rate.

II. Relationship between Peristaltic Pump and Metering Pump:
According to the definition of a metering pump, any pump that can meet the functions of measurement and dosing can be called a metering pump. Peristaltic pumps can also meet the functions of measuring and quantitative delivery, and their delivery accuracy can reach ±0.2~1%. Therefore, many people also call peristaltic pumps peristaltic metering pumps, peristaltic dosing pumps, or metered peristaltic pumps. The relationship is as follows: Peristaltic pumps are metering pumps, as are diaphragm pumps and plunger pumps.

III. Types of Metering Pumps:

There are many types of pumps that can satisfy the function of measurement, including peristaltic pumps, diaphragm pumps, plunger pumps, injection pumps, gear pumps, etc. However, when people generally refer to metering pumps, they mainly mean diaphragm pumps and plunger pumps or piston pumps. Diaphragm pumps are mainly divided into pneumatic diaphragm pumps and electric diaphragm pumps.

IV. Characteristics and Problems of Metering Pumps:

1. Plunger pumps and diaphragm pumps both contain check valves, sealing elements, membranes, etc. The maintenance cost of plunger pumps and diaphragm pumps is high, as they require disassembly and cleaning. Disassembly and maintenance require professional workers, have high difficulty, and take a long time. The pollution on site is also significant.

2. When plunger pumps and diaphragm pumps work, the liquid passes through the body of the pump, creating dead corners inside the body. This makes cleaning the pump very difficult. It cannot be used for processes that require hygiene and clean transportation.

V. Characteristics and Advantages of Peristaltic Pumps:

1. Peristaltic pumps have a function similar to a stop valve, without a one-way check valve or sealing elements, so there is no problem of blockage or wear.

2. The liquid only passes through the peristaltic pump hose, without dead corners, making it very hygienic and clean.

3. Replacing the hose of a peristaltic pump is simple and easy to maintain. It does not require professional maintenance workers. After the hose reaches the end of its service life, an ordinary operator can replace it. The service life of the peristaltic