What Factors Should Be Considered when Choosing Peristaltic Hoses?

Ⅰ. The Importance of Peristaltic Hoses

Over the years, RUNZE FLUID has always focused on market needs and helped solve various challenges faced by customers in industries and fields such as biopharmaceuticals, food processing, packaging and printing, environmental engineering, chemical synthesis, and optical electronics. However, many people are still wondering what kind of peristaltic hoses should be used to build and transmit various fluids? And what material, diameter, and wall thickness hose should be used for transmission? What is the difference between them?

Ⅱ. Factors to Consider When Choosing Peristaltic Hoses

1. Hose characteristics

(1) The pump tube has a certain degree of elasticity, that is, the hose can quickly recover its shape after being compressed in the radial direction.

(Shore hardness: 40~80).

(2) With certain abrasion resistance.

(3) With a certain ability to withstand pressure.

(4) No leakage (good airtightness) and low adsorption.

(5) Good temperature resistance and not easy to age.

(6) Non-swelling and anti-corrosion.

(7) Low precipitation.

2. Chemical compatibility

When transferring different fluids, the hose should exhibit certain excellent chemical properties, which is called chemical compatibility. The excellent chemical properties are low adsorption, good temperature resistance, resistance to aging, no swelling, corrosion resistance, low precipitation, etc. Ordinary pipes have only general contact with chemicals, while peristaltic pump tubing is in contact with chemical fluids under working conditions. Therefore, the chemical compatibility level of ordinary pipes is quite different from that of peristaltic pump tubing. For various transmission solutions, the peristaltic pump has hoses of corresponding materials to meet the needs. The user should check each chemical substance in the solution to ensure that it is compatible with the selected pump tube.

3. Pressure

When a peristaltic pump pushes fluid through a filter, or pushes fluid through a flow meter or valve, or pumps fluid into a pressurized reaction vessel, back pressure is created. The application of peristaltic pumps is limited by the pressure-bearing performance of the hose. If the system pressure exceeds the pressure of the hose, the hose will expand, resulting in excessive wear of the hose or rupture of the hose.

4. Temperature

The adaptability of the hose to the operating temperature range is a factor to be considered by the user. Different materials have different temperature performances. Some pipes, such as silicone rubber, have a wide temperature tolerance range and are suitable for both high and low-temperature processes, while some pipes are only suitable for a small temperature range. Therefore, before selecting the pipe, the user should first find out the maximum temperature and the minimum temperature in the system, and then ensure that the selected pump pipe is safe to work in this temperature range.

5. Dimensions

The size of the hose directly affects the flow rate. The inner diameter of the hose determines the flow rate, and the inner diameter is directly proportional to the flow rate. Wall thickness affects the ability of the hose to be compressed and rebound and also has a great impact on the life of the hose.

6. Air permeability

For some gas-sensitive fluids, such as fluids that are susceptible to oxidation, or anaerobic cell culture fluids, users should consider the air permeability of the pipeline. In general, the air permeability of the silicone tube is relatively high. Therefore, for fluids that are not suitable for contact with the gas, peristaltic pump tubing with lower air permeability should be used.