The influence of material selection of manual butterfly valve on service life

The influence of material selection of manual butterfly valve on service life

The manual butterfly valve is a common regulating valve commonly used to control flow and pressure in fluid lines. Different butterfly valve materials have a direct impact on the service life, so the following factors need to be considered when selecting the appropriate valve material:

1. Fluid properties
The material of the valve should be selected according to the nature of the fluid, such as the material with good corrosion performance when there is a strong corrosive liquid. If the flow rate of the liquid is fast, high strength materials need to be used.

2. Temperature and pressure
Valve material should also be selected according to fluid temperature and pressure. In high temperature and high pressure environments, it is necessary to use high temperature materials and high pressure materials to make manual butterfly valves to ensure that the valves can work normally and will not be damaged or failed due to high temperature or pressure.

3. Corrosion resistance
In some special fields such as wastewater treatment, chemical production and Marine mining, fluids have strong corrosive properties. Therefore, it is necessary to choose materials with better corrosion resistance to make valves.

Manual butterfly valves of different materials have advantages and disadvantages, the following are several materials:

1. Stainless steel valve
Stainless steel is one of the common valve materials, with strong toughness and corrosion resistance, so stainless steel materials are often used in the production of manual butterfly valves. Stainless steel valves are relatively heavy, but have a long service life and are often used in situations with high corrosion resistance requirements.

2. Cast iron valves
Cast iron valves are cheaper, but they are lighter and wear easily. Suitable for low pressure and medium temperature environment, the service life is relatively short.

3. Titanium alloy valve
Titanium alloy valve has good corrosion resistance, corrosion resistance, can be used in acid, alkaline, chlorine salt and other harsh environment. However, due to the special material, the price is more expensive.

4. Plastic valves
Plastic material has good corrosion resistance, suitable for chemical, pharmaceutical and other industries of corrosive liquid treatment. However, the service life is relatively short, and the pressure and temperature range it can withstand are also limited.

When selecting a manual butterfly valve, it is necessary to make a reasonable material selection according to factors such as pressure, temperature, fluid properties and corrosion in the use environment to ensure the normal operation of the valve, extend the service life, and reduce the number of maintenance and cost.