Selection of sealing materials for imported pneumatic butterfly valve


Release time:

2020-02-13

Pneumatic butterfly valve is an important industrial valve, has been widely used in many fields. The sealing material of pneumatic butterfly valve is one of the key factors to ensure its sealing performance. This paper will take the selection of imported pneumatic butterfly valve sealing materials as the theme, introduce the common pneumatic butterfly valve sealing materials and selection methods.

Pneumatic butterfly valve is an important industrial valve, has been widely used in many fields. The sealing material of pneumatic butterfly valve is one of the key factors to ensure its sealing performance. This paper will take the selection of imported pneumatic butterfly valve sealing materials as the theme, introduce the common pneumatic butterfly valve sealing materials and selection methods.

A common pneumatic butterfly valve sealing material

Rubber sealing material: Rubber sealing material is one of the common pneumatic butterfly valve sealing materials. Commonly used rubber materials include nitrile butadiene rubber (NBR), ethylene propylene rubber (EPDM) and so on. Nitrile butadiene rubber has good oil and wear resistance, but is not suitable for high temperature environment. Ethylene propylene rubber has good acid and alkali resistance and oxidation resistance, suitable for high temperature and acid and alkali environment.

Polytetrafluoroethylene sealing material: polytetrafluoroethylene (PTFE) sealing material is a kind of sealing material with good corrosion resistance and high temperature resistance. PTFE has very low friction coefficient and good non-viscosity, suitable for a variety of media seal.

Metal sealing materials: metal sealing materials mainly include stainless steel, copper alloy, aluminum alloy, etc. Metal sealing material has good corrosion resistance and high temperature resistance, suitable for high pressure, high temperature and corrosive media sealing.

Two, the selection of pneumatic butterfly valve sealing materials

In the selection of pneumatic butterfly valve sealing material, the following factors need to be considered:

Working conditions: Select the appropriate sealing material according to the working environment of the pneumatic butterfly valve. Such as temperature, medium properties, pressure, etc.

Sealing performance: According to the sealing requirements of the pneumatic butterfly valve, select the appropriate sealing material. Such as corrosion resistance, wear resistance, etc.

Economy: According to the economic actual selection of appropriate sealing materials. Such as rubber sealing material is relatively cheap, metal sealing material is relatively expensive, need to choose according to the actual situation.

Reliability: Select sealing materials with high reliability according to the requirements of pneumatic butterfly valve. Such as PTFE sealing material has good corrosion resistance and high temperature resistance, but it is easy to produce cold flow phenomenon at low temperature, need to choose according to the actual situation.

Other factors, such as safety and environmental protection, should also be considered.

To sum up, the selection of suitable pneumatic butterfly valve sealing material can ensure the sealing performance and reliability of pneumatic butterfly valve. In the selection of materials need to consider the pneumatic butterfly valve working conditions, sealing performance, economy, reliability and other factors. Common pneumatic butterfly valve sealing materials include rubber sealing materials, polytetrafluoroethylene sealing materials and metal sealing materials. According to the actual situation to choose the appropriate sealing material can maximize the role of the pneumatic butterfly valve.