How to choose valves in chemical industry?

Yongjia Dalunwei valve co.,ltd produces ball valves that are widely used in the chemical industry. The chemical industry process is complex and the medium is special, which puts forward higher requirements for the selection and use of valves. The performance of the valve is directly related to the production safety, product quality and energy consumption level, and is the key equipment for fluid control in the production process. Therefore, in the chemical industry, it is crucial to choose the right valve.
Several key points of valve selection in the chemical industry:
First, corrosion resistance
There are many kinds of media involved in the chemical production process, including acid, alkali, salt, organic solvents, suspended particles, etc. These media generally have strong corrosion. 1, the material selection of the valve must have excellent corrosion resistance, such as stainless steel, alloy steel, titanium, nickel-based alloy and other corrosion resistant materials. 2, for some special corrosive media, the lining process can also be used, such as fluorine plastic, rubber, etc., to improve the corrosion resistance of the valve.

Second, sealing performance
In the environment of high pressure, high temperature or toxic and harmful media, poor seal may cause serious safety accidents. Therefore, the sealing structure design of the valve should be reasonable, and the sealing material should have good wear resistance, creep resistance and temperature resistance. Commonly used sealing materials include PTFE，Devlon，Peek, graphite, ceramics and so on.

Third, temperature and pressure resistance
Chemical production may face extreme temperature and pressure conditions. Therefore, the valve material and structural design should withstand the corresponding working temperature and pressure. 1. Common high temperature resistant materials include heat resistant steel, superalloy, etc. 2, low temperature resistant materials include austenitic stainless steel, aluminum alloy, etc.

4. Operational reliability
The opening and closing of chemical valves should be flexible and reliable, which is directly related to the stability and safety of the production process. Avoid accidents caused by improper operations or equipment failures. To increase the level of automation and reliability of valve operation, electric, pneumatic or hydraulic actuators can be used to drive the valve, especially in hazardous environments, where remote control and automatic protection functions are particularly important.

5. Cleanliness requirements
In some fine chemical or pharmaceutical industries, the production process requires very high cleanliness of the medium.
1, the internal structure of the valve should be simplified as far as possible, reduce dead corners and dirt areas, easy to clean and maintain.