What's the difference between pneumatic soft sealing butterfly valve and pneumatic hard sealing butt

Pneumatic butterfly valve according to the sealing material is divided into pneumatic soft sealing butterfly valve and pneumatic hard sealing butterfly valve. That is to say the pneumatic soft sealing butterfly valve and pneumatic seal butterfly valve is the main difference between the seal material body is different, so choose pneumatic soft sealing butterfly valve, what scene dynamic hard sealing butterfly valve with gas in what scene? Here is not in Shanghai to share with you:

The sealing characteristics of pneumatic soft sealing butterfly valve is the seal between metal and non-metallic, PTFE, nylon and other materials generally used; pneumatic seals seal butterfly valve sealing between metal and metal, so the seal is stainless steel, copper and other metal materials.

Pneumatic soft seal butterfly valve mechanism can not withstand high pressure environment, so pneumatic soft sealing butterfly valve can only work in atmospheric environment; and in the high pressure environment, you need to use pneumatic hard sealing butterfly valve.

In some industries under the high temperature environment requirements, and some even high temperature and high pressure work environment requirements, pneumatic soft sealing butterfly valve is not competent, need to use pneumatic hard sealing butterfly valve. Pneumatic hard seal butterfly valve has high resistance to friction and corrosion resistance, and it can be used in complex working environment.

Pneumatic soft sealing butterfly valve seal material fire performance is poor, so in the work environment should pay attention to fire prevention, high temperature measures; pneumatic sealing seal butterfly valve by metal material production, so it has a certain fire resistance performance, suitable for high temperature environment.