Q: What are the operating characteristics of pneumatic butterfly valves? Answer:? Pneumatic butterfly valve is composed of pneumatic actuator and butterfly valve. The pneumatic butterfly valve uses a round butterfly plate that rotates with the valve stem for opening and closing, so as to realize the starting action. The pneumatic valve is mainly used as a block valve. It can also be designed to have the function of regulating or section valve and regulating. At present, butterfly valves are increasingly used in low-pressure large and medium-sized pipelines. Classification of pneumatic butterfly valve: stainless steel pneumatic butterfly valve, hard seal pneumatic valve

Brief Analysis on Color Selection of Stainless Steel Pneumatic Butterfly Valve with Good Quality
If you want to purchase a good pneumatic butterfly valve, you should consider the comprehensive factors of the pneumatic butterfly valve, the medium characteristics of the pneumatic butterfly valve, the natural conditions of its installation site, the size of the pipe diameter of the pneumatic butterfly valve, the maximum displacement and other factors.
The flexible body of pneumatic butterfly valve is divided into annular bellows flexible body and spiral bellows flexible body. In order to compensate displacement, installation tendency and foundation settlement, absorb vibration and reduce noise, annular bellows pneumatic butterfly valve should be selected; For places with high pressure but infrequent displacement and vibration, spiral bellows pneumatic butterfly valve should be selected. The nominal pressure of pneumatic butterfly valve refers to the maximum working pressure available at room temperature.
I'm afraid the stainless steel products that everyone first came into contact with were stainless steel tableware. We all know that their color is bright. Some flat stainless steel can almost be used as mirrors.
So is the color of all stainless steel products bright? Neither.
Some customers think that the color of stainless steel pneumatic butterfly valve should be relatively bright. In fact, we will find that some kinds of stainless steel pneumatic butterfly valves are snow-white or even dark silver gray.
For example, 316L stainless steel bellows is not bright in snow white color.
It was once thought that the bright color of 304 stainless steel pneumatic butterfly valve was the way to distinguish 304 from 201 pneumatic butterfly valve made of ordinary materials.
Later, I learned that some 201 pneumatic butterfly valves are also very bright in color, while some 304 pneumatic butterfly valves are very dark in color.
In fact, the bright color of stainless steel pneumatic butterfly valves is mainly due to the use of electroplating or polishing, while some 304 stainless steel pneumatic butterfly valves will reduce their luster due to the manufacturing process, such as the use of acid pickling, but the acid and alkali resistance will not be affected.