With the continuous improvement of Roots blower equipment industry, a variety of Roots blower equipment has been developed. One type of Roots blower may have several different materials. The vacuum pump manufacturer will tell you about the roots blower made of stainless steel and cast iron.
Although the two types of Roots blower are the same, there are still some differences between them. Otherwise, they can not be made into roots blower equipment and named with different names. What are the specific manifestations of this difference?
The corrosion resistance is different: the stainless steel fan shell and impeller are made of stainless steel, with strong corrosion resistance. With this performance, it can be used to transport acid gases, such as carbon dioxide, hydrogen sulfide, chlorine, methane, etc., and also can be used to transport alkaline gases, such as ammonia. Generally speaking, roots blower can only transport non corrosive gases such as air and waste gas.
Different sealing methods: stainless steel roots blower adopts mechanical sealing to ensure no leakage. The casting roots blower is sealed by common shell, which is not tight enough.
Different degree of gas purification: Roots blower, milk powder, sugar and other food products used in sewage, power, cement, flour and other industries need gas food level purification, and stainless steel fans are required. As the cast iron roots blower will produce particle wear when running, it will mix into food with the emission of gas. Therefore, stainless steel was selected.
Different selling prices: stainless steel fan is made of stainless steel, which has high cost and is difficult to manufacture. Therefore, the finished product price of stainless steel fan is at least 4-5 times higher than that of cast iron fan.
After looking at the above differences, I believe that you can also distinguish when purchasing. There are still some similarities between the two kinds of Roots blower equipment. They belong to three leaf roots blower, and the shape and structure of Roots blower are the same, belonging to volume fan.