Wafer-type butterfly valves are widely used. With different valve materials and different drive forms, the wafer butterfly valve can adapt to many different working conditions and different media. Wafer type butterfly valve can be divided into soft seal and hard seal according to the material of the sealing ring. The sealing performance of the soft-sealed wafer butterfly valve is superior, but due to the limitation of the sealing material, it cannot be used in high temperature and high pressure pipelines. The hard sealing wafer butterfly valve is made of metal, which can have strong high temperature and high pressure resistance, but the sealing performance is not particularly good.
Introduction to the material of the main parts of the wafer butterfly valve:
Valve body material: cast iron, ductile iron, cast steel, stainless steel, etc.;
Disc: ductile iron, cast steel, stainless steel, etc.;
Stem: usually stainless steel;
Seat: soft seal (EPDM rubber, nitrile rubber, PTFE, etc.), hard seal (hard alloy).
The driving methods of the wafer butterfly valve are: handle drive, worm gear drive, pneumatic, electric, etc. Among them, the first two handles and the worm gear belong to the manual drive form. Pneumatic and electric drives are automatic valves, which are usually used in environments that cannot be manually operated or have certain dangerous conditions.
Compared with valves with other connection forms, the wafer butterfly valve has a shorter structural length and is more compact, which is suitable for installation in a confined space. So what are the advantages and disadvantages of wafer butterfly valve?
Advantages of wafer butterfly valve:
1 The opening and closing is convenient and quick, labor-saving, and the fluid resistance is small, which can be operated frequently;
2 Simple structure, small size, short structure length, small volume and light weight;
3 The opening and closing torque is small, because the discs on both sides of the rotating shaft are basically equally affected by the medium, and the direction of the torque is opposite, so the opening and closing is more labor-saving;
4 The sealing surface material is generally made of rubber and plastic, so the low-pressure sealing performance is good;
5 The operation is flexible and labor-saving. Manual, electric, pneumatic and hydraulic methods can be selected.
Disadvantages of wafer butterfly valve:
Compared with the flanged butterfly valve, the wafer butterfly valve has only four bolt holes up and down. When it is installed on a pipeline with an excessively large diameter, the connection is not stable, so the wafer butterfly valve is not suitable for installation on a pipeline with an excessively large diameter.
The above is all the introduction to "what is a wafer butterfly valve". The editor hopes that through this article, you will have a clearer and more intuitive understanding of "wafer butterfly valve". Of course, if you have purchasing needs in this regard, you are also welcome to call or send an email to discuss cooperation with us.