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What is the wafer butterfly valve?

Jun 20,2018 Posted by Bundor

Industry News

What is the wafer butterfly valve? The wafer type butterfly valve is a type of butterfly valve. It is a butterfly valve with a connection type of a wafer type. It is also one of the most commonly used butterfly valve products in engineering pipelines. The other type most commonly used is the flanged butterfly valve. Will be introduced later for everyone. In addition, the connection of butterfly valves includes welding, clamps, threads, etc., but these are not commonly used in production lines. This article will give you a full overview of 

what is a wafer type butterfly valve.

​The wafer butterfly valve is a valve with a wide range of uses. With different valve materials and different driving forms, the wafer butterfly valve can adapt to many different working conditions and different media. Wafer type butterfly valve has soft seal and hard seal according to the seal ring material. The sealing performance of the soft-sealed wafer type butterfly valve is superior, but due to the limitations of the sealing material, it cannot be used on high temperature and high pressure pipelines. The hard-sealed wafer type butterfly valve is made of metal and which have strong high temperature and high pressure resistance, but the sealing performance is not particularly good.

Description of the main components of the wafer type butterfly valve

Body: Gray cast iron, ductile iron, cast steel, stainless steel, etc.

Butterfly board: ductile iron, cast steel, stainless steel, etc.

Stem: Usually stainless steel;

Seat: soft seal (EPDM, nitrile rubber, PTFE, etc.), hard seal (carbide).

Wafer-type butterfly valve drive forms: handle transmission, turbine drive, pneumatic, electric and so on. One of the two handles and the turbine is a manual drive. Pneumatic and electric drives are automatic valves. They are usually used in environments where manual operation is not possible or there is a certain risk.

The wafer type butterfly valve is shorter in structure and smaller in size than other connected types of valves and is suitable for installation in a space-constrained environment. 

What should you watch out for when installing wafer butterfly valves?

1. Before installation, clean the sealing surface of the valve and the inside of the pipe, so that no dust and impurities are present.

2. The wafer butterfly valve needs to use the special flange for the wafer butterfly valve. When installing, the flange hole position must be aligned with the “ear” hole of the valve, and the flange piece and the valve seal ring should be pressed tightly.

3. After the valve is fixed in the pipeline, several valve switching tests must be done to observe if there is any jamming during the butterfly board switch process.

4. When installing the electric or pneumatic actuator for the butterfly valve, pay attention to the position of the actuator and the butterfly plate, and open the assembly of the opening, closing and closing. After assembling and debugging, install it on the pipeline.

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