Butterfly valve is a general term, also known as flap valve. If further subdivided, butterfly valves can be divided into many types. Different types of butterfly valves have different operating conditions and produce different effects.

Below, we will analyze the functions of butterfly valves based on several common types of butterfly valves, including soft sealed butterfly valves, hard sealed butterfly valves, signal butterfly valves, and aluminum alloy butterfly valves.

Soft sealed butterfly valve

Soft sealed butterfly valves refer to butterfly valves with rubber or fluoroplastic sealing surface materials, which have good sealing performance. Rubber sealed soft sealed butterfly valves are often used in weakly acidic and alkaline medium pipelines such as water, oil, and steam, and are more commonly used in water system projects. Butterfly valves sealed with fluoroplastics are used in pipelines with corrosive media, such as in the petrochemical industry.
The disadvantage of soft sealed butterfly valves is that they are not resistant to high temperature and high pressure.

Hard sealed butterfly valve

The sealing of hard sealed butterfly valves is made of hard alloy or stainless steel, which can withstand high temperature, high pressure, and wear resistance. It can be used in industries such as petroleum, metallurgy, and coal mining.
The disadvantage of a hard sealed butterfly valve is its poor sealing performance.

Signal butterfly valve
The signal butterfly valve is closely related to the fire protection system and is mainly installed in buildings. It is connected to the fire alarm system and provides operation monitoring alarm signals for the fire protection system. The signal butterfly valve is always in an open state in daily life. If someone accidentally closes it, it will affect the use of fire extinguishing in the event of a sudden fire. The main function of the signal butterfly valve is to be used for fire alarms.

Aluminum alloy butterfly valve
The butterfly valve body is made of aluminum alloy material, suitable for air conditioning and industrial water treatment equipment, and has strong anti condensation function. The use of aluminum alloy die cast valve bodies can effectively prevent corrosion.