English
English
Butterfly valve is a type of valve with a simple structure and quick opening and closing. Its closing element is a disc-shaped butterfly plate that rotates around the valve stem to achieve opening and closing. Butterfly valves are widely used in many industries due to their small size, light weight, and low flow resistance. The following are the main application areas and scenarios of butterfly valves.
1、 Water supply and treatment industry
Butterfly valves are widely used in water systems. Butterfly valves are commonly used to cut off and regulate medium flow at locations such as urban water supply networks, secondary water supply in residential areas, and pump station outlets. Due to its fast opening and closing speed, butterfly valves are particularly suitable for situations that require frequent operation. Butterfly valves, with their advantages of corrosion resistance and light weight, have gradually replaced traditional gate valves in the raw water inlet pipe, sedimentation tank sludge discharge pipe, and filter backwash pipe of water treatment plants. In the circulating cooling water system, large-diameter butterfly valves are also widely used for controlling the inlet, outlet, and bypass pipelines of cooling towers.
2、 Sewage treatment field
The sewage medium contains a large amount of suspended solids and fibrous impurities, and ordinary valves are prone to blockage or wear. The flow channel of butterfly valves is simple, and after the butterfly plate is opened, the medium basically passes through in a straight line, which is not easy to block debris. Therefore, it has been widely used in sewage treatment plants. From the inlet channel behind the coarse grille, to the inlet pipeline of the aeration tank, and then to the discharge pipeline of the sludge dewatering room, butterfly valves can all work stably. For highly corrosive wastewater environments, rubber lined butterfly valves or stainless steel butterfly valves are usually selected to enhance their corrosion resistance.
3、 Heating and air conditioning system
In centralized heating systems, butterfly valves are often installed on the primary and secondary pipelines of the thermal inlet and heat exchange station to cut off or regulate the flow of hot water. Butterfly valves are lightweight and have a small installation space, making them particularly suitable for compact underground heat exchange stations. Butterfly valves are also commonly used in the chilled water and cooling water pipelines of central air conditioning systems for cutting off branch pipes and isolating equipment on each floor. Due to the frequent start and stop operations of heating and air conditioning systems, the fast opening and closing characteristics of butterfly valves can meet this demand.
4、 Fire protection system
In automatic sprinkler systems and fire hydrant systems, signal butterfly valves are common matching valves. This butterfly valve is equipped with an opening and closing signal feedback device, which can transmit the real-time opening or closing status of the valve to the fire control center, ensuring that the fire pipe network is always in normal working condition. Butterfly valves have a small volume, are easy to install in fire pipeline wells, and require effortless opening and closing operations. They are widely used in locations such as fire pump room outlet pipes, front ends of alarm valve groups, and main pipes in various zones.
5、 Chemical and pharmaceutical industry
The media in chemical production often have corrosive, toxic, or flammable and explosive characteristics, which require high sealing and corrosion resistance of valves. Butterfly valves can choose different valve body materials and sealing materials according to the characteristics of the medium. For corrosive media such as acid and alkali, fully lined fluorine butterfly valves or plastic butterfly valves can be used; For organic solvents, stainless steel butterfly valves can be used in conjunction with polytetrafluoroethylene seals. Butterfly valves have a simple structure and are not prone to residual materials inside. They also meet the hygiene and cleanliness requirements of the pharmaceutical industry and are commonly used in drug delivery pipelines and clean pipeline systems.
6、 Food and Beverage Industry
In food processing, dairy products, beer and beverage production, pipeline systems need to be regularly cleaned and disinfected, and high hygiene performance is required for valves. Sanitary grade butterfly valves are made of stainless steel material, with polished inner surfaces that have no dead corners and are not prone to bacterial growth. The valve body adopts a clamp type connection, which is easy to disassemble and assemble, and convenient for daily cleaning and maintenance. Butterfly valves are widely used in milk conveying pipelines, beer fermentation tank inlet and outlet pipes, juice blending systems, and other links.
7、 Metallurgy and Power Industry
In the metallurgical industry, butterfly valves are used in cooling water systems for blast furnaces, secondary cooling water systems for continuous casting machines, and descaling water systems on steel rolling production lines. These operating conditions often require high pressure resistance and wear resistance of valves. In thermal power plants, butterfly valves are used in large-diameter low-pressure pipelines such as circulating water systems, condensate water systems, and auxiliary cooling water systems. For the slurry medium in the flue gas desulfurization system, wear-resistant rubber lined butterfly valves or alloy butterfly valves are used.
8、 Ship and Ocean Engineering
The advantages of the ship's ballast water system, fire water system, and cooling water system, such as dense pipelines and narrow space, and the light weight and small space occupied by butterfly valves, are fully utilized here. Marine butterfly valves are usually made of bronze or nickel aluminum bronze materials, which have good resistance to seawater corrosion. In addition, butterfly valves can be operated in various ways, including handles, worm gears, pneumatic or electric drives, making it easy to achieve local or remote control at different positions on each deck of the ship.
9、 Ventilation and dust removal system
Butterfly valves are not only suitable for liquid media, but also widely used for gas media. Butterfly valves are commonly used as air volume control valves in industrial ventilation ducts, dust removal systems, and flue gas discharge pipelines. By adjusting the opening angle of the butterfly plate, the air volume can be controlled. Due to the low corrosiveness of gas media to valves, butterfly valves made of ordinary carbon steel or galvanized steel plates are usually sufficient to meet the requirements. In the smoke exhaust systems of large commercial buildings and underground garages, there are also dedicated fire-resistant and smoke exhaust butterfly valves.
10、 Key selection points under different working conditions
Although butterfly valves have a wide range of applications, they also need to be selected reasonably according to specific working conditions. For room temperature clean water media, ordinary rubber sealed butterfly valves can meet the requirements. For high-temperature steam or hot oil media, it is necessary to use metal hard sealed butterfly valves that are resistant to high temperatures. For abrasive working conditions containing granular media, butterfly valves with wear-resistant lining rubber or hard alloy sealing surfaces should be selected. For situations where precise flow regulation is required, butterfly valves with worm gear reduction mechanisms should be selected to maintain a stable opening. For working conditions that require frequent remote control, electric or pneumatic butterfly valves should be selected and equipped with corresponding control devices.
summary
The application of butterfly valves covers multiple industries such as water supply and drainage, sewage treatment, heating and air conditioning, fire protection, chemical and pharmaceutical, food and beverage, metallurgy and power, ship engineering, ventilation and dust removal, etc. The reason why butterfly valves are widely used is mainly due to their comprehensive advantages such as compact structure, light weight, rapid opening and closing, low flow resistance, and relatively low price. Whether as a shut-off valve or a regulating valve, butterfly valves can replace bulky and heavy gate valves and globe valves in many situations. In practical applications, the appropriate butterfly valve type and sealing material should be selected based on the characteristics of the medium, working pressure, working temperature, and operating requirements in order to fully leverage the advantages of butterfly valves.
