Butterfly Valve
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Ventilation butterfly valve is a simple regulator, which can also be used to control the switch of low-pressure pipeline medium The following is a detailed introduction to the ventilation butterfly valve:
Basic definition
Ventilation butterfly valve is a kind of non-closed butterfly valve, which is mainly used as a pipe control device for regulating flow or cutting off gas medium in dusty cold air or hot air pipe of ventilation and environmental protection engineering in chemical, building materials, power station glass and other industries.
Structural characteristics
Compact structure: The ventilation butterfly valve adopts a new structure form of welding midline butterfly plate and short structural steel plate, which is compact in structure, light in weight and easy to install.
Low flow resistance: Design so that the flow resistance is small when passing through contributes to the energy consumption of the system.
Long service life: There are no connecting rod bolts and other components to improve the failure rate and service life.
Easy operation: The driving torque small switch is flexible and convenient to operate.
Working principle
The working principle of ventilation butterfly valve is simple and efficient, and the circulation of medium is controlled mainly by rotating valve plate When the valve plate and the valve seat are closely attached, the valve closing medium cannot pass; When the valve plate rotates at a certain angle, the valve opens and the medium circulates Because the valve plate has the same flow direction as the medium in the rotating process, the resistance generated is small, which is beneficial to the smooth flow of the medium.
Classification
Ventilation butterfly valves can be classified according to different types, mainly including:
According to driving: divided into manual butterfly valve, electric butterfly valve, pneumatic butterfly valve, etc.
According to the structure: such as center seal butterfly valve, single eccentric seal butterfly valve, etc.
Press connection: For example, butterfly valve flange butterfly valve, etc.
Application field
Ventilation butterfly valves are widely used in various industries and fields including but not limited to:
Chemical engineering: used to control the gas flow during chemical reaction.
Electricity: used in steam pipes in thermal power plants, nuclear power plants and other places.
Food processing: Used to control and cut off the flow rate of air and other media during food processing.
Pharmaceutical industry: used for airflow regulation and truncation in pharmaceutical factories.
Metallurgy: Gas flow control and truncation in iron and steel smelting process.
Paper industry: used for air flow regulation and truncation in paper production line.
Advantages and disadvantages.
Advantages
Simple structure, small volume, light weight, convenient installation and use.
Quick operation and labor saving are suitable for opening and closing occasions.
Good adjustment performance can be adjusted by changing the rotation angle of butterfly plate.
Wide application range, can be used in various media and working conditions.
Disadvantages
Relatively poor sealing performance has certain leakage risk.
Small operating pressure and temperature range may not be suitable for high pressure or high temperature conditions.
The butterfly plate is greatly affected by medium scouring. Long-term use or medium scouring may cause damage to the butterfly plate, which needs regular inspection and replacement
To sum up, the ventilation butterfly valve has a wide range of application value in many industries and fields, but it needs to be comprehensively considered according to specific working conditions and needs when selecting and using it.
Butterfly Valve
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