Ventilation butterfly valve

DESCRIBE:The ventilation butterfly valve USES the center line type disc plate and the short structure steel plate welding new structure form design manufacture.

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DETAILS:

The ventilation butterfly valve USES the center line type disc plate and the short structure steel plate welding new structure form design manufacture, the operation is light, is widely used in the low, medium, high different medium temperature and the corrosive medium pipeline, has the control function, but the ventilation butterfly valve use, has 2 points is not to be ignored.

1. Although the ventilation butterfly valve is strictly inspected and tested before leaving the factory, there are also some vibration screw changes during transportation, which need to be adjusted again.If the butterfly plate is not closed properly, turn the screw a little counterclockwise, turn the butterfly plate to the sealing position, and lock the nut when appropriate;If the butterfly plate is closed over position, or the butterfly plate cannot be opened, the screw should be rotated a little, open the butterfly plate and re-close the sealing position, and lock the nut when appropriate.

2, ventilation butterfly valve structure is simple, small volume, light weight, but due to structural design problems, its poor sealing, the use of pressure and operating temperature range is small, its use temperature to ≤300℃, nominal pressure is 0.1mpa.

Do you know what are the standard of ventilation butterfly valve?

The ventilation butterfly valve is used in the dusty cold air or hot air gas pipeline of the ventilation and environmental protection engineering in chemical industry, building materials, power plant, glass and other industries, as the gas medium to regulate the flow or cut off the pipe control device.Valves of this type shall generally be installed horizontally in pipelines.Ventilation butterfly valve is an unsealed butterfly valve, widely used in building materials, metallurgy, mining, electric power and other production process medium temperature ≤300℃ nominal pressure of 0.1mpa on the pipeline, used to connect, open and close or adjust medium quality.

The ventilation butterfly valve is divided into manual and electric transmission, which can be driven by an electric motor or a turbine to drive the actuator, making the disc plate of the ventilation butterfly valve rotate freely within the range of 90° to achieve the purpose of opening and closing or regulating the flow of medium.The main standards of ventilation butterfly valve are:

1. Structure length h:GB/ t12221-1989

2. Design standard :GB/ t12238-1989 JB/ t8692-1998

3. Pressure test :GB/ t13927-1992;JB/T9092-1999