Ventilation Butterfly Valve
Structural Features And Uses
The ventilation butterfly valve is made of the same material as the fish valve body and is processed into a sealing ring. Its operating temperature depends on the valve body material. The nominal pressure is <0.6MPa. It is generally suitable for ventilation and regulating medium flow in industrial, metallurgical, environmental protection and other pipelines. Its main features for:
1. Novel and reasonable design, unique structure, light weight, quick opening and closing
2. The operating torque is small, easy to operate, labor-saving and dexterous.
3. Use suitable materials to meet different medium temperatures of low, medium and high as well as corrosive media, etc.
Butterfly Valve Sealing Material Selection And Applicable Temperature
Precautions For Installation Of Ventilation Butterfly Valve
The installation position of the ventilation butterfly valve in the pipe network and the layout of the pipe network also have an impact on the use of the valve. Pipes with large smoke and dust are designed with a closed funnel at the valve opening end or the valve connection corner. Regular dust removal can prevent excessive dust accumulation, which is beneficial to The rotation of the butterfly plate. Several issues should be paid attention to when installing ventilation butterfly valves
1. When using metal gaskets, the load must be ensured uniformly to avoid the influence of temperature and dead weight or the stress generated by welding from bringing additional pressure to the valve and deforming the valve flange and pipeline.
2. When the valve is installed in a long pipeline, a support frame should be installed.
3. When installing the valve, attention should be paid to the flow direction of the medium, so that the opening direction of the butterfly plate is consistent with the flow direction of the pipeline medium, which is conducive to the self-cleaning effect of the medium flow rate.
4. Strengthen the protection of the overall insulation layer of the pipe network to keep the pipe wall temperature above the dew point, which can reduce low-temperature adhesive dust accumulation. If the pipe wall temperature is higher than the acid dew point of the flue gas, it can avoid the condensation of acid vapor on the heated pipe wall and control the generation rate of sulfur trioxide, so the valve will be more effective.
Ventilation butterfly valves can be installed in different positions depending on the design of the pipeline, such as horizontally, vertically, and at corners. Generally, ventilation butterfly valves installed on vertical pipes have better results and are less likely to accumulate dust, followed by horizontal pipes, and corners have the worst effect. The corners on both sides of the valve inlet and outlet are most likely to cause bias flow and dust blockage, and the valve operating torque will increase.
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