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Manual of Electric Ventilation Butterfly Valve

by:Sino Valves     2021-11-06
The electric ventilating butterfly valve can electrically adjust the opening and closing degree of the ventilating butterfly valve. (0-180 degree adjustment) The design is novel and reasonable, the structure is special, the weight is light, and the opening and closing is rapid. The operating torque is small, the operation is convenient, and the operation is labor-saving and dexterous. Use suitable materials to meet the requirements of low, medium and high medium temperatures and corrosive mediums. The electric ventilating butterfly valve is designed and manufactured with a new structure that is welded between the center line disc plate and the short structure steel plate, which avoids the influence of high temperature expansion and is easy to operate. There are no connecting rods, bolts, etc., so it works reliably and has a long service life. It can be installed in multiple positions and is not affected by the flow of the medium. It is used in dust-containing cold air or hot air gas pipelines of ventilation and environmental protection projects in chemical industry, building materials, power stations, glass and other industries, as a pipeline control device for regulating flow or cutting off the gas medium. This type of valve should generally be installed horizontally in the pipeline. Instructions for use of electric ventilating butterfly valve: The structural design of the ventilating butterfly valve should be combined with the operating conditions of the valve. 1. Under the smelting conditions with high temperature and high dust content, the design of the ventilation butterfly valve can adopt a flat inclined plate structure. There is a gap between the butterfly plate and the valve body of this structure, and the gap value depends on the valve diameter and workmanship. The operating conditions are determined, generally controlled within 0.5% of the channel area, which can meet the requirements of the ventilation butterfly valve installation, temperature changes in working conditions and melting process requirements. 2. Under the condition of high temperature and low dust content, the design of the ventilation butterfly valve can adopt the vertical plate structure. The sealing surface of the structure is easy to process, and the gap value of the sealing surface is controlled within 0.2% of the channel area. The dimensional accuracy of the valve body and butterfly plate sealing pair can meet the design requirements through mechanical processing. 3. For working conditions with high temperature, low pressure and strict sealing requirements, the design of the ventilation butterfly valve adopts a lever-type plane structure. The sealing pair preparation and butterfly plate running track can meet the technological requirements of high sealing performance pipe network equipment. The main body seal of the ventilation butterfly valve selects different structures according to different working conditions, which is conducive to the production and use of the valve. The shaft end structure design of the ventilating butterfly valve adopts an external support structure with excellent heat insulation and sealing effect, which can realize the function of sealing the second shaft end of the valve and then supporting it, which is convenient for adjustment and will not cause shaft end jam. When the direct connection or the crank connecting rod mechanism is connected with the transmission mechanism, the installation of the heat insulation sleeve can effectively keep away the influence of the high temperature environment on the transmission device, and ensure the normal operation of the valve. The valve body and butterfly plate of large-diameter ventilating butterfly valve should be cast or welded according to the requirements of the working conditions, and ribs should be configured, and reasonable process plans and materials should be selected to improve the rigidity of the product and prevent product deformation. Precautions for installation of ventilated electric butterfly valve: The installation position in the pipe network and the layout of the pipe network also affect the use of the valve. For pipes with large smoke and dust, a closed funnel is designed at the opening end of the valve or the corner of the valve connection. Too much to facilitate the rotation of the butterfly plate. Ventilation butterfly valve installation should also pay attention to several issues 1. The use of metal gaskets must ensure that the load is uniform, and avoid the additional pressure of the valve due to the influence of temperature and dead weight or the stress caused by welding, which will deform the valve flange and pipeline. 2. When the valve is installed in a place with a long pipeline, a support frame should be installed. 3. The valve installation should pay attention 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 so that the pipe wall temperature is above the dew point, which can reduce the low-temperature cohesive dust accumulation. If the pipe wall temperature is higher than the acid dew point of the flue gas, the condensation of acid vapor on the heated pipe wall can be avoided, and the generation rate of sulfur trioxide can be controlled, and the valve will be more effective. Electric ventilation butterfly valve is used in metallurgy, chemical industry, electric power, cement and other industries to ventilate and remove dust. It plays a simple role in regulating the flow and pressure of air, flue gas and dust-containing gas pipelines. The ventilating butterfly valve is welded by wear-resistant materials. It has the characteristics of good wear resistance, stable and reliable work, convenient operation, sensitive action, low leakage rate, long service life, and convenient installation and maintenance. The structural design of the electric ventilation butterfly valve combined with the valve's operating conditions are as follows: 1. Under the smelting conditions with high temperature and high dust content, the design of the ventilation butterfly valve can adopt a flat inclined plate structure. The structure of the butterfly plate and the valve body There is a gap between, and the gap value is determined according to the valve diameter and working conditions. 2. For working conditions with high temperature, low pressure and strict sealing requirements, the design of the ventilation butterfly valve adopts a lever-type plane structure. 3. Under the conditions of high temperature and low dust content, the design of the ventilation butterfly valve can adopt the vertical plate structure. The sealing surface of the structure is easy to process, and the gap value of the sealing surface is controlled within 0.2% of the channel area. The structural design of the electric ventilating butterfly valve combined with the use conditions of the valve is what we all need to master. The ventilating butterfly valve shaft end structure design adopts an external support structure with excellent heat insulation and sealing effects, which can realize the valve's two shaft ends are sealed first Support, easy to adjust function, will not cause shaft end jam. It can be widely used in metallurgy, chemical, electric power, cement and other industries in ventilation and dust removal, air conditioning and environmental protection pipelines, and has a simple adjustment effect on the flow and pressure of air, coal gas, flue gas and dust-containing gas pipelines. The valve is widely used in ventilation and dust removal systems, and is used for flow regulation and interception of dust-containing gas, gas pipelines, ventilation purification devices, flue gas pipelines, etc.
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