Factors that determine the structural limits of electric butterfly valve
As one of the components used now, electric butterfly valve is different from the pneumatic butterfly valve, added a lot of electronic components to attain the purpose of fine control. Therefore, electric butterfly valve has limitations in many industries or conditions. This is also due to structural constraints. For example, in the simplest high-temperature industry, because the high temperature will cause damage to electronic components, it is clearly not allowed to use it. This is also for the sake of safety. There is also a more typical chemical enterprise, some use of highly corrosive ingredients of the company. Because a small amount of highly corrosive liquid can lead to failure of electronic components, it can not be widely used. Therefore, when choosing, we need to pay attention to the influence of various factors to ensure that electric butterfly valve can play its role.
Pay attention to the following two points of the installation of electric butterfly valve
1. The installation position, height and direction of the inlet and outlet must meet the design requirements. It should be noted that the direction of medium flow should be consistent with the arrow direction marked on the valve body, and the connection should be firm and tight.
2. Visual inspection must be carried out before the installation of the electric butterfly valve. The nameplate of the valve shall comply with the provisions of the current national standard “General Valve Marking” GB 12220. For the valves with working pressure greater than 1.0 MPa and with cut-off effect on the main pipe, we should conduct strength and tightness performance test before installation. During the strength test, the test pressure is 1.5 times of the nominal pressure, and the duration is no less than 5min. The valve shell and packing shall be qualified to confirm whether there is no leakage. During the tightness test, the test pressure is 1.1 times of nominal pressure.
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