In industrial pipeline systems, stop valves are widely used in many fields such as petroleum, chemical industry, electric power, metallurgy and urban construction as a key control equipment. Stop valves are mainly used to cut off, adjust and throttle the medium in the pipeline. Their simple structure, good sealing and convenient flow adjustment make them stand out among many valves and become an indispensable and important component in industrial pipeline systems.
Before installing the stop valve, comprehensive preparations must be made. First, the appearance, brand, model, etc. of the stop valve need to be carefully checked to ensure that it meets the relevant national standards and design requirements. At the same time, the stop valve must also undergo strength tests and sealing tests to verify that its quality is qualified and there is no leakage. In addition, the tools and materials required for installation, such as bolts, nuts, wrenches and sealing materials, should also be prepared in advance.
During the installation process, special attention should be paid to the following key points. First, the installation position and direction of the stop valve should be clear. Normally, the stop valve should be installed on a horizontal pipeline with the valve stem facing up for easy operation and later maintenance. At the same time, ensure that the arrow of the stop valve indicates the correct medium flow direction to avoid operational problems caused by reverse installation. Secondly, before installation, the surface of the pipeline should be cleaned to ensure that it is flat and free of debris to ensure the sealing effect of the stop valve. When connecting the stop valve to the pipeline, an appropriate amount of sealing material (such as polytetrafluoroethylene tape) should be evenly applied to ensure the tightness and sealing of the connection. When tightening the bolts, a wrench or screwdriver should be used to firmly place them in place to avoid over-tightening or over-loosening to prevent damage to the threads or leakage. Finally, after installation, the connection points of the stop valve should be carefully checked to ensure that there is no water leakage. If leakage is found, the threaded connection should be adjusted in time or the sealing material should be re-applied.
When using the stop valve, the operator should pay attention to the following aspects. When opening or closing the stop valve, a slow operation should be adopted to avoid damage to the valve disc or valve seat due to excessive force. At the same time, attention should be paid to the indicator signs of the stop valve to ensure the correctness of the operation. When adjusting the flow, the opening of the stop valve should be adjusted according to actual needs to avoid excessive or too small opening causing unstable flow or valve damage. In addition, the sealing performance and operating status of the stop valve should be checked regularly during use. If leakage or abnormal noise is found, the stop valve should be stopped immediately for inspection and repair.
It should be pointed out that the stop valve will be affected by factors such as medium temperature, pressure and corrosiveness during use. Therefore, when selecting a stop valve, it is necessary to select the appropriate material and structure according to the specific working conditions. For example, in a high temperature and high pressure medium environment, a stop valve resistant to high temperature and high pressure should be selected; in a corrosive medium, a stop valve made of corrosion-resistant material should be selected. In addition, for electric or pneumatic stop valves, it is also necessary to regularly maintain and service their electrical or pneumatic systems to ensure their normal operation.
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