Causes and countermeasures of valve body leakage The valve body of the regulating valve itself is mostly cast, which is easy to generate sand holes during the casting process. These sand holes may cause leakage of the medium of the regulating valve, and the leakage can be found by the hydraulic test. By optimizing the design and manufacturing process of the regulating valve itself, the problem of valve body leakage can be effectively solved.    Causes and countermeasures of valve stem leakage The leakage of the valve stem is caused by insufficient material strength, which makes the valve stem easy to get stuck somewhere, which leads to the valve closing is not tight enough, and the medium can leak from it. To solve the problem of valve stem leakage, it is necessary to use a material with good toughness, and this material also needs to have corrosion resistance and wear resistance. For this reason, austenitic-ferritic duplex stainless steel with strong crevice corrosion resistance can be selected. .  Causes and countermeasures of stuffing box leakage The stuffing box is mainly composed of the following parts, namely the stuffing box, the packing and the packing mat. The stuffing box is used to fill the packing and is usually placed on the valve body. A packing pad is used to support the packing and is usually placed at the bottom of the stuffing box. The traditional filler mostly uses soft filler, and the sealing stress mainly depends on the axial force of the gland, which undoubtedly increases the friction between the valve stem and the filler, and the sealing effect is easily reduced over time. In order to effectively solve the problem of the stuffing box leakage, the forming filler can be replaced by a soft filler, which has better elasticity and compact structure, so it has better sealing property. At present, the widely used forming filler is a flexible graphite ring packing.   Causes and Countermeasures for Leakage of Valve Body Connection The valve body connection mainly refers to the part between the valve body and the valve cover, and the sealing is mainly realized by the flange. Leakage at the valve body joint is mainly caused by the flange sealing surface not meeting the standard, the gasket size or material is in violation of the requirements, and the connecting bolt is not tightened. In order to effectively solve the problem of leakage of the valve body connection part, a bifurcated flat gasket ", O"-shaped sealing ring or a concave-convex flat gasket can be used for sealing. Zen trough refers to placing a flat gasket in a closed tank, which has a higher sealing specific pressure and is generally used for medium and high pressure regulating valves. The “Oâ€-shaped sealing ring can generate large radial pressure without axial loading. It is mostly used for sealing flange joints, which can effectively reduce the flange size and reduce the self-weight of the regulating valve. Concave-convex refers to placing the flat gasket on the flange of the concave-convex surface. Because the sealing groove is stepped, it helps to adjust the disassembly and assembly of the valve.    Conclusion Regulating valves play an important role in the field of instrumentation. As an important factor affecting the performance of regulating valves, it is particularly important that the leakage can meet the application standards. Therefore, it is necessary for the relevant personnel in the industry to have a certain grasp on the method of determining the amount of leakage of the regulating valve. And for the regulator valve manufacturer, if it can be based on the test, it can analyze the cause of the leakage of the regulating valve and propose corresponding countermeasures, which is very helpful for improving the performance of its own products. Surgical Gowns,Disposible Surgical Gowns,Anti-Virus Surgical Gowns,Medical Isolation Surgical Gowns Zhende Medical Co.,Ltd , https://www.zdmedicalproducts.com