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Installation details and tips for pneumatic control valves

2020-11-27View Original

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 It is extremely important to follow the installation guidelines when installing pneumatic control valves; all customers must adhere to them! Today, we will introduce the installation details and tips for pneumatic control valves!   A. The installation guidelines and precautions for pneumatic control valves should always be followed during installation ;   B. The operating temperature of the control valve should be within the range of (-30 to 60), with a relative humidity not exceeding 95% ;   C. There should be straight sections of pipe in front of and behind the control valve, with a length of not less than 10 times the diameter of the pipe (10D), to prevent the short straight sections from affecting the flow characteristics of the valve ;   D. Read the instruction manual before installing the valve. The instruction manual introduces the product, as well as the safety precautions and measures to be taken before and during installation ;   E. Verify pipe cleanliness: Foreign objects in the pipes can damage the sealing surfaces of the valves, or even prevent the movement of the valve stem, ball, or butterfly plate, resulting in the valve not closing properly. To reduce the likelihood of dangerous situations, all pipes must be cleaned before installing the valves.   Confirm that the pipeline dirt, metal debris, slag, and other foreign objects have been removed. Additionally, check the pipe flanges to ensure a smooth gasket surface. If the valve has threaded connections, apply a high-grade pipe sealant to the male threads of the pipe. Do not apply sealant to the female thread, as excess sealant on it will be forced into the valve body. Excess sealant can cause the valve core to get stuck or lead to the accumulation of dirt, thereby preventing the valve from closing properly ;   F. We carefully inspect the control valve: before installation, check and remove all shipping plugs, protective plugs, or covers on the surface of the gaskets, and examine the interior of the valve body to ensure there are no foreign objects present ;   H. The control valve should be installed on a horizontal pipe, perpendicular to the pipe both above and below; it is generally necessary to provide support beneath the valve to ensure stability and reliability. For special occasions where the control valve needs to be installed horizontally on a vertical pipe, it should also be supported (except for control valves with small diameters). During installation, avoid applying additional stress to the control valve ;   G. Ensure there is sufficient space above and below the valve to facilitate the easy removal of the actuator or valve core during inspection and maintenance. For valve bodies with flange connections, ensure that the flange surfaces are accurately aligned so that the gasket surface makes even contact. After aligning the flanges, tighten the bolts gently, and finally tighten them in a cross pattern.

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