First, to confirm the preparation of the ball valve before installation 1, to ensure that the ball valve installation position of the pipeline in the coaxial position, the pipeline should be kept parallel to the two flanges to confirm that the pipeline can withstand the weight of the ball valve, if it is found that the pipeline can not withstand the ball valve weight, Equipped with appropriate support for the pipeline before installation. 2, confirm whether there are impurities in the pipeline, welding slag, etc., must purge the pipeline clean. 3, check the ball valve nameplate, and the ball valve fully open all closed several times to confirm the valve to work properly, and then a comprehensive inspection of the valve details, to ensure that the valve intact. 4, remove the protective cover at both ends of the valve, check the valve body is clean, clean the body cavity, the ball valve sealing surface is spherical, even tiny debris may also cause sealing surface damage. Second, the ball valve installation 1, the ball valve can be installed in any section of the upstream end, the handle ball valve can be installed in any position of the pipeline, if the actuator (such as gearbox, electric - pneumatic actuator) ball valve, you must install vertically , The valve import and export at a horizontal position. 2, the ball valve flange and pipe flange according to the pipeline design requirements installed gaskets. 3, the flange bolts must be symmetrical, one after another, even tighten. 4, if the valve to pneumatic, electric and other actuators, according to the instructions to complete the gas source, power supply installation. Third, check the ball valve installation 1, after the installation is complete, start the ball valve open, off several times, should be flexible action, uniform force, the ball valve is working properly. 2, according to the pipeline pressure design requirements, after the pressure test the ball valve and pipe flange surface sealing performance. Fourth, the maintenance of the ball valve 1, only the pressure before and after the removal of the ball valve, the ball can be demolished decomposition operation. 2, the ball valve decomposition and reassembly process, the need for the protection of airtight parts, especially non-metallic parts, such as O-rings and other components is best to use a dedicated tool. 3, the ball valve body reassembly bolts must be symmetrical, step by step, evenly tightened. 4, the cleaning agent should be ball valve rubber parts, plastic parts, metal parts and working medium (such as gas) are compatible. Working medium for gas, gasoline (GB484-89) can be used to clean metal parts. Non-metallic parts with pure water or alcohol cleaning. 5, the decomposition of a single part can be cleaned with immersion. Non-metallic parts that remain undistracted may be cleaned with a clean, fine, silk-dipped cleaning cloth (to prevent the fibers from sticking to the parts). Cleaning to remove all adhesion on the wall of grease, dirt, glue, dust and so on. 6, non-metallic parts should be removed immediately after cleaning agent, not for a long time immersion. 7. After cleaning, it needs to be assembled after the wall cleaner to be washed (can be rubbed with silk cloth without cleaning agent), but should not be shelved for a long time; otherwise, it will rust and be polluted by dust. 8, new parts also need to be cleaned before assembly. 9, use grease lubrication. Grease should be ball valve metal materials, rubber parts, plastic parts and working medium are compatible. When the working medium is gas, for example, special 221 grease. Apply a thin layer of grease to the surface of the seal mounting groove and a thin layer of grease on the rubber seal. Apply a thin layer of grease to the sealing and friction surfaces of the valve stem. 10, the assembly should not allow metal debris, fiber, grease (except the provisions of the use of) dust and other impurities, foreign body pollution, adhesion or stay on the surface of the parts or into the lumen.
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