原文：
一、确认球阀在安装前的准备工作 1、保证球阀安装位置管线在同轴位置上，管线上两片法兰应保持平行，确认管线能够承受球阀自身重量，如果发现管线不能承受球阀重量，则在安装前为管线配备相应的支撑。 2、确认管线内是否有杂质、焊渣等，必须要把管线内吹扫干净。 3、核对球阀铭牌，并对球阀进行全开全闭数次操作，确认阀门能够正常工作，再全面检查一次阀门的各个细节，保证阀门完好无损。 4、除去阀门两端的保护盖，检查阀体内是否干净，清洗阀体内腔，由于球阀的密封面是球形状，即使微小的杂物也可能造成密封面的损伤。 二、球阀的安装 1、球阀的任何一段都可安装在上游端，手柄球阀可以安装在管线的任何位置，如果配置执行机构(如齿轮箱、电-气动执行器)的球阀，则必须垂直安装，阀门进出口处在水平位置上。 2、球阀法兰与管线法兰间按管路设计要求装上密封垫。 3、法兰上的螺栓需对称、逐次、均匀拧紧。 4、如果球阀采取气动、电动等执行器时，按说明书完成气源、电源的安装。 三、球阀安装后的检查 1、安装完毕后，启动球阀开、关数次，应该动作灵活，受力均匀，球阀工作正常。 2、根据管道压力设计要求，通压后检测球阀与管道法兰结合面的密封性能。 四、球阀的维修 1、只有卸除球阀前后的压力，才能对球阀进行拆卸分解操作。 2、在对球阀的分解与再装配过程，需要对有密封性零部件的保护，特别是非金属零部件，像O型圈等部件{zh0}使用专用的工具。 3、球阀阀体重新装配时螺栓必须对称、逐步、均匀地拧紧。 4、清洗剂应与球阀中的橡胶件、塑料件、金属件及工作介质(例如燃气)等均相容。工作介质为燃气时，可用汽油(GB484-89)清洗金属零件。非金属零件用纯净水或酒精清洗。 5、分解下来的单个零件可以用浸洗方式清洗。尚留有未分解下来的非金属件的金属件可采用干净的细洁的浸渍有清洗剂的绸布(为避免纤维脱落粘附在零件上)擦洗。清洗时须去除一切粘附在壁面 上的油脂、污垢、积胶、灰尘等。 6、非金属零件清洗后应立即从清洗剂中取出，不得长时间浸泡。 7、清洗后需待被洗壁面清洗剂挥发后(可用未浸清洗剂的绸布擦)进行装配，但不得长时间搁置，否则会生锈、被灰尘污染。 8、新零件在装配前也需清洗干净。 9、使用润滑脂润滑。润滑脂应与球阀金属材料、橡胶件、塑料件及工作介质均相容。工作介质为燃气时，可用例如特221润滑脂。在密封件安装槽的表面上涂一薄层润滑脂，在橡胶密封件上涂一薄 层润滑脂，阀杆的密封面及摩擦面上涂一薄层润滑脂。 10、装配时应不允许有金属碎屑、纤维、油脂(规定使用的除外)灰尘及其它杂质、异物等污染、粘附或停留在零件表面上或进入内腔。

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译文：
First, confirm that ball preparations before installation 1, to ensure pipeline ball valve installation position in coaxial position, the pipeline should be kept parallel to the flange 2, to confirm its own pipeline to withstand the weight of ball valve, ball valve if they can not bear the weight of pipeline, the pipeline before the installation with the corresponding support. 2, confirm whether there are impurities in pipelines, welding slag, etc., must be necessary to purge a clean pipelines. 3, check valve plate, and the ball valve fully open all closed several operations, confirmed the valve to work properly, then a comprehensive inspection once all the details of the valve to ensure the valve intact. 4, remove the valve protection cap on both ends, check valve body is clean, clean body cavity, due to the sealing surface is a spherical ball shape, even small debris can also cause sealing surface of the injury. Second, the installation of ball valves 1, ball valve can be installed in any section of the upstream end of the valve handle can be installed anywhere in the pipeline, if configured implementing agencies (such as gear boxes, electric - pneumatic actuator) of the ball, it must be mounted vertically, the valve the level of import and export position in the door. 2, ball valve between the flange and pipe flange design by piping installed gasket. 3, flange bolts need to symmetry, successive, evenly tightened. 4, if the ball valve to pneumatic and electric actuators such as when, according to the instructions to complete gas supply, power supply installation. Third, after the check valve installed 1 After installation, start the ball valve opening and closing several times, action should be flexible and balanced force, ball valve is working properly. 2, according to the pressure piping design requirements, through pressure valve and the pipeline after detection of the Flange sealing performance. 4, ball valve repair 1, only the removable valve pressure before and after, to the ball valve and disassemble the operation. 2, in the ball of the decomposition and re-assembly process, the need for a seal to protect components, especially non-metallic parts, components such as O-ring is best to use special tools. 3, ball valve re-assembly bolts to be symmetrical, gradually, evenly tighten. 4, cleaning agents should be in the rubber ball, plastic parts, metal parts and the working medium (eg gas) are thus compatible. Working medium for the gas, the available gas (GB484-89) cleaning metal parts. Non-metal parts cleaning with pure water or alcohol. 5, individual components can be decomposed down mode with immersion cleaning. Not yet left down decomposition of non-metallic parts can be used to clean small metal parts cleaning of silk impregnated with cleaning agents (in order to avoid adhesion of the parts on the fiber loss) scrub. When cleaning is necessary to remove all the adhesive on the wall The grease, dirt, rubber product, dust and so on. 6, non-metallic parts should be cleaned immediately removed from the cleaning agent, not a long soak. 7, need to be cleaned by washing the wall after volatile cleaning agent (cleaning agent can not dip silk rub) for assembly, but not a long time on hold, otherwise it will rust, the dust pollution. 8, before the new parts in the assembly also need clean water. 9, use grease lubrication. Grease ball should be metal, rubber, plastic components and are compatible with the working medium. Working medium for the gas, the 221 can be used such as special grease. Seals installed in the groove on the surface of a thin layer of grease coated in rubber seal on a thin coating Layer of grease, valve stem sealing surface and the friction surface coating a thin layer of grease. 10, the assembly should be allowed to have metal fragments, fiber, fat (except for the requirement to use) dust and other impurities, foreign matter contamination, adhesion, or remain in the part surface, or into the lumen.