The ball valve is one of many products of Kunshan Lianggong valve, so the following shall be paid attention to during the installation of the ball valve

问题，以避免造成不必要的损失。

Problems to avoid unnecessary losses.

安装前的准备

Preparation before installation

⑴ 球阀前后管线已准备好。前后管道应同轴，两法兰密封面应平行。管道应能 承受球阀的重量，否则管道上必须配有适当的支撑。

(1) the front and rear pipelines of the ball valve have been prepared. The front and rear pipes shall be coaxial, and the sealing surfaces of the two flanges shall be parallel. The pipeline shall be able to bear the weight of the ball valve, otherwise the pipeline must be equipped with appropriate support.

⑵ 把阀前后管线吹扫干净，掉管道内的油污焊渣和一切其它杂质。

(2) purge the pipelines in front of and behind the valve to remove oil, welding slag and all other impurities in the pipeline.

⑶ 核对球阀的标志查明球阀完好无损。将阀全开全闭数次证实其工作正常。

(3) check the mark of the ball valve and find out that the ball valve is intact. Fully open and close the valve for several times to confirm its normal operation.

⑷ 拆去球阀两端连接法兰上的保护件。

(4) remove the protective parts on the connecting flanges at both ends of the ball valve.

⑸ 检查阀孔可能有的污物，然后清洗阀孔。阀座与球之间即使仅有微小颗 粒的异物也可能会损伤阀座密封面。

(5) check the valve hole, remove the possible dirt, and then clean the valve hole. Even small particles of foreign matter between the valve seat and the ball may damage the sealing surface of the valve seat.

开始安装球阀

Start installation of ball valve

⑴ 把阀装上管线。阀的任何一端都可装在上游端。用手柄驱动的阀可安装在管 道上的任意位置。但带有齿轮箱或气动驱动器的球阀应直立安装，即安装在 水平管道上，且驱动装置处于管道上方。

(1) install the valve on the pipeline. Either end of the valve can be installed at the upstream end. The valve driven by the handle can be installed at any position on the pipeline. However, ball valves with gear boxes or pneumatic actuators shall be installed vertically, i.e. on horizontal pipelines with the driving device above the pipeline.

⑵ 阀法兰与管线法兰间按管路设计要求装上密封垫。

(2) the sealing gasket shall be installed between the valve flange and the pipeline flange according to the pipeline design requirements.

⑶ 法兰上的螺栓需对称逐次均匀拧紧。

(3) the bolts on the flange shall be tightened symmetrically and evenly one by one.

⑷ 连接气动管线(采用气动驱动器时)。

(4) connect pneumatic pipeline (when pneumatic driver is adopted).

昆山良工球阀安装后的检查

Inspection of Kunshan Lianggong ball valve after installation

⑴ 操作驱动器启闭球阀数次，应灵活无滞涩，证实其工作正常。

(1) operate the driver to open and close the ball valve for several times, which shall be flexible without stagnation, and confirm its normal operation.

⑵ 按管路设计要求对管道与昆山良工球阀间的法兰结合面进行密封性能检查。

(2) check the sealing performance of the flange joint surface between the pipeline and Kunshan Lianggong ball valve according to the pipeline design requirements.

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