客户提供的关于阀门安装的说明，求大虾帮忙翻译解释一下 ...？ installation don`t use flange sealings. the seat ring of the butterfly valves has a sealing lip which operates as flange gasket between valve and flange during mounting. • insert the valve with the disc in the nearly closed position between the flanges. lf the flanges are located too closely in an existing pipe, they must be so spreaded by means of a special device that the valve can be easily installed with clearance . • mount the flange boits and centre and align the valve between the flanges. hand-screw the flange bolts. spot weld the flanges to the pipe . • before cross-tightening the flange bolts uniformly, it must be ensured by the test actuation that the valve disc can move freely within the connecting flanges . attention! in case of improper insertion of the disc between the flanges, the seat ring may be displaced and destroyed during the first operations. similarly, the sealing strip of the valve disc can be damaged if it is not observed that the disc can move freely between the flanges. 安装 要使用法兰密封条。在安装过程中，蝶阀阀座圈有密封唇口，在阀门和法兰中间。 在阀瓣在几乎关闭的状态时在法兰处插入阀门，在现有的管线上如果法兰处于紧紧地黏贴状态,必须用特殊的设备将其打开,以便将阀门很容易安装在法兰之间的间隙里。 安装阀门，调整阀门和法兰，使其和管线的中心线一致，紧固法兰螺栓，并现场焊接的管道法兰。 在紧固法兰螺栓之前,必须保证在连接的法兰内阀门的阀瓣可以自由转动。 注意!在刚才的操作中，万一不当的阀瓣插入阀座环法兰时,可能会使阀座圈移位，甚至对其产生伤害！同样,如果在法兰内观察不阀门的自由转动，阀门的密封带会损坏。 查看更多
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