The sleeve surface processing is discussed, choosing different abrasive, time and pressure will result in different surface shape and rough parameter.
讨论了套筒表面的喷砂处理，选择不同的磨料、时间及压力可得到套筒不同的表面形状及粗糙度。
For ease of installation, insert all flange bolts through the valve flange and then through the sleeve flange, but do not let the bolts extend beyond the surface of the flange rubber (See Figure 4).
为了使安装容易些，可以将所有法兰螺栓穿过阀门法兰，然后穿过套管法兰，但是不要让螺栓超过法兰橡胶表面(参阅图4)。
Shaft sleeve: Sure to change sleeve when its surface is rough and damaged seriously.
轴套：表面粗糙及损伤严重时，更换轴套。
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