Slowly open all ball valves to relieve air and water pressure. Loosen bolts on groove coupler and remove groove couple and cover plate from valve body.

 
  • 慢慢开启所有球阀,释放空气和水的压力。松开沟槽连接器上的螺栓,从阀体上拆卸沟槽连接器和盖板。
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