| 摘要 |
<p>Disclosed is relating to an electrically insulated ball valve device to be interposed between a couple of metallic pipes for supplying fluid so as to electrically insulating the couple of metallic pipes each other. The device includes a valve body (10) having threaded portions (14, 15) formed at its both ends, a valve cap (20) having threaded portions (23, 25) one of which is coupled to one of the threads of the valve body (10) and an insulating layer (24, 42, 52) formed onto any one of said threads thereby electrically insulating the couple of metallic pipes each other without a separate insulating device.</p> |
