| 摘要 |
<p>The method involves setting hydrants by blocking a feed line, and disassembling the hydrants. An actuating unit is disconnected, and the disassembled parts are cleaned. A seal seat (7) is ground and/or honed. A sealing piston and mechanically exposed parts are lubricated, and the hydrates are assembled. The sealing piston is interchanged by additional parts. A main isolation device is screwed into a nut thread (6) at a base of the hydrates. The actuating unit is provided on a spindle at an upper end of the hydrants.</p> |
