| 摘要 |
A valve (1) having at least one flange portion (2, 3) for securing to a wellhead Christmas tree (5) for shutting off a pipe outlet (50) from the wellhead Christmas tree (5). At least one of the flange portions (2) includes integrated devices (6a, 6b, 6, 14, 15) for operation of a second unit (10) mounted outside the valve (1). |
