| 摘要 |
A subsea arrangement 1 comprises an external casing 2 and a pressure equalizing valve 10 for equalizing the fluid pressure in an internal space 3 of the casing. The pressure equalizing valve comprises a swing arm 11 and a valve member 12. The swing arm is pivotable under the effect of an external fluid pressure acting on the valve member 12 from a resting position, in which the valve member covers an opening 5 provided in the casing and prevents fluid flow through this opening, to a raised position in which the valve member uncovers the opening and allows fluid to flow from the surÂroundings into the space to equalize fluid pressure when the arrangement is lowered into the sea. The swing arm is pivotable from the raised position to the resting position under the effect of gravity. |
