Abstract: A locking device for pipes, comprising an inner and an outer pipe provided with adjoining and corresponding circumferential grooves for releasable locking engagement via a locking ring fitted in the grooves and thus releasable locking between the inner and the outer pipe by alteration of the radius of the locking ring, wherein the locking ring has an open section or circle sector along the periphery thereof and is provided, at least at the two radial ends thereof, interrupted by the open section, with two respective guide members comprising respective guide surfaces that are slanted relative to the periphery, and wherein a first one of the guide members is provided with an end stop and a second one of the guide members is provided with a control mechanism protruding through an oblong opening provided through the outer pipe along a portion of its radial groove, wherein the radial displacement of the control mechanism along the oblong opening increases the open section or circle sector of the locking ring while

Abstract: The invention provides a double disc gate valve where the discs are movable in a casing by a disc manipulation structure which can change an orientation of at least one of the valve discs relative to the center plane away from an initial orientation by movement of an outer disc carrier relative to an inner disc carrier. The relative movement between the disc carriers is initiated automatically during opening and closing of the valve. The change in orientation facilitates sealing between the discs and valve seats by a gradually established contact between the discs and the seats and the required opening and closing force may therefore be reduced.

Abstract: A valve system (1) and a fluid flow system, in particular for an offshore installation, with a valve system (1) are disclosed. The valve system (1) comprises a valve housing (2) defining a fluid inlet (3) for receiving a fluid medium, and a fluid outlet (6) for delivering a fluid medium; at least one valve element (7) arranged in an interior part of the valve housing (2), the valve element(s) (7) being movable relative to the valve housing (2), the position of the valve element(s) (7) relative to the valve housing (2) determining a flow rate of fluid medium through the valve system (1) from the fluid inlet (3) towards the fluid outlet (6); a moving mechanism (4) arranged to cause movements of the valve element(s) (7); and a sealing member (5) arranged in an interior part of the valve housing (2), the sealing member (5) being capable of separating the interior of the valve housing (2) into a first part comprising the fluid inlet (3) and the fluid outlet (6), and a second part.

Abstract: The invention provides a double disc gate valve where the discs are movable in a casing by a disc manipulation structure which can change an orientation of at least one of the valve discs relative to the centre plane away from an initial orientation by movement of an outer disc carrier relative to an inner disc carrier. The relative movement between the disc carriers is initiated automatically during opening and closing of the valve. The change in orientation facilitates sealing between the discs and valve seats by a gradually established contact between the discs and the seats and the required opening and closing force may therefore be reduced.

Abstract: A gate valve comprising a first part (10), a second part (12), and inlet/outlet parts (14), wherein the first and second parts define a cavity in the body and where a wedge (18) is movable in said body. The gate valve comprises guiding objects (22; 22?) on generally opposite sides of the wedge for guiding said wedge movement, where a major part of each guiding object is accommodated in the first part, and a portion of the guiding object extends into a region of the cavity defined by the second part, thus essentially overlapping an area of said part. The guiding objects may be releasably mounted or be integral with the valve housing upper part.