Abstract: Arrangement for protecting components such as valves and control units incorporated in subsea structures particularly for hydrocarbon production, including a template structure adapted to rest on the sea bed and provided with supporting members for a number of functional modules, each containing at least one of the components, each being adapted to be retrieved to the surface. Each of the modules is provided with at least one fixed roof element and at least one completely removable roof element, these fixed and removable roof elements together covering substantially the entire top area of the module, and the roof elements of all modules in the subsea structure together cover a major portion of the top area of the subsea structure to protect against objects falling from above or moving along the sea bed, such as trawls or the like.

Abstract: This invention relates to a valve comprising a valve body and a dismountable closing means. The closing means comprises a closing member and a support which carries the closing member is received in an inner cavity in the valve body. Locking of the closing means in the inner cavity is ensured by means of circular grooves formed in a side wall of the cavity, and movable locking pieces carried by the support and cooperating with an exterior ring via can elements. Axial movement of the ring results in a radial displacement of the locking pieces and thereby permitting insertion and removal of said closing means into and out of said valve body.