The valve Object is a basic component of any subsea control system. Subsea and surface trees have a large variety of valve configurations and combinations of manual and / or actuated (hydraulic or pneumatic) valves. Implementation shall ensure adherence to Mandatory [M] aspects in order to comply with the MDIS interface standardisation. Optional [O] may or may not be implemented within a project. Figure 15 provides an overview of the MDISValveObjectType as defined by MDIS. The figure includes all items inherited from the MDISBaseObjectType. It illustrates that an interlock might have one or more Interlockvariables associated with it, or that they might not have an actual interlock associated.

Figure 15 - Valve Object Overview