SUBSEA VALVES

– Ball, double block and bleed, gate and check valves
– API 6DSS / API 17D
– Design to withstand outside pressure caused by see water column
– Graphite use not allowed
– Rising stem or Outside stem to be protected and isolated
– Non destructive test: API 6DSS
– Special actuators with pressure compensators
– Qualification / Hyperbaric test
– High maintenance cost: reliability