Ball valve

Subsea fully welded trunnion ball valve



Valve design

based on API 6DSS and customer requirements

Temperature range
-76 to 410°F (-60 to 210°C)

NPS 2-48 (DN 50-1200)

Pressure rating

ASME 150-ASME 2500

As per API 6D standard
End connections

RF, RTJ as per B16.5 &B16.47
BW, Butt Welded as per B16.25
Hub connection
SW, Socket Welded as per B16.11

Body design

Forged welded two-piece and three-piece

Seat design

Soft or metal seated with hard facing on ball and seats
Self relieving seats
Double piston seats 


Double block and bleed design (DBB)
Anti-static device
Anti-blowout stem
Dynamic seals in O-ring/lip seal configuration
CRA overlay on all dynamic sealing areas or on all wetted parts available


Manual: Gear with ROV receptacle or handwheel 
Actuated: Hydraulic with or without ROV receptacle / handwheel override
baric compensator for operators

Testing & certifications

Compliance with API 6DSS Inspection and testing
SIL 3 Certification as per IEC61508
PED 2014/68/UE
Hyperbaric validation testing as per API 6DSS (available on request)
Cap test as per API 6DSS (available on request)

Subsea fully welded ball valves are suitable in water depths to 500 mt (1700 fit) and maintain an average service life of 25 years. Valves are designed with two or three fully welded forged pieces with a solid double trunnion configuration and two independent seats with bidirectional sealing ensuring the greatest level of tightness and reliability under high pressure and temperature conditions in all critical isolation services. The fully welded body construction ensures a lighter solution and avoids potential leak paths to the external environment. As a result, the valves are an excellent choice in marine and subsea pipelines. Subsea fully welded trunnion ball valves may be completed with a subsea gear and ROV receptacle for remote operation by ROV or with a handwheel for manual operation by the diver. As an alternative, valves can be fitted with hydraulic subsea actuators, fully compensated in a double or single acting configuration, with or without ROV override.