Trunnion Valve

 

Trunnion mounted ball valves are custom made with 2-piece or 3-piece bodies per API 6D specifications. These trunnion ball valves are available with soft seats and metal seats. Metal bases designed with ENP or other special coatings to meet abrasive or corrosive requirements.

The ball of a trunnion valve is fixed or constrained at two pivot points (upper and lower stems). When purchased, a bearing is used at the bottom stem (trunnion), allowing only pivoting movement within the body cavity. The upstream seat is a floating seat and process pressure pushes it against the ball's sealing surface. It is also possible to use a spring-loaded seat to pre-stress the seat during assembly. This design exerts constant pressure on the trunnion-mounted ball after it is installed, while the top job applies a load to the entire closure. Cast steel trunnion mounted ball valves typically have soft seats that allow for a gas-tight seal.

 

 

Construction – Split Body, Trunnion Ball

Body Material – Forged/Casting Stainless Steel and Carbon Steel

Seat – Soft or Metal to Metal

Size Range – DN50-DN600

End Connection – Flange, RF, RTJ, BW

Pressure Rating – Class 150-2500

Standard – Design to ASME B16.34, API6D/API608, Flange Dimension to ASME B16.5, Butt Welding to ASME B16.25, Face to face meets ASME B16.10, API6D, and Inspection and testing according to API598 API6D

Temperature Rage – -50°F – 650°F (Soft or Metal Seats)

 

 

 

Design & Manufacture	ASME B16.34/API 6D
Face to Face (End to End)	ASME B 16.10/API 6D
End Flange	ASME B16.5
Butt welded end	ASME B16.25
Test	API 6D
Fire Safe Test	API 607/ API6 FA
Special	NACE MR-01-75

 

 

Torque Operated – Trunnion ball valves can open and close efficiently at full pressure differentials.

Valve sealing - provides the ultimate in proper sealing force when used for high pressure sealing.

High Stability – This is due to its ability to withstand changes and extreme stress.

Spring Seats – Another feature of these valves is the quality of the seat springs. Spring seats are capable of operating in both high and low pressure applications.

 

 

 

 

 

 

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