Trunnion Ball Valves
Trunnion Ball Valves
Global Valve and Controls trunnion design ball valves incorporate the use of upper and lower supports (GVC trunnion plate system) to retain the ball under pressure. Global Valve and Controls API 6D trunnion ball valves have a secondary sealant injection system for stem seals and seats in the event of providing a temporary seal to an otherwise damaged area. The Global Valve and Controls trunnion ball valve design using the upper and lower trunnion plate system essentially doubles the safety and reliability of a standard trunnion ball valve.
The Global Valve and Controls trunnion plate system feature is standard on all Global Valve and Controls API 6D trunnion ball valves from 4” and up (ANSI 600 through 2500). It permits the valve to be installed in either direction, since the trunnion prevents the ball from shifting -- or worse, blowing out – under high pressure applications.
Another important benefit of the Global Valve and Controls trunnion plate system design is that it allows the ball to only rotate a quarter turn with no hysteresis thus more control and reliability under extreme applications.
Global Valve and Controls standard API 6D trunnion ball valves use materials in accordance with NACE MR0175/ISO15156. In order to ensure compliance customers must provide application specific operating conditions.
The trunnion ball valve is used for cutting or connecting the medium in various pipelines of class150-class2500 and pn16-pn320. It can be suitable for various media such as water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, acetic acid, oxidizing media, urea and etc. It is widely used in such industries as chemical industry, petroleum, natural gas, metallurgy and etc. The driving modes of the trunnion ball valve include worm and worm gear driving, manual driving, pneumatic driving and electric driving. The trunnion ball valves generally adopt flange connection, and butt-welding connection is also adopted. The seat can be soft seal seat or metal hard seal seat.
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