API 6D carbon steel trunnion ball valve is a type of ball valve with a fixed ball. The ball is secured by upper and lower trunnions (support shafts) and does not shift due to fluid pressure. This design enables the trunnion ball valve to withstand higher pressures and reduces wear on the valve seats, making it suitable for high-pressure, large-diameter, and high-temperature applications. Trunnion ball valves are widely used in industries such as oil, natural gas, chemical, metallurgy, and power generation.
Structural Features of Carbon Steel Trunnion-Mounted Ball Valves
Ball Fixation: Unlike floating ball valves, the ball in a trunnion-mounted ball valve is secured by upper and lower bearings, allowing only rotational movement. This design ensures the ball remains stable under high pressure, reduces friction between the ball and valve seats, and extends the valve's service life. For example, in high-pressure natural gas pipelines, trunnion-mounted ball valves can withstand pressures of up to several tens of megapascals while maintaining smooth operation for normal opening and closing.
Seat Sealing: Typically employs an elastic sealing structure, such as sealing rings made of materials like polytetrafluoroethylene (PTFE) or polyphenylene (PPL). These seals offer excellent sealing performance and corrosion resistance, ensuring reliable sealing under various media and temperature conditions. For instance, in pipelines carrying corrosive chemicals, PTFE seals effectively prevent leakage, protecting both the environment and equipment.
Actuation Mechanism: Generally equipped with manual, electric, or pneumatic actuators to meet diverse operational requirements. Manual actuators are simple and reliable, suitable for non-automated applications, while electric and pneumatic actuators enable remote control and automation, enhancing efficiency and safety. For example, in large-scale chemical plants, imported carbon steel trunnion-mounted ball valves with electric actuators can be remotely controlled from a central control room for quick opening, closing, and regulation.
Order Specification
Product Item: Forged Trunnion Mounted Ball Valve, Full Bore
Type: Trunnion Mounted Ball Valve
Design Standard: API 6D
Size: 8 Inch, DN200
Pressure Rating: Class 150 LB
Body Material: ASTM A105N
Materials:
Ball/Disc: ASTM A182 F316
Seat: ASTM A182 F316
Seat Ring: RPTFE
Stem: ASTM A182 F316
Test Standard: API 598
Packaging: Wooden Case
Operation: Gear Operated
End Connection: RF
Contact us for API 6D Trunnion Ball Valve, Carbon Steel A105N, 8 IN, 150 LB：sale@gneetube.com