API 6D ASME Cast Steel Flange Top Entry Trunnion Mounted Ball Valve

Product Features

• Modular maintenance design: The top entry structure allows direct disassembly of components from the top of the valve body, enabling on-line maintenance or replacement of parts without overall disassembly of the valve, which greatly reduces downtime.
• Comprehensive safety protection: Equipped with anti-static devices to avoid dangerous situations caused by static accumulation; adopts fireproof design to meet industrial safety specifications; self-draining valve seat can automatically release excessive pressure in the cavity, improving system safety.
• Excellent sealing performance: The double block and bleed (DBB) function can block the upstream and downstream media at the same time and discharge the media in the middle cavity, ensuring maintenance safety; the valve seat and ball are precisely matched, with O-ring sealing to achieve zero leakage.
• Strong structural adaptability: The trunnion mounted design makes the ball stress more stable, suitable for high-pressure and large-diameter working conditions; equipped with lifting lugs and valve brackets for easy installation and fixation; the connecting end can be customized according to pipeline requirements to improve adaptability.

Manufacturing Process

• Material processing: The valve body adopts forging process (such as Hastelloy and other special materials), and its chemical composition and mechanical properties meet ASME standards. Forging eliminates internal defects of materials and improves structural strength.
• Precision machining: The ball and valve seat are processed by high-precision lathes and grinders, and the surface roughness is controlled in a very low range to ensure fit; the design of the sealing surface strictly calculates the specific pressure and allowable specific pressure to ensure sealing reliability.
• Assembly process: Adopts split assembly, and the ball and valve seat are installed from the side for precise positioning; the elastic elements (such as springs) at the rear of the valve seat undergo preload testing to ensure stable sealing force during long-term use.
• Testing standards: Each valve undergoes pressure testing, sealing testing, action testing, etc. Key components such as valve stems and trunnions are subject to non-destructive testing to ensure compliance with international standards such as API 6D/6A.