Product description：

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Product overview

At Metals Valve, we offer an extensive range of Cast Steel Trunnion Ball Valves that cater to different needs. These valves are made from various cast materials, including carbon steel, alloy steel, and stainless steel. The unique design of a trunnion mounted ball valve ensures that the ball is fixed or constrained at two pivot points, namely the upper stem and bottom stem.
By incorporating a bearing at the bottom stem (trunnion), the valve allows for pivoting movement within the body cavity. This design restricts the ball's motion to only pivoting, enhancing its stability and performance. Additionally, the upstream seat of the valve is a floating seat, which means that the process pressure pushes it against the ball's sealing surface.
To further enhance the seal, the seat can be pre-stressed during assembly using seats that possess a spring action. This clever design feature exerts continuous pressure against the trunnion-mounted ball once it is installed, ensuring a secure closure. The top-works of the valve apply a load to the entire closure member, reinforcing its strength and durability.
Cast Steel Trunnion Ball Valves are commonly equipped with soft seats, which enable them to achieve a bubble-tight seal. With these valves, you can rely on exceptional sealing performance, making them suitable for a wide range of applications.

Design features and material selection

The Cast Steel Trunnion Ball Valve follows a set of design standards to ensure optimal performance. These standards include API 6D, API 608, BS 5351, ISO 14313, and ASME B16.34. The valve is also fire safe, meeting standards such as API 607, BS 5146, and ISO 10497.
In terms of connections, the valve is designed with ASME B16.5, ASME B16.25, and ASME B16.11 end connections. Face to face measurements are based on ASME B16.10 standards.
The Cast Steel Trunnion Ball Valve is available in two variations: full port (FB) or reduced port (RB). This 2 piece split body valve can be operated manually with a lever/gear system or by actuator.
The valve undergoes rigorous inspection and testing prior to release, following standards such as API 598, API 6D, and EN 12266-1. With these design standards and testing procedures in place, customers can trust in the quality and reliability of the Cast Steel Trunnion Ball Valve.

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