ISO 15848-1 Compliance. Features: Two-Piece Trunnion Ball Valves. Flanged ends, weld ends, flanged-X weld ends. MSS Manufacturers Standardization Society. Below, you'll find further information on our trunnion ball valve materials, applications, and more. Lower operational costs. Therefore a trunnion ball valve can block both the upstream and downstream sides of the working area and then vent (bleed) any pressure that remains in the piping and valve. For a trunnion ball valve with a bleed function, the pressure in the ball pushes the seat back as the spring behind the seat compresses, and there is vent/bleeding between the sealing surfaces. In the floating ball valves the ball has some freedom of movement. Trunnion mounted ball valves are fitted with spring loaded seats. Double block and bleed and emergency sealant injection fittings are standard, along with NACE and fire-safe. View our online selection of ball valves! When the valve is positioned where the bore is aligned in the same direction as the pipeline, it is in the open position, and fluid can pass downstream. It usually consists of two trunnion ball valves that act as block valves and a bleed valve (usually ball or needle valve) to a safe location, consistent with local environmental regulations.
To learn more about making the right selection of ball valve for your application, read our ball valve selection technical article! For example, we offer Inconel 625 weld overlays that provide superior protection in challenging conditions. However, several critical projects need to vent at a pressure less than 1. Our products include ANSI Classes 150 – 2500 in carbon steel bodies with electroless nickel plating or stainless steel trim, as well as full stainless steel body and trim. Extended valve life at a fraction of the cost of a solid corrosion-resistant alloy valve. American Petroleum Institute (API) 6D design. Figure 1: Free floating ball valve (left) and a trunnion mounted ball valve (right). Our commitment to quality is second-to-none and exceeds industry standards so that our customers receive only the best products like trunnion mounted ball valves available. Gear Operated Trunnion Ball Valve. Below Ground Extension. Literature and data available on request. A ball valve uses a rotating ball and a stem to provide on/off flow control. The advanced, integrated design offers numerous advantages over traditional single-isolation block valves. This is advantageous since it will maintain a proper seal on both sides and there is no added torque to the stem.
Double block and bleed (DBB) is the process of shutting a pipe section on both sides of the valve rather than just one. A trunnion mounted ball valve provides lower operational costs due to the fact that any additional pressure on the valve is absorbed by the trunnion and the stem. Materials: 316 stainless steel or Inconel nickel-chromium alloys. BS British Standard. Standard lengths: 48-, 60-, 72-, 84- and 96-inch (custom high-head lengths available upon request). 1 times the originally designed pressure. For a DBB trunnion mounted ball valve, when the valve is in the closed position, and the fluid comes from upstream, it pushes the seat against the ball to release the sealing. They're designed to provide superior performance in a variety of applications, including offshore platforms, oil, gas, and other liquids pipelines, tank farms, meter stations, chemical processing plants and refineries.
All TVC TMBV address all of the safety, quality, and design issues important for ensuring consistent field performance and environmental protection. Tight shutoff is essential during oil and gas applications, and the superior anchoring of Forum's PBV® trunnion-mounted ball valves make them especially well-suited for large, high-pressure valve applications. 5 Steel Pipe Flanges and Flanged Fittings. 6D Specification for Pipeline Valves. Each detail is designed to minimize maintenance even under extreme operating conditions, significantly reducing operational cost over the total valve life. ISO International Organization for Standardization. 4 Liquid Petroleum Transportation Piping Systems.
When the pipeline is under pressure, the trunnion ball valve is closed. Forum's full catalog of PBV valve solutions offer a variety of stainless steel and high-nickel alloy weld overlays for internal surfaces. API American Petroleum Institute. Cost-effective options for ball valves in highly corrosive or erosive service. One seat seals the fluid from upstream, and the other seat seals the fluid from downstream. During use, the ball floats slightly downstream against the seat ring and creates a sealing only on one side of the valve. A trunnion ball valve is designed by API608 or API 6D and complies with several other industry standards.
Available in seat pocket, seal areas and all wetted parts. NACE/fire-safe design. Double Block and Bleed. Tiger Valve Company (TVC) is a trunnion-mounted ball valve manufacturer for the TL and TB Series. High direct mount with gear. We manufacture all of our three-piece and two-piece trunnion ball valves to the highest engineering and quality standards.
Forum's valve manufacturing also leverages a wide variety of certified materials that resist sulfide stress cracking and increase performance in corrosive environments. Welding in accordance with ASME standard BPV Section 9. API Standards: 6D & 6A. With any questions you have about this product or our trunnion-mounted Ball valve manufacturer service. Our entire valve catalog offers easy field service and numerous options such as stem extensions, locking devices, transition pieces and direct-mounted actuation. Size Range: 2" – 64". Features:Three-Piece Trunnion (Metal-Seated) Ball Valve.
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