The result is added protection for vulnerable areas and improved performance even within the most hostile environments. Pinion shaft extension with gear and miter box, upright orientation. 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. Size Range: 2" – 64". Body material: carbon steel (dual-rated A105/LF2). With any questions you have about this product or our trunnion-mounted Ball valve manufacturer service. Below, you'll find further information on our trunnion ball valve materials, applications, and more. Trunnion mounted ball valve design. API Standards: 6D & 6A. Size range: 2-24 inches. 6D Specification for Pipeline Valves. High direct mount with gear.
The API 6D standard also gives the standard weights of trunnion ball valves corresponding to different bore sizes and body dimensions. Trunnion ball valves have many different advantages over free floating valves, they are suitable for low, and high-pressure applications, and offer lower operational costs then free floating ball valves. The fluid remains trapped within the ball, which creates a resultant pressure in the ball. Trunnion-Mounted Ball Valves. In a floating ball valve, the ball is only connected to the stem, and is therefore called floating.
8 Gas Transmission and Distribution Piping Systems. ASME American Society of Mechanical Engineers. Cost-effective options for ball valves in highly corrosive or erosive service. Gear Operated Trunnion Ball Valve. API American Petroleum Institute. Pressure class: ANSI 150-2500. In a floating ball valve the pressure forces the ball against the seats, which creates a seal. Spring-Loaded Seats. Contact us for more information. Trunnion mounted ball valve weight rating. Below Ground Extension. Series T Carbon Steel. Weld Overlay Internals. Materials: 316 stainless steel or Inconel nickel-chromium alloys.
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. National Association of Corrosion Engineers (NACE)/fire-safe design. Trunnion Ball Valve - How They Work. We offer a full range of materials in carbon, alloy and stainless steel from general to severe in application, including Sub Sea. High-head direct mount with two-inch square operating nut. The most common type of ball valve has a "free floating" design, so the trunnion type is a design change. NACE/fire-safe design. The carbon steel balls with electroless nickel plating (ENP) were completely degraded from the heavy brine environment, while the Inconel overlay valves showed zero signs of pitting or corrosion.
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. Onshore or offshore, Forum's PBV® tandem ball valves withstand the most hostile hydrocarbon operating environments and provide positive shutoff for enhanced safety. Trunnion Ball Valve - How They Work. Our tandem valves are designed to the highest manufacturing standard including American Petroleum Institute (API) and American National Standards Institute (ANSI). The valve has two seats, each providing a seal against pressure separately. 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. Literature and data available on request. One seat seals the fluid from upstream, and the other seat seals the fluid from downstream. Special applications: metal-seated, alloy overlays, high/low temperatures, cryogenic services. Welding in accordance with ASME standard BPV Section 9.
Size range: two to 12 inches. After cleaning and refitting with new seals, the valves were returned to service for significant equipment savings. Tandem (Double Ball) Valves. This design provides a positive seal on both downstream and upstream seats, regardless of pressure, allowing for Double Block and Bleed, or Double Isolation and Bleed function. 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 low or no-pressure situations the spring-loaded seats will create a seal, while also working for high pressure applications.
keepcovidfree.net, 2024