Cast Trunnion Mounted Ball Valves For Reliable Flow Control
2-piece trunnion ball valve casting ensures precise flow control and shut-off in high-pressure piping systems, offering corrosion resistance and double block & bleed functionality.
Cast Trunnion Mounted Ball Valves For Reliable Flow Control
2-piece trunnion ball valve casting ensures precise flow control and shut-off in high-pressure piping systems, offering corrosion resistance and double block & bleed functionality.
2-Piece Trunnion Ball Valve Casting is a high-performance flow control device designed for demanding industrial piping systems, utilizing a cast body and trunnion-mounted ball for enhanced stability and sealing. Compliant with standards like API 6D, ASME B16.34, and GB12237, these trunnion mounted ball valves are crafted from materials such as stainless steel (AISI 316/304), carbon steel (A105), and duplex stainless steel, ensuring exceptional corrosion resistant ball valve properties. Widely used in oil and gas pipelines, petrochemical plants, power generation, and water treatment systems, they provide reliable boiler pipeline protection under pressures up to 2500 PSI and temperatures ranging from -29°C to 425°C.
Manufactured through precision casting, the 2-piece trunnion ball valve features a two-piece body design that simplifies maintenance and ensures robust construction. The trunnion-mounted ball, supported by fixed shafts, reduces operating torque and enhances sealing under high-pressure conditions, making it ideal for high-pressure ball valve applications. Available in sizes from 2" to 48" (DN50 to DN1200), these valves support flanged, butt-welded, or threaded connections, with fire-safe designs meeting API 607 standards. Surface treatments like passivation or electro-polishing enhance corrosion resistance, while PTFE or metal seats provide leak-free performance in harsh environments involving acids, seawater, or abrasive media.
Cast Ball Valves undergo rigorous testing, including hydrostatic, leakage, radiographic, and ultrasonic inspections, to comply with API 598 and GB/T13927 standards. With a minimum tensile strength of 515 MPa and yield strength of 205 MPa for AISI 316, these valves ensure durability in demanding conditions. The double block and bleed (DBB) feature allows isolation and pressure relief, enhancing safety in critical applications like oil and gas pipelines. Compared to floating ball valves, trunnion designs offer superior performance in high-pressure and large-diameter systems, with lower torque requirements for manual, pneumatic, or electric actuation.
Compared to forged valves, 2-piece trunnion ball valve casting offers cost-effective production while maintaining high strength and precision. Certified by API 6D for pipeline safety and NSF/ANSI 61 for potable water, these valves are versatile for diverse industries. Their design supports easy maintenance, with replaceable seats and seals extending service life. Specialized options, such as cryogenic trunnion valves, handle liquified gases like LNG at -196°C, while ceramic-lined versions resist wear in abrasive slurry applications. Anti-static devices and blowout-proof stems further enhance operational reliability.
Addressing challenges like pipeline corrosion, leaks, and high-pressure demands, 2-Piece Trunnion Ball Valve Casting delivers reliable, efficient solutions for industrial piping systems. Their robust cast construction, corrosion-resistant materials, and advanced sealing make them a preferred choice for engineers seeking durable pipeline flow control. Backed by Sunny Steel’s white-glove service, these valves ensure exceptional performance, safety, and longevity in oil and gas, petrochemical, and power generation applications.
Our ball valves are engineered for reliable performance across water, oil, and gas applications. Designed and manufactured according to international standards, they ensure durability, safety, and efficiency.
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
We offer valves in a wide range of materials to meet diverse industry requirements. Additional grades are available upon request.
| Material | Main Properties | Typical Applications |
|---|---|---|
| Carbon Steel | High strength, cost-effective | General industrial, water, oil & gas |
| Stainless Steel | Excellent corrosion resistance | Chemical, food, pharmaceutical |
| Alloy Steel | High temperature & pressure resistance | Power plants, refineries |
| Duplex Steel | High strength, seawater resistance | Marine, offshore, oil & gas |
| Nickel Alloys | Extreme corrosion & heat resistance | Chemical, aerospace, marine |
| Cast Iron | Low cost, limited strength | Low pressure water systems |
| Bronze & Brass | Seawater resistance | Marine, small valves |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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