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High-Pressure Metal Seated DBB Trunnion Mounted Electric Actuated Ball Valve - Leading China Suppliers & Factory
Key Features
Trunnion Mounted Ball Design
Upper and lower bearings support the ball, minimizing operating torque and ensuring stable performance under high pressure and large diameter conditions.
Heavy-Duty Split Body Construction
Multi-bolt split body with reinforced flanges offers high structural strength, excellent pressure resistance, and convenient maintenance for severe service.
Metal Seated Sealing Structure
Metal-to-metal sealing provides reliable shut-off performance in high temperature, high pressure, abrasive, and particle-containing media.
Electric Actuation & Safety Design
Top-mounted electric actuator enables remote on/off control and seamless integration with automated control systems. Anti-static and fire-safe features enhance safety and sealing reliability in hazardous environments.
What is a trunnion mounted ball valve and how does it differ from a floating ball valve?
A trunnion mounted ball valve has the ball mechanically anchored by upper and lower trunnion bearings, which absorbs line pressure and significantly reduces operating torque. In contrast, a floating ball valve relies on line pressure to push the ball against the downstream seat. Trunnion designs are preferred for high-pressure, large-diameter, and heavy-duty applications where lower torque and longer service life are critical.
What are the advantages of a heavy-duty split body construction in ball valves?
The split body design allows the valve body to be assembled from two or more bolted sections, making internal components — such as the ball, seats, and stem — accessible for inspection, repair, or replacement without removing the valve from the pipeline. Reinforced flanges and multi-bolt connections provide exceptional structural integrity and high pressure resistance, making them ideal for severe service environments.
When should a metal seated ball valve be used instead of a soft seated valve?
Metal seated ball valves are recommended for demanding process conditions where soft elastomeric seats would fail or degrade. These include applications involving high temperatures (above 200°C), abrasive or erosive media, slurry, scale, or particle-laden fluids. The metal-to-metal sealing interface delivers long-lasting, reliable shut-off performance in environments that would quickly wear out or melt conventional soft seats.
How does the electric actuator integrate with automated control systems?
The top-mounted electric actuator connects to DCS (Distributed Control Systems), SCADA, or PLC platforms via standard control signals such as 4–20mA, 24VDC, or digital fieldbus protocols. This enables fully automated remote open/close operation, real-time valve position feedback, and programmable control sequences — eliminating the need for manual on-site operation and improving overall process efficiency and safety.
What do anti-static and fire-safe features mean for ball valve safety?
Anti-static design incorporates grounding springs or conductive paths that dissipate static electricity build-up between the ball, stem, and body — preventing spark ignition in flammable or explosive atmospheres. Fire-safe design ensures that even if soft sealing elements are destroyed by fire, the valve maintains a minimum level of sealing integrity to prevent catastrophic leakage. Together, these features are essential for valves used in oil, gas, petrochemical, and other hazardous industries.
What industries and applications are these electric trunnion ball valves typically used in?
Electric trunnion mounted ball valves with metal seating are widely used across oil and gas pipelines, LNG terminals, refinery and petrochemical plants, power generation facilities, mining and mineral processing, and high-temperature steam systems. Their combination of high-pressure tolerance, durable sealing, and remote electric control makes them the preferred choice for critical on/off isolation service in large-diameter and high-pressure pipeline systems.