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Fire-Safe Multi-Layer Stem Sealing Trunnion Mounted Ball Valve Class 2500 - Reliable China Suppliers & Factory Solutions
Key Features
Three-Piece Split Body + Heavy Flange Connection
Thick flanges and multi-bolt design ensure high strength, easy assembly, and convenient maintenance in severe service.
Anti-Blowout Stem & Multi-Layer Packing
Multi-stage stem with anti-blowout design, multi-layer packing, and thrust bearings ensure safe, leak-free performance under high pressure.
Fire-Safe & Anti-Static Design
Visible fire-safe coating and anti-static construction maintain sealing and safety in hazardous environments.
Trunnion Mounted Design
Upper and lower bearings support the ball, preventing displacement and ensuring stable operation at Class 2500.
Metal-Seated Hard Seal
Metal-to-metal sealing delivers reliable shut-off in high temperature, high pressure, abrasive, and frequent cycling service.
Gearbox Operation (Optional Electric/Pneumatic)
Industrial gearbox provides smooth torque control for large sizes, with optional electric or pneumatic actuation.
Frequently Asked Questions
The three-piece split body design allows for easy disassembly and maintenance without removing the valve from the pipeline. Combined with heavy flange connections and multi-bolt fastening, it provides superior structural integrity and is ideal for severe service conditions where frequent inspection is required.
The anti-blowout stem is engineered with a multi-stage retention structure that prevents the stem from being ejected under high pressure. Combined with multi-layer packing and thrust bearings, this design ensures a completely leak-free seal even in demanding high-pressure environments, significantly reducing safety risks.
A fire-safe design ensures that the valve maintains its sealing integrity during or after a fire event, using secondary metal seats to prevent leakage even if soft seals are damaged. Anti-static construction provides electrical continuity between the ball, stem, and body, safely dissipating static charges to prevent ignition in hazardous or explosive environments.
In a trunnion mounted design, the ball is mechanically anchored by upper and lower bearings, so pipeline pressure does not push the ball against the downstream seat. This dramatically reduces operating torque and seat wear at high pressures such as Class 2500, making it far more suitable for large-diameter, high-pressure applications compared to floating ball valves.
Metal-seated hard seal ball valves are recommended for applications involving high temperatures, high pressures, abrasive media, or frequent open/close cycling where soft PTFE seats would wear prematurely. Typical applications include steam systems, hot oil pipelines, slurry transport, and petrochemical processes that demand long service life and reliable tight shutoff.
Yes. The valve is designed with a standardized actuator mounting interface (ISO 5211 compliant) that allows seamless integration of electric or pneumatic actuators as an option. This makes it suitable for remote control, automated process systems, and applications where manual operation of large-diameter valves would require excessive torque.