Forged Steel Flanged Ball Valve – YONCO Trunnion Mounted Series
The YONCO Forged Steel Flanged Ball Valve (Q347F Series) is a premium trunnion-mounted valve engineered for high-pressure pipelines. Ranging from Class 150 to Class 1500 (PN16 to PN160), this valve is designed to efficiently cut off or connect fluid in the pipeline. By selecting different forged materials, it delivers exceptional performance across a wide variety of media, including water, steam, oil, LNG, natural gas, nitric acid, acetic acid, and oxidizing agents.
Key Features & Advantages
- Minimal Flow Resistance: Featuring a full-port design, the internal channel aligns perfectly with the pipeline diameter, allowing media to flow through with virtually zero friction or pressure loss.
- Quick & Easy Operation: A simple 90-degree rotation is all it takes to fully open or close the valve. Compared to gate or globe valves of the same specification, it is lighter, more compact, and easier to install.
- Trunnion Mounted Stability: The fixed ball design (trunnion) ensures that high pipeline pressure does not push the ball against the downstream seat, significantly reducing operating torque and increasing seal life.
- Forged Body Integrity: Eliminates the risk of porosity and shrinkage common in cast valves, offering ultimate safety in high-pressure and high-stress environments.
Performance Parameters
| Parameter | Specification |
|---|---|
| Working Pressure | 1.6 MPa ~ 25.0 MPa (Up to Class 1500 / PN160) |
| Working Temperature | ≤ 180°C (Depending on seat material) |
| Applicable Media | Water, Steam, Oil, Gas, Weakly Corrosive Media |
| Body & Bonnet Material | Forged Carbon Steel (A105), Forged Stainless Steel (F304, F316) |
| Ball & Stem Material | Cr/Ni/Mo Stainless Steel |
| Seat Sealing Ring | Flexible Graphite / SS316 + Flexible Graphite |
| Packing Material | PTFE (Polytetrafluoroethylene) |
Main Application Industries
• Oil & Gas Pipelines
• Petrochemical Plants
• LNG Processing Facilities
• Power Generation
• Chemical & Fertilizer (Urea)
• Offshore Platforms
Reliable Forged Valves by YONCO
As a professional industrial valve manufacturer, YONCO guarantees strict dimensional control, zero-leakage testing, and compliance with international standards (API, ASME, JIS, DIN). Contact us today with your specific pipeline requirements, and our engineering team will provide the perfect forged steel ball valve solution.




