Motorized Fully Welded Ball Valve – API 6D Zero-Leakage Gas Pipeline Valve
The YONCO Motorized Fully Welded Ball Valve (Q961F Series) is the ultimate solution for urban gas, district heating, and petrochemical pipelines. Unlike traditional cast valves, the fully welded body design eliminates potential external leakage paths. Equipped with a high-performance electric actuator, it provides precise flow control and long-term, maintenance-free service in underground or above-ground installations.
Performance Features
- Fully Welded Body: One-piece forged steel body avoids any external leakage from flange connections.
- Advanced Sealing: RPTFE + 25% Carbon seats ensure a bubble-tight, zero-leakage shutoff.
- Stress Resistance: The valve material is consistent with pipeline grades, preventing stress deformation from ground movement or seismic activity.
- Maintenance-Free: Self-lubricating bearings and anti-static design for a service life exceeding 20 years.
- NACE Compliance: Available with NACE MR0175 certification for sour gas environments.
Technical Specifications
| Parameter | Standard / Value |
|---|---|
| Design Standard | API 6D, ASME B16.34, GB/T 12224 |
| Size Range | DN15 – DN1000 (1/2″ – 40″) |
| Pressure Rating | PN16, PN25, PN40 (Class 150 – 300) |
| Main Materials | ASTM A105, A182 F6a, Viton, RPTFE |
| End Connection | Butt Welded (BW), Flanged (RF/RTJ) |
| Actuator | High-Torque Electric Actuator (On/Off or Modulating) |
Application Fields
• Natural Gas Transmission
• Urban Gas Supply Networks
• District Heating Pipelines
• Petroleum & Petrochemical
• Thermal Power Plants
• Gas Regulation Stations
Global Pipeline Solutions
YONCO Valve Group specializes in critical flow control for large-scale energy projects. Our motorized fully welded ball valves undergo rigorous API 598 testing and ultra-high precision computer-aided inspection to guarantee safety and efficiency for your infrastructure.




