Q21F Three-Piece Ball Valve with External Thread and Welding Pipe Overview    

The Q21F Three-Piece Ball Valve with External Thread and Welding Pipe is a compact ball valve featuring a three-piece split-body design that combines both external thread and welded pipe connection functions. The valve body is typically made of brass or stainless steel, with one end designed as a standard external thread (e.g., G-thread) and the other as a welding pipe interface. The middle valve body is connected to both ends via bolts to form the three-piece structure. The valve operates by rotating the stem to drive the ball for 90-degree opening and closing, and the seat employs soft sealing materials such as PTFE (Polytetrafluoroethylene). This design enables flexible adaptation between threaded and welded connections, making it suitable for pipeline systems with space constraints or requiring hybrid connection methods. It is commonly used in instrumentation, small-scale equipment, pneumatic systems, and retrofit projects.

Q21F Three-Piece Ball Valve with External Thread and Welding Pipe Product Image

Q21F Three-Piece Ball Valve with External Thread and Welding Pipe Features

1. Flexible Hybrid Connection Design: The unique structure combines an external thread on one end and a welded pipe connection on the other, simultaneously meeting requirements for detachable threaded connections and permanent welded connections. This adaptability suits complex installation scenarios.

2. Convenient Maintenance with Three-Piece Structure: The valve body features a three-piece bolted design, allowing internal cleaning, inspection, or seal replacement of the central section without completely disassembling the pipeline, simplifying maintenance.

3. Compact Design Saves Space: With an overall compact structure, it is particularly suitable for space-constrained or complex pipeline layouts, effectively reducing the number of pipe adapters.

4. Reliable Sealing and Easy Operation: The PTFE seat ensures soft sealing performance with a low friction coefficient, resulting in minimal opening and closing torque and smooth, effortless operation.

5. Cost-Effective and Versatile: Constructed from corrosion-resistant brass or stainless steel, the valve is suitable for common media such as water, oil, and air. The hybrid connection design reduces the need for additional installation accessories, lowering overall costs.