A 1-piece (1-pc) ball valve is a quarter-turn shutoff valve featuring a unibody design, where the main housing is cast o...
Inquire1. Brief Introduction of Products:
A 3-piece (3pc) ball valve is a highly serviceable flow-control valve featuring a three-part body—a central section holding the internal components, sandwiched between two end caps. The end pieces permanently connect to the pipe, allowing the central body to be easily unbolted and removed for quick cleaning, maintenance, or part replacement.
Key Benefits
• Easy Maintenance: You can quickly replace worn-out seats, seals, or the ball itself without disconnecting the entire valve from the pipeline.
• No Pipeline Disruption: Because the end caps remain attached to the pipe, maintenance causes minimal downtime and eliminates the need to shut down the whole system.
• Versatile Connections: Unlike simpler 2-piece valves that are usually threaded, a 3pc valve can easily be socket-weld or butt-weld connected to pipelines.
2. Technical Specification:

3A Standards
| Size | K1 | L1 | H | L2 |
| 1/2" | 25.2 | 90 | 67 | 130 |
| 3/4" | 25.2 | 102 | 70 | 130 |
| 1" | 50.5 | 114 | 76 | 163 |
| 1 1/2" | 50.5 | 140 | 91 | 189 |
| 2" | 64 | 157.5 | 98 | 189 |
| 2 1/2" | 77.5 | 198 | 140 | 300 |
| 3" | 91 | 220 | 161 | 250 |
| 4" | 119 | 243.5 | 180 | 330 |
This product are also available in DIN, ISO/IDF, SMS, BSP standards. Please feel free to contact us if you need it in other standards!
3. Key Applications and Use Cases:
Due to their cleanable and modular design, 3pc ball valves are widely used in operations requiring frequent sterilization, sanitation, or heavy-cycle maintenance:
•Food and beverage processing
•Pharmaceutical manufacturing
•Chemical and oil/gas pipelines
•Heavy-duty industrial and process systems
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