3-Piece Ball Valve
The 3-piece ball valve is a new-type ball valve with unique structural advantages, including friction-free switching, wear-resistant sealing performance and low operating torque. It realizes pipeline opening and closing by rotating the valve stem, achieving stable and flexible fluid control.
Structural Features
Low Fluid Resistance: The resistance coefficient is equivalent to that of the same-length pipeline section, ensuring smooth medium circulation.
Compact & Lightweight Structure: Simple overall structure, small size and light weight, saving installation space.
Reliable Sealing Performance: Adopts high-quality plastic sealing materials with excellent tightness, suitable for vacuum system applications.
Flexible Operation: Enables rapid opening and closing with simple operation and sensitive response.
Convenient Maintenance: The sealing ring is designed to be movable, facilitating quick disassembly, replacement and daily maintenance.
Anti-corrosion Protection: When fully opened or fully closed, the ball and seat sealing surface are isolated from the medium, effectively avoiding medium erosion and prolonging service life.
Product Specifications
| Item | Specifications |
|---|---|
| Product Name | 3-piece Ball Valve |
| Model | Q11F |
| Valve Body Material | Carbon Steel WCB; Stainless Steel CF8/304; Stainless Steel CF8M/316 |
| Connection Type | Internal Thread / External Thread / Socket Weld / Butt Weld / Union Butt Weld / Clamp / Extended Butt Weld |
| Nominal Size | 1/2"~4" |
| Operation Mode | Manual / Pneumatic / Electric |
| Applicable Media | Water, gas, oil, etc. |
| Operating Temperature | -10℃~130℃ |
| Nominal Pressure | PN16 |
| Design Standard | ANSI B16.34; API608 |
| Wall Thickness Standard | ANSI B16.34; EN12516-3 |
| Thread Standard | ANSI B1.20.1; BS21; DIN 2999/259; ISO 228-1; ISO7/1; JIS B0203 |
| Test Standard | API598; EN 12266 |
Structural Drawing
Structural Drawing of 3-piece Ball Valve
Conclusion
The 3-piece ball valve can achieve tight closure with only 90° rotation and low operating torque. The straight-through inner cavity provides a low-resistance flow channel for media. Originally designed for full opening and full closing on-off control, it is now optimized to realize throttling and flow regulation functions. Featuring compact structure, easy operation and convenient maintenance, it is widely applicable for conventional media such as water, solvent, acid and natural gas, as well as harsh working condition media including oxygen, hydrogen peroxide, methane and ethylene. The valve body can be designed as integral or combined type to meet diverse installation and application requirements.
Application Fields
The 3-piece ball valve is suitable for high-pressure and large-bore applications in industries such as petroleum, chemical engineering and natural gas. Featuring excellent sealing performance, it can withstand higher pressure and temperature.
Installation Instructions for 3-Piece Ball Valves
The components of a 3-piece ball valve can be disassembled for cleaning or maintenance while the valve body remains installed on the pipeline. It allows worn elastomer components (such as seals) to be replaced to adapt to changing system operating conditions or service life.
3-piece ball valves are available in multiple end connections, including FNPT (Female National Pipe Taper), socket weld and tube socket weld.
Mounting bolts can be directly threaded into the mounting flange
Reduce the risk of mounting nuts falling off or getting lost during valve installation and maintenance
Two-piece pipe adapter enables the flange to rotate independently of the pipe connector for easier alignment
Achieve fast and precise alignment of the valve central body
Self-compensating stem sealing design guarantees long-term leak-free operation
