2″ True Union Ball Valve, Detachable Maintenance Design PVC Ball Valve
2″ inch true union ball valve features split true union connection for easy disassembly & repair, corrosion resistant, widely used in chemical, water treatment pipeline control.
Description
The 2‑inch union ball valve (DN50) is a widely used plastic valve in chemical and water treatment applications. Its core design incorporates a True Union split‑body configuration, consisting of union nuts, union ends, and the valve body. This allows the valve body to be removed independently for servicing or seal replacement without cutting the pipeline—eliminating the common problem of having to discard the entire pipe section when a traditional glued‑type valve fails.
The body is typically manufactured from UPVC, CPVC, or PVDF, offering excellent resistance to acids and alkalis. Paired with PTFE corrosion‑resistant seats, the valve handles aggressive media such as chemical solutions, electroplating wastewater, seawater, and circulating water. The full‑port flow passage ensures low fluid resistance, while the 90° quick‑action lever provides light operating torque for fast shutoff.
Basic Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal size | 2″ DN50 True Union ball valve |
| End connections | Socket ends for solvent cement welding; flanged options available |
| Body materials | UPVC / CPVC / PVDF |
| Seat seals | PTFE / EPDM / FKM |
| Pressure ratings | PN10, PN16 |
| Temperature range | UPVC: 0~60°C; CPVC: 0~95°C; PVDF: –20~120°C |
| Standards | ASTM D2467, ISO 16132 |
Two Key Advantages of the True Union Design
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Maintenance without pipeline disassembly – Simply loosen the union nuts on both ends to detach the valve body, allowing quick access to replace seals or the ball. This significantly shortens downtime on chemical production lines.
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High installation tolerance – The union structure permits fine adjustment of axial alignment, reducing stress‑cracking risks from misalignment during adhesive bonding, thereby lowering the failure rate in plastic piping installations.
The stem is equipped with a blowout‑proof and anti‑burst feature, and a lockable handle is available to prevent inadvertent operation. An ISO 5211 mounting pad is provided on top, enabling retrofit with pneumatic or electric actuators for automated control.
Application Example
These valves are extensively deployed in chemical processing plants and overseas biotech laboratory water systems. One notable installation is at the BioTech Water Plant (Industriestraße 39, 47803 Krefeld, Germany), a regional European facility, which selected the 2″ true union ball valve for its entire wastewater recycling loop.
In the presence of acidic and alkaline effluent, the union‑type disassembly enables routine seal maintenance without cutting or dismantling the piping—cutting annual operational costs by 32%. The corrosion‑resistant plastic body has demonstrated zero leakage or degradation even when exposed to chlorinated wastewater over prolonged periods, ensuring uninterrupted treatment performance.
