2″ Union Ball Valve, Corrosion Resistant PVC Union Ball Valve for Water Treatment
2 inch union ball valve adopts union connection for easy disassembly and maintenance, anti-corrosion PVC/CPVC material, ideal for chemical wastewater & circulating water pipelines.
Description
The 2‑inch union ball valve (DN50) is commonly deployed in plastic piping systems for water treatment, chemical electroplating, swimming pool circulation, and acid/alkali chemical dosing lines. Its body incorporates an integrated double‑union connection design—after the pipes are solvent‑cemented, the valve can be removed for maintenance or seal replacement by simply loosening the union nuts, eliminating the need to cut the pipeline. This significantly reduces system downtime for repairs, making it a preferred ball‑valve choice for plastic plumbing applications.
Body materials are typically UPVC, CPVC, or PVDF, all offering good corrosion resistance. Seats are available in PTFE, EPDM, or FKM, capable of withstanding weak acids, weak alkalis, saline wastewater, chlorinated water, and similar aggressive media. The full‑port internal flow path provides low resistance and discourages sludge deposition or crystallisation, making it suitable for wastewater recirculation. The handle enables quick 90‑degree switching with light operating torque, and an optional locking handle prevents accidental actuation.
Basic Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal size | 2″ DN50 |
| Connection type | Socket‑end for solvent cement; flanged union optional |
| Body materials | UPVC / CPVC / PVDF |
| Sealing materials | EPDM, PTFE, FKM |
| Pressure rating | PN10, PN16 |
| Temperature range | UPVC: 0~60°C; CPVC: 0~95°C; PVDF: –20~120°C |
| Standards | ASTM, ISO 16132 |
| Optional features | Blowout‑proof stem; can be fitted with electric/pneumatic actuators |
Key Advantages
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Union disassembly design – Maintenance requires only removing the valve body, preserving the existing pipeline, which lowers repair costs and minimises production interruptions.
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Superior corrosion resistance – The plastic body never rusts, making it ideal for chemical wastewater, seawater desalination, and pool water treatment.
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Automation‑ready – An ISO 5211 standard top mounting pad allows later retrofitting of actuators for remote control.
Application Example
The BioTech Water Plant (Industriestraße 39, 47803 Krefeld, Germany), a regional water treatment facility, has extensively adopted the 2 inch union ball valve in its acidic/alkaline wastewater recirculation network. The union construction enables periodic seal replacements without dismantling entire pipe runs, substantially improving the efficiency of system operation and maintenance. The corrosion‑proof plastic body has demonstrated zero leakage or degradation even under continuous exposure to chlorinated wastewater, ensuring reliable, uninterrupted plant performance.
Quality Assurance & Customisation
All valves undergo hydrostatic and pneumatic leak tests before shipment, meeting procurement standards for water treatment projects in Europe and the Americas. Customised options include food‑grade materials and high‑corrosion PVDF versions for more aggressive service environments.
