A UPVC Union Thread Ball Valve is a type of ball valve made from Unplasticized Polyvinyl Chloride (UPVC), a rigid and durable plastic material. This valve is designed to control the flow of fluids through pipes by using a spherical ball with a hole in the middle. The ball rotates within the valve body to either allow or block the flow of fluid. The term “union” refers to the type of connection used, which allows for easy disassembly and replacement. “Threaded” refers to the type of connection at both ends of the valve, where it screws into threaded pipe fittings.
Key Features
- Material (UPVC):
- UPVC is a rigid form of PVC that doesn’t contain plasticizers, which makes it more durable, chemically resistant, and suitable for use in environments that require a non-corrosive material.
- Union Connection:
- The valve has union-style connections, meaning it can be easily connected and disconnected from the pipeline without the need for specialized tools. The union connection is typically a threaded part that can be tightened or loosened by hand or with a wrench.
- Threaded Ends:
- The valve features male or female threads at both ends for easy installation into a threaded pipe system. Common thread types are NPT (National Pipe Thread) or BSP (British Standard Pipe) threads.
- Ball Mechanism:
- Inside the valve, there is a ball with a hole (or bore) through the center. When the valve is turned, the ball rotates. When the hole aligns with the pipe, fluid flows through. When the valve is closed, the ball rotates to block the flow.
Advantages:
- Corrosion-resistant: UPVC is resistant to rust, scaling, and corrosion, making it suitable for water and other fluid systems.
- Easy Maintenance: The union design allows the valve to be easily removed, inspected, or replaced if necessary.
- Lightweight: UPVC valves are lighter than metal valves, making them easier to handle and install.
- Cost-effective: UPVC is generally less expensive than metal alternatives, making it a budget-friendly option.
- Chemical Resistance: UPVC is resistant to a wide range of chemicals, acids, and alkalis.
Applications:
- Water systems (drinking water, irrigation, etc.)
- Chemical and industrial applications where corrosion resistance is critical
- Aquarium and pool systems
- Wastewater treatment plants
Limitations:
- Temperature sensitivity: UPVC is not suitable for high-temperature applications (typically rated up to 140°F/60°C).
- UV degradation: UPVC is prone to UV degradation if exposed to sunlight for extended periods, so UV inhibitors or protective coatings may be needed for outdoor use.
In summary, a UPVC Union Thread Ball Valve is a durable, reliable, and cost-effective valve choice for controlling fluid flow in various piping systems, particularly in environments that require resistance to corrosion and chemicals. The union-threaded design offers ease of installation and maintenance.
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BS 3505、BS 4346（801），ASTM D1785 SCH40（802）、ASTM D1785 SCH80（803）、DIN（804），GB（805）,GB（806）,
GB(901)，DWV(902)，ASTM D2665（903）
