A lined ball valve is a type of valve designed with a ball-shaped disc to control the flow of fluids. The inner surface of the valve is lined with a material such as PTFE, which protects the valve from corrosive or abrasive fluids.

Lined ball valves offer excellent corrosion resistance, particularly for applications involving aggressive chemicals. They also provide smooth operation and tight shutoff, making them suitable for critical processes.

Lined ball valves are commonly used in industries such as chemical processing, pharmaceuticals, oil and gas, water treatment, and food processing where corrosive or abrasive fluids are handled.

The most common lining material for ball valves is PTFE (Polytetrafluoroethylene), but other materials such as PFA (Perfluoroalkoxy) and FEP (Fluorinated Ethylene Propylene) may also be used depending on the application.

Lined ball valves offer superior sealing properties and are less prone to corrosion compared to other types of valves. Their ball-shaped disc provides a more streamlined flow path, reducing pressure drop and minimising turbulence.

Factors to consider include the type of fluid being handled, operating temperature and pressure, flow rate, compatibility of lining material with the fluid, and any specific industry standards or regulations.

Yes, lined ball valves can be used for high-temperature applications, but the selection of lining material is critical. PTFE-lined valves are typically suitable for temperatures up to 400°F (204°C), while other materials like PFA or FEP may offer higher temperature resistance.

Yes, lined ball valves can be specially designed for cryogenic applications, with considerations for low-temperature sealing materials and construction that can withstand extreme cold.

Regular inspection and maintenance are crucial for optimal performance. This includes checking for leaks, corrosion, and wear, as well as ensuring proper operation of the valve mechanism. Depending on the application, periodic cleaning may also be necessary.

Yes, lined ball valves can be automated using actuators such as pneumatic, electric, or hydraulic actuators. Automation allows for remote operation and integration into control systems for improved process efficiency.

Full-port lined ball valves have a larger ball opening, providing minimal restriction to flow, while reduced-port valves have a smaller ball opening, which may cause slightly higher pressure drop but can be more cost-effective for certain applications.

While lined ball valves offer good resistance to corrosion, they may not be suitable for highly abrasive media. In such cases, additional measures such as using hardened materials or installing upstream filtration may be necessary.