Key Differences Between PFA Lined Valves and Sleeved Plug Valves

Key Differences Between PFA Lined Valves and Sleeved Plug Valves

In industrial settings handling chemicals and corrosive liquids, conventional valves may not be up to the task. This is where PFA lined valves and sleeved plug valves step into the equation. Both provide corrosion resistance and dependable shutoff capabilities, each with benefits tailored to specific requirements. This article will explore the disparities between PFA lined valves, Sleeved plug valves, and aid in selecting the most suitable option for your operation.

PFA lined valves: shielding against corrosion

PFA lined valves, also referred to as plug valves, feature a sturdy construction that offers exceptional defence against corrosive substances. These valves are coated entirely with perfluoroalkoxy (PFA), a high-performance fluoropolymer renowned for its chemical resistance. The inert properties of PFA render it impervious to a range of chemicals, such as acids, alkalis, and strong solvents.

Let's delve deeper into the characteristics of PFA lined valves.

·       Superb Corrosion Resistance: The PFA lining provides safeguarding against various corrosive liquids, making them well suited for applications in chemical processing, pulp and paper manufacturing, and challenging industrial environments.

·       Reduced Friction and Wear: The PFA surface smoothness helps minimise friction between the plug and body, reducing wear and tear and ensuring operation for an extended period of time.

·       Cavity-Free Structure: Valves with PFA lining boast a cavity design that eliminates stagnation points, preventing the accumulation of contaminants or fostering bacterial growth. This feature makes them well suited for applications in industries like food and beverage or pharmaceuticals.

·       Easy Quarter Turn Operation: Similar to plug valves, PFA lined valves offer a simple quarter-turn operation for convenient on/off control.

However, there are some drawbacks to consider with PFA lined valves:

·       Sensitivity to Temperature: PFA has a higher temperature tolerance compared to metal valve materials. While they can handle temperatures in scenarios exceeding recommended limits, this may result in deformation or liner failure.

·       Limited Throttling Capability: These valves are mainly designed for on/off service and may not be suitable for throttling applications.

·       Higher Cost: Due to the PFA lining and sturdy construction, PFA lined valves generally come at a higher price point compared to sleeved plug valves.

Sleeved Plug Valves: An Affordable Choice for Specific Applications

Sleeved plug valves provide a budget option compared to PFA lined valves for various uses. These valves feature a PTFE (polytetrafluoroethylene) sleeve that lines the flow path inside the body. PTFE is a type of fluoropolymer, offers chemical resistance and low friction properties.

Here are some notable features of sleeved plug valves:

·       Affordable: Sleeved plug valves are generally more affordable than PFA lined valves due to their design and use of a replaceable sleeve.

·       Chemical Resistance: The PTFE sleeve offers protection against corrosive chemicals, making it suitable for diverse industrial applications.

·       Easy Maintenance: The replaceable PTFE sleeve allows for cost-effective maintenance in case of damage or wear.

·       Wider Temperature Range: In comparison to PFA lined valves, sleeved plug valves can often accommodate a temperature range depending on the body material used.

However, there are also some downsides to consider with sleeved plug valves:

·       Prone to Wear and Tear: The PTFE sleeve is more vulnerable to wear and tear compared to the PFA lining found in PFA lined valves. This may result in leakage problems over time in high-cycle applications.

·       Gaps: When it comes to sleeved plug valves, there's a chance of gaps forming between the sleeve and the body, which might trap contaminants or lead to leaks if the sleeve wears out. While sleeved plug valves have improved, there could still be cavities where fluids can get stuck.

Deciding between PFA lined valves and sleeved plug valves depends on your needs. Here's a simple guide to help you make the choice:

·       If you need chemical resistance and a cavity-free design, go for PFA lined valves. They work best for handling fluids or maintaining strict hygiene standards.

·       For cost-effective solutions, in applications with corrosive media, sleeved plug valves are worth considering. Just keep in mind maintenance costs for replacing sleeves.

IDEX Richter

IDEX Richter is your go-to partner for valves. As a top manufacturer of performance valves, like PFA lined and sleeved plug valves, they provide a wide range of valve options tailored to meet diverse industry requirements.

Their valves are well known for their top-notch quality, reliability, and durability. When you collaborate with IDEX Richter, you get access to:

·       A wide range of PFA lined valves and sleeved plug valves in sizes, materials, and pressure ratings to meet application needs.

·       A dedication to quality as their valves are carefully designed and crafted using premium materials that adhere to strict industry standards.

·       A team of experienced engineers to help you choose the right valve for your specific requirements and offer ongoing technical assistance.

·       A presence worldwide, timely delivery and reliable post-sales support to keep your operations running smoothly.

Conclusion 

Choosing the right valve for your needs is crucial for optimal performance, safety, and cost effectiveness. Understanding the distinctions between PFA lined valves and sleeved plug valves empowers you to make a choice. For applications requiring corrosion resistance, a cavity-free design and longer-lasting PFA lined valves are options. If cost is a consideration and the application involves corrosive substances, sleeved plug valves can be a suitable alternative. No matter what you need, rely on IDEX Richter as your go-to partner for quality valves. Get in touch with them to chat about your needs and check out our range of PFA lined valves and sleeved plug valves.