One of the most common materials for valves is industrial plastics. These plastics are uniquely designed to meet the ever-expanding needs of various industries, with new materials constantly being introduced to reach different markets. Plastic materials used in the piping industry offer specific advantages based on their properties. Here’s how plastic is commonly used as a valve material:
Corrosion Resistance
Plastic valves, particularly those made from materials like PVC (Polyvinyl Chloride), CPVC (Chlorinated Polyvinyl Chloride), and PVDF (Polyvinylidene Fluoride), are highly resistant to corrosion. This makes them suitable for applications where exposure to corrosive chemicals or substances is a concern.
Chemical Resistance
Plastic valves exhibit excellent chemical resistance, making them ideal for handling various acids, bases, and other corrosive chemicals. This property is particularly valuable in chemical processing, water treatment, and wastewater management industries.
Lightweight
Plastic valves are generally lightweight compared to their metal counterparts. This makes them easier to handle during installation and maintenance. The reduced weight can also be advantageous when minimizing the load on piping systems is a consideration.
Ease of Installation
Plastic valves are relatively easy to install due to their lightweight nature and the ease with which plastic materials can be joined. Methods such as solvent cementing or threading are commonly used for plastic valves, simplifying the installation process.
Low Friction
Plastic valves typically have lower coefficients of friction compared to metal valves. This can result in smoother operation and reduced wear on moving parts, contributing to the efficiency and longevity of the valves.
Resistance to Biological Growth
Plastic valves are less prone to biological growth, such as algae or mold, than metal materials. This can benefit applications where maintaining cleanliness and preventing microbial contamination is important.
Customization
Plastic valves can be easily molded into various shapes and configurations, allowing customization to meet specific design requirements. This flexibility in design is helpful in applications where unique valve shapes or features are needed.
While plastic valves offer several advantages, it’s important to note that they may not be suitable for all applications, especially those involving high temperatures, extreme pressure, or mechanical stress. The selection of plastic valves should be based on a careful consideration of the specific requirements of the intended application.