Corrosion-proof plastic manual valves

In demanding industrial environments, corrosion is a challenge that can lead to damaged equipment, reduced operational efficiency and unplanned downtime. To create safe and efficient processes, the use of corrosion-proof valves is essential. In this article, we explore the benefits of plastic valves and why they are a good alternative to traditional steel or stainless steel valves.

Corrosion-proof manual valves are made from materials that are resistant to rust and corrosion. Common material choices for valves in corrosive flows are steel, stainless steel, hastelloy and titanium - classic materials that generally offer good resistance to corrosion.

Plastic is more resilient

An alternative to the classic metals is plastic or fluoroplastic materials, which in many cases are a much better choice as they are extremely resistant to chemical substances. Valves made from these materials are ideal for use in harsh industrial applications where corrosive substances are present. Plastic valves can withstand both acidic and alkaline conditions and retain their functionality for a long time without being affected by corrosion.

Flexibility in design and application

The most common plastic materials for valves are PP, PVDF, U-PVC or C-PVC.

Plastic valves have a high degree of flexibility in their design as plastics can be moulded and adapted to different design and application requirements. This allows valves to be created to suit the specific needs and requirements of different industrial environments.

The most common plastic materials for valves are PP, PVDF, U-PVC or C-PVC. The choice of plastic grade depends on the type, concentration, temperature and operating pressure of the fluid. Depending on the choice of material, plastic valves can handle fluid temperatures up to 120°C and pressures up to 10 bar.

Manual valves are usually operated by handwheels, hand levers or plastic handwheels. For larger valve sizes, a plastic-coated gear is used, which gives the entire valve including the operating equipment very good corrosion protection. Actuators and other accessories are also available in plastic material to create extra good resistance to external corrosion.

Low weight and easy installation

Compared to metal valves, plastic valves are significantly lighter. Their light weight makes them easier to handle and install, saving time and reducing the risk of workplace injuries. This also makes them more flexible to use in different types of installations, including pipelines and pumping systems.

Economically favourable

Compared to steel or stainless steel valves, plastic valves usually have lower purchase costs. Plastic valves also require less maintenance, and because they are more resistant to corrosion, they do not need to be replaced as often. This results in lower life-cycle costs and, in the long run, greater cost savings. Over time, the use of plastic valves can contribute to significant cost savings for industrial plants.

Plastic valves an attractive option

Corrosion-proof plastic manual valves can improve a company's ability to manage corrosion and ensure long-lasting and reliable operation.

Corrosion-proof manual valves made of plastic materials offer several advantages in harsh industrial environments and power plants. Their corrosion resistance, light weight, economic benefits and flexibility in design and application make them an attractive alternative to traditional valves made of steel or stainless steel. By choosing corrosion-proof plastic manual valves, companies can improve their ability to manage corrosion, thereby ensuring long-term and reliable operation.

At Lyma, we have been handling corrosive liquids for over 40 years. We have extensive experience in material selection and can help you combine the right materials for your liquid.

Want to know more about valves?
Read our article "Corrosion-proof automated valves”.