In today’s world, plastic has become one of the most durable and cost-effective materials you can use. In fact, in the 21st Century, plastics are stronger, more flexible, and are used in parts and materials that were not possible a few years ago. For example, you may choose a PVC check valve over one made from stainless steel or brass. But is plastic always the better choice? Let’s take a closer look and see.
What Are Check Valves?
A check or one-way valve is designed to allow flow in only one direction. In other words, it prevents backflow within a system. A ball type one-way valve works with a small ball mechanism that is forced forward from the flow of air or liquid in a system. When the pressure stops, the ball falls back, covering the inlet port.
Plastic and Metal – What’s the Difference?
The design and structure of a PVC check valve and a brass check valve are basically the same. Both serve the same purpose. However, most plastic valves are made with an injection mold process while metal valves are machined.
Metal Benefits
Even though you can machine many plastics these days, metal valves are usually made to tighter tolerances for the fittings. You may get a stronger or more durable connection with metal valves. Metal is stronger than plastic and can take greater impact or abuse.
Plastic Benefits
If you want the lightest parts possible, a PVC check valve is the best choice. Plastic is usually the most cost-effective selection, and this is an important consideration if you need many parts. Because PVC material is lighter than metal, you’ll pay less for shipping on average. If your supplier is a custom manufacturer, you’ll enjoy the benefits of built to order parts, and they’ll help you choose the best plastic or metal valves for your needs.
