Ductile Iron Valves vs. Cast Iron Valves

Valves - Choosing between Ductile Iron and Cast Iron

Popular DIN 3352 F4 Ductile Iron Resilient Seat Gate Valve Made in China

 

Ductile Iron Valves vs. Cast Iron Valves

Now that we have looked at these two options separately, we will compare and contrast ductile iron and cast iron valves. Hopefully this will help you decide which is best for you! We'll compare the price, durability and ease of installation of these materials so you know the most important details.

 

Price

● Cast Iron: Compared to ductile iron valves, cast iron valves will save you a lot of money due to their simpler manufacturing process. If you don't need the additional benefits that ductile iron offers, cast iron is the smart move.

● Ductile Iron: Ductile iron is the more expensive option, but for good reason. In many cases, it offers significantly better properties than cast iron.

 

Durability

● Cast Iron: Cast iron is a strong material that can withstand higher pressures than any plastic. However, when the pressure rating of a cast iron valve or pipe is exceeded, it may bend and crack. Cast iron has almost zero ductility, which means it is rigid and will break if bent. Cast iron will also rust over time, so regular maintenance is necessary to keep the valve free from corrosion.

● Ductile Iron: Ductile iron also has impressive structural integrity. It can handle high pressures and temperatures without retreating. Due to its ductility, this material is also less likely to crack when bent. Ductile iron will also rust over time, but not as easily as cast iron.

 

Easy to install

● Cast Iron: This material offers the user many options when it comes to installation. Cast iron valves are typically bolted using flanges. Welding is difficult, but not impossible. Our cast iron valves are available with flanged ends, as this is an excellent method for high or low pressure applications.

● Ductile Iron: Ductile iron offers the user many of the same installation options due to its similarity in construction to cast iron. Welding is not recommended, but bolted connections using flanges are still the best option for most applications.

 

There you have it! Now you know it's not a matter of "tough vs. cast iron valves" or anything like that. One isn't always better than the other. It all depends on what you are using it for!

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