Cast iron valves or ductile iron valves

 

Differences

Installation

◑ Cast iron: This material offers the user many options when it comes to installation. Cast iron valves are typically flange bolted. 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 many of the same installation options for the user because of its similar construction to cast iron. Welding is not recommended, but bolting with flanges is still the best option for most applications.

 

Cost

◑ Cast Iron: The manufacturing process for cast iron valves is simpler than for ductile iron valves, which can save you a lot of money. If you don't need the additional benefits that ductile iron offers, cast iron is the smart choice.

◑ 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 a cast iron valve or pipe exceeds its pressure rating, it will bend and break. Cast iron has almost zero ductility, which means it is rigid and will break if bent. Cast iron also rusts over time, so regular maintenance is necessary to prevent valve corrosion.

◑ Ductile iron: Ductile iron also has impressive structural integrity. It can withstand high pressures and temperatures without retreating. Due to its ductility, the

This material is also less likely to crack when bent. Over time, ductile iron will also rust, but not as easily as cast iron.