1. What are the materials for valve?
When choosing industrial valves, the material is a decisive factor that affects the corrosion resistance, the wear resistance, the working temperature, and the working pressure of the valve. To choose the appropriate material for the valve, it’s necessary to know what are common materials for construction.
Common Materials for construction
Cast Iron: Cast iron is a type of iron-carbon alloy with more than 2% of carbon content. It’s characterized by low melting temperature.
Ductile Iron: Ductile iron is also called ductile cast iron, spheroidal graphite cast iron or SG iron. It’s made of nodule-shaped graphite and has much more impact and fatigue resistance.
Carbon Steel: Carbon steel is a type of steel that contains 0.05 to 2.1 percent of carbon by weigh. It’s also commonly used to refer to the steel which is not stainless steel.
Stainless Steel: Compared with other kinds of steel,the stainless steel is characterized by the content of chromium, whose quantity is at least 11%. This component prevents the iron from rusting and also provides heat-resistant properties.
Knowing the basic features of the material, we many know what material is more appropriate for the industrial valves.
2. What are the materials for valve seals?
Apart from the valve body, the valve seal or gasket is also an important part of the industrial valve. Basically, they’re made of the following materials:
PTFE: An extremely low friction material that can function well over a wide range of pressures and temperatures.
Polyurethane: This durable material is suited for temperatures up to 200 F, pressures up to 6,000 psi, and offers excellent abrasion resistance.
3. Different materials for different applications
As a professional valve manufacturer, we offer a great variety of valves with a wide range of materials. And this variety of materials gives the valves different properties in different conditions and applications.
Cast Iron: Cast iron is the most economical option, which is a good choice for people on a budget. Besides, it has impressive temperature tolerance and including can work normally under temperatures over 1150C. The major drawback is that it’s not ductile at all and might crack by bending.
We offer various butterfly valves of cast iron. For more information, please click:
Ductile Iron: Unlike cast iron, ductile iron has better ductility and will not break when it is bent. In terms of its temperature limit, it’s a little lower than cast iron and is 730C. In summary, the ductile iron has excellent corrosion resistance, tensile strength, and yield strength. The only drawback of the material is that it’s more expensive than cast iron.
We offer different types of gate valves made of ductile iron. For more information, please click:
Besides, we also provide other types of valves, such as cast steel globe valve, whose materials involve a steel casting process, which delivers more strength or shock resistance than the cast iron does.
For more information, please click:
4. How to choose materials for valves?
When you select an industrial valve, whether it’s gate valve, butterfly valve or globe valve,etc, it’s important to choose the appropriate material that meets the requirements of different applications. These requirements can be summarized in following parameters:
Purpose of applications
As a valve manufacturer with experience of more than 15 years, we offer different types of industrial valves.
For more information, please click: https://www.watersvalve.com/products/