The bonnet is the cover of the opening in the valve body and is the second most important valve component in the pressure valve. Like the valve body, the bonnet is designed in different shapes and sizes.
The valve cover is of the same casting material as the valve body and serves as the cover on the valve body. It is usually attached to the body by threaded, bolted or welded joints. During the manufacture of the valve, the internal components such as the stem, valve plate, etc. are put into the valve body, and then the valve cover is installed to hold all the components inside.
In all cases, the connection of the valve cover to the body is considered a pressure boundary. This means that the welded joints or bolts connecting the bonnet to the body are the pressure-bearing parts. Bonnets, while a necessity for most valves, are also a concern. Bonnets complicate valve manufacturing, increase valve size, account for a significant portion of valve cost, and are a source of potential leaks.
Bonnet stainless steel investment casting
Stainless steel casting is an investment casting process that offers many benefits when used to produce precision components such as valve covers. A stainless steel investment casting process can help save costs while bonnets are available through OEM service. Here are some of the benefits you can get when using the stainless steel casting method to make valve covers.
Durability
One of the biggest advantages of stainless steel bonnets over other types of metal bonnets is that they are very durable and strong. Cast stainless steel bonnets can be used in any type of temperature without any problems when used in extreme hot or cold temperatures. When a company chooses to buy high-quality cast stainless steel valve covers, they can count on them to hold up well for a long time. Given the durability and longevity of stainless steel bonnets, they are a very good investment and affordable in the long run.
No corrosion
Cast stainless steel bonnets are not prone to rust or corrosion. This makes the use of cast stainless steel bonnets the preferred choice for industrial applications where conditions can cause the metal to rust or corrode quickly. While cast iron bonnets are also less prone to rust or corrosion, they do not have the strength, durability or high pressure resistance of cast stainless steel bonnets.
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