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Flange butterfly valve and groove butterfly valve are two types of butterfly valves that are commonly used in various industries. Both of these valves have their own unique features, which make them ideal for specific applications.

The main difference between flange butterfly valve and groove butterfly valve lies in their design. Flange butterfly valve has a flange on its body, which allows it to be mounted on a pipe or a tank using bolts. On the other hand, groove butterfly valve has a groove on its body, which allows it to be clamped onto a pipe or a tank using a clamp system.

In terms of installation, flange butterfly valve requires a more complex installation process as it needs to be bolted onto the pipe or tank. This process can be time-consuming and requires skilled labor. On the other hand, groove butterfly valve can be installed quickly and easily using a clamp system, which requires less skill and effort.

Another key difference between these two valves is their sealing mechanism. Flange butterfly valve uses a gasket to create a seal between the valve body and the pipe or tank. This gasket needs to be replaced periodically, which can be a maintenance challenge. On the other hand, groove butterfly valve uses an elastomeric seal, which is more durable and requires less maintenance.

In terms of price, flange butterfly valve can be more expensive than groove butterfly valve as it requires additional components such as bolts and gaskets. However, this price difference can vary depending on the specific application and the manufacturer.

Overall, both flange butterfly valve and groove butterfly valve have their own unique advantages and disadvantages. Choosing the right valve for your application depends on factors such as installation requirements, maintenance needs, and budget. By understanding the differences between these two valves, you can make an informed decision that meets the needs of your application.