The technical section of the official website of Shanghai Songjiang Vibration Absorber Co., Ltd. shares industry experience on various rubber joints, providing some uncommon yet correct answers. Below is a diagram to help you instantly understand the difference between butterfly valve special flange and common flange.
Shown in the image is the physical photograph of the butterfly valve special flange:
The clamp butterfly valve flange, also known as the butterfly flange or clamp special flange, is a flange specifically designed for the installation of clamp butterfly valves in pipelines, matched with clamp butterfly valves. The main difference between the clamp butterfly valve special flange and the common flange lies in the inner diameter of the flange. The inner diameter of the special flange is exactly matched with the nominal diameter of the required butterfly valve, with a groove at the back that allows the connected steel pipe to be inserted, ensuring the sealing effect of the clamp butterfly valve. If ordinary flange plates are used, the sealing effect of the butterfly valve cannot be guaranteed. Additionally, the outer diameter, thickness, center distance, and bolt holes of the clamp butterfly valve special flange are all the same, using double-ended bolts. As for the use of bolts, it varies according to different operating temperatures.
