The butterfly valve flange must have been known to many people. Its composition is based on these simple parts, and as long as it is slowly rotated vertically, it can be quickly opened and closed, with good fluid control characteristics. Today small is necessary for what is a standard butterfly valve flange, flange and butterfly valves which have content characteristics, explain in detail, if you are interested in this topic will continue to understand down. 
What is the standard of butterfly valve flange?
1, the butterfly valve flange in terms of volume will be relatively small, so it will be more lightweight on the weight, it is an industrial component, and the installation of the disc is in the pipe diameter direction. When we use it, the disc-shaped butterfly valve rotates around the central axis. The angle of rotation is within 90°. Once it is rotated to 90°, the valve will be open. Now common butterfly valve flanges are elastically sealed, and metal seals are the two sealing methods. The elastic sealed flange valves can be mounted on the valve body, or around the butterfly plate. 
2, butterfly valve flange in the design of the manufacturing standards, generally are GB/T12238-89 "general valve flange and butterfly valve connection", and JB/T8527-1997 "metal seal butterfly valve" JIS two international standards of. The butterfly valve flange size in accordance with PN = 1.0MPa according to JB/T82.1-94 "convex facing welding steel pipe flange" requirements, the structure of the butterfly valve flange length according to GB12221-89 "flange connection metal valve structure Length to specify. The inspection and test of the butterfly valve flange is based on the provisions of GB/T 13927-92 "General Valve Pressure Test".
What are the characteristics of butterfly valve flange?
1. The composite valve seat of the butterfly valve flange is made of a very strong elastic material. Of course, it is not only a lot of good elasticity, but also the use of PTFE has a low coefficient of friction and is not easy to wear. , not easy to aging and other characteristics, so that the butterfly valve life can be improved. The flange butterfly valve has the same sealing principle and structural features as the common midline butterfly valve. The flange butterfly valve sealing structure adopts PTFE, synthetic rubber and phenolic resin to form a composite valve seat, so that the valve seat has better strength at the same time of elasticity. 
2. The main advantage of the butterfly valve flange is that it will be lighter in size, and it is also relatively simple in terms of disassembly and maintenance. It can also be installed in any position. The structure is simple and compact, and the operating torque is small. The 90° rotation is quick to open. Its adjustment performance will be better, and the connection between the butterfly plate and the valve stem uses a pinless structure to overcome possible internal leakage points.
3, the butterfly board is the use of a spherical shape, this can effectively improve the sealing function, and it can also extend its life, when the pressure is more than 50,000 times to maintain open and close to maintain zero leakage. The seals can be replaced, and the seals can be reliably sealed in both directions. The disc can be sprayed with a coating according to the user's requirements, such as nylon or polytetrafluoroethylene. The valve can be designed as a flange connection and a counter-clip connection. The drive mode can be manual and electric. Or pneumatic. 
More about what is standard butterfly valve flange, flange and butterfly relevant content which features on the introduction here, I hope these help you. If you still don't understand where you can pay attention to more news, if you want to learn more about this news, please continue to pay attention to our website.
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