Double-flanges type butterfly valve is very common, it has two different kinds , now i want to share a little knowledge about
butterfly valve as following:
Figure A is U type double -flange butterfly valve .
Figure B is double-flange butterfly valve .
Both of them have double flanges , but their connection type is different. The two pictures show the difference evidently .
The face-to-face of Type A is shorter , and the weight is lighter, it is made with a big diameter usually.
Type A can be used to transport mud , because of it’s short face-to-face , the mud is remained less through the valve.
So if you make a order about butterfly valve , please notice it .