Butterfly valves can be used indoors and in the open air,the valve and other system components should be regularly checked for leakage, rust and lag phenomenon, and the maintenance.
Check valve is a kind of automatic valve, its main function is to prevent the back flow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium
The advantages of butterfly valve easy to open and close,simple structure, small volume, light weight; The disadvantages of butterfly valve is not easy to make small caliber and difficult to achieve full seal
