Hard seal butterfly valve, also known as flap valve, in the pipeline from the main cut and throttling effect, is a simple structure of the control valve, but also can be used for low-pressure pipe medium switch control. Mainly used in the furnace, gas, steam, natural gas, city gas, hot and cold air, chemical smelting engineering and power generation environmental protection system to transport a variety of corrosive, non-corrosive fluid medium pipe.
When installing a hard seal butterfly valve, the following points are worth noting:
First, the hard seal butterfly valve in the handling process are not allowed to touch, so as not to damage the sealing surface;
Second, the valve allows any position, angle and open installation;
Third, when not in use, should be placed in a cool dry place, the valve plate in the open 5 ° ~ 10 ° state, both ends of the block and to cover;
Fourth, the valve after installation, the user can set the maintenance cycle according to the opening and closing frequency, according to the provisions of the cycle, on time to the executive body filling grease;
Fifth, the valve in case of opening and closing disorders, should identify the reasons for the exclusion, shall not use knocking method forced open and close;
Sixth, the valve is installed in the pipeline to ensure that the valve seat and pipe coaxial, and in both ends of the flange and the valve body between the sandwich the appropriate gasket;
Seventh, the valve shall not be installed at the corner of the pipe or at the end of the pipe. When the valve is installed in the middle of the pipe, the pipe at both ends of the valve must be fixed and firmly secured;
Eighth, in the fastening flange bolts to symmetrical alternating fastening, must not be followed by separate fastening.