However, in the actual use process, the actual installation position and process requirements also need to be considered. Although the floating pneumatic ball valve and the fixed pneumatic ball valve are not directional during installation, in order to prevent excessive leakage between the valve body and the valve cover during actual installation, usually the valve body of the pneumatic ball valve is connected with the direction of the tank or material, which can better achieve the sealing effect.

5. When there is a fluid with precipitated liquid that is easy to attach and deposit substances on the pipe wall, if a conductive substance with higher conductivity than the liquid is attached, the signal potential will be short circuited and cannot work. If it is a non-conductive layer, first pay attention to the pollution of the electrode, such as selecting a pointed or hemispherical protruding electrode that is not easy to attach, a replaceable electrode, a scraper type scale cleaning electrode, etc. In places where adhesion is easy to occur, the flow rate can be increased to achieve the purpose of self cleaning, and more convenient and easy to clean pipeline connection can be adopted, without dismantling and cleaning the sensor. The contact electrode electromagnetic flowmeter is attached with a non-conductive film, and the instrument can still work, but it can also not work if it is a highly conductive layer.