Chemical pump sealing pads selection of the medium selected by chemical pumps have risky existence such as corrosion, volatilization, and explosion. The sealing performance requirements of the pump body are much higher than other types of pumps. The sealing method commonly used in chemical pumps has a sealing method. The pads are the basic elements of the static seal of the centrifugal pump, and the scope of use is very wide. The selection of the pads is mainly determined by factors such as the chemical pump conveying medium, temperature, pressure, and corrosiveness.

When the chemical pump conveying medium, when the temperature and pressure are not high, non -metal sealing pads are generally selected;

When the chemical pump conveying medium is high temperature, non -metal and metal combinations are selected.

Non -metallic pads are most commonly used on pumps. The materials are generally paper, rubber and polytrafluoroethylene. When the temperature does not exceed 120 ° C and the pressure is below 1.0MPa, green shell paper or molded paper pads are generally used. When the chemical pump conveyor medium is oil and the temperature is -30 to 110 ° C, the Dingqing rubber with better aging resistance is generally used. When a chemical pump conveyor medium, it is more appropriate to use fluorine rubber when -50 ~ 200 ° C. Because in addition to oil -resistant heat and heat, large mechanical strength is also its main feature. Due to the corrosiveness of the transmitted medium in the chemical pump, polytrafluoroethylene is generally used as a pad material. As the fields of chemical pumps are becoming more and more extensive, there are more and more types of transmitted mediums. Therefore, when choosing the material of the padding, the relevant information should be checked or the correct choice is made after the experiment.