The models and sizes of expansion joints (also known as compensators) can vary depending on the specific application needs. Because expansion joints are non-standard products, the following are some common expansion joint models and size ranges:

In terms of models, the specific models of expansion joints are usually related to their nominal diameter (DN), such as DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN400, DN500, DN600, DN800, DN1000, DN3000, DN6000, etc. These models represent the size of the inner diameter of the expansion joint.

In terms of size, the size of the expansion joint includes not only the inner diameter, but also its length, flange interface size, number of bolts and diameter, etc. For example, the length of the expansion joint can range from tens of millimeters to several meters, the flange interface size can be customized as needed, and the number of bolts and diameter can vary depending on the size of the expansion joint and the pressure it needs to withstand.

In addition, the model and size of the expansion joint is also related to the way it is connected. Common connections include flanged connections and take-off connections, which affect the external dimensions and installation requirements of the expansion joint.

It should be noted that the above are only some common expansion joint models and size ranges, and the specific models and sizes should be selected according to the actual application requirements. When purchasing expansion joints, it is recommended to comprehensively consider the specific use environment, media, temperature, pressure and other factors, and consult professionals for advice.