The compensator's compensating capability stems from the elastic deformation of the bellows, which includes stretching, compressing, bending, and their combinations. The size of the compensator's compensating ability is determined by the designer based on the requirements, and is reflected in the product as the specified rated compensating amount, indicating the high compensating capability under certain conditions. Different types of compensators have different compensating forms, mainly including axial, lateral, angular, and their combinations.