① Stainless steel flexible hose has excellent follow: As the bellows seal itself closed structure, the structure eliminates the common seal in the spring of the movement must ring and sleeve (or shaft) of the moving ring, the bellows The bomb itself was used to form the full rate of pressure (and the existence of common seals because seals in the ring sleeve relative displacement occurs when the need to consume some counterweight. ring and sleeve (or shaft) between the friction to position, balance the size of the ring by the dimensional accuracy and heat treatment processing limitations, indicating excellent follow of using the process, often because of ordinary mechanical seal device fluctuations or operating process, and many other causes of pump taking the time phenomenon, then the presence of ring face seal is opened can not be reset, causing the mechanical seal leakage, and bellows mechanical seal in the structure eliminates seal failure this way almost from the impact of taking the time to pump , showing its good compensation and, in the light hydrocarbons easy to find time to pump, vacuum pumps and other pumps in the bottom outstanding performance, this feature is to apply universal bellows seal is an important reason.
　　② Stainless steel flexible hose high temperature bellows seal removed as ordinary spring seal ring seals in the effects for the medium and temperature significantly expanded, usually ordinary mechanical seal ring seals of PTFE material to use more rubber and other organic compounds, some of these organic compounds in the medium, in conjunction with medium body produces a chemical reaction, at low temperature and high temperature conditions, will change its physical properties, resulting in hardening of the seal failure, and the bellows seal of the above factors can not restrictions, usually applied to benzene, ketones, olefins, paraffins and general oil, acid, alkali salts, and many other media, but also by the temperature range -250 degrees -450 degrees, of course, this also requires strict selection of metal bellows and welded hot repair.
　　③ Stainless steel flexible hose balanced bellows mechanical seal seal compared with the ordinary, do not step on the processing of the sleeve itself can establish a balance in diameter, in equilibrium (usually part of the balance) when the bellows inside diameter size parameters can be adjusted to achieve the ideal state, bellows mechanical seal in the application are generally balanced.