Since the two were using SSiC and M106D friction rubber bellows as well as elastic components, mechanical seals, then metal gland material should be Ha Ha formula B or type C, the mechanical seal picture, if not then the mechanical seal gland is intolerant acid corrosion of the first to know life index is calculated based on the comprehensive factors selected materials, processing methods and expected conditions of use and other values. due to material defects, processing and use of uncertainties, and should not Each life assurance mechanical seals reach consensus.