Mechanical Seals for Pumps

Since water pumps are mostly used to transport fluid media, they have the characteristics of horizontal installation, high speed, high pressure, solid particles, and strong corrosiveness. Therefore, the main material of the mechanical seal for the pump often needs to resist the impact of solid particles, high temperature abrasion of the sealing surface caused by high speed, unstable sealing parameters caused by high pressure, corrosion of the base structure and other unfavorable factors. The requirements for the sealing material of the mechanical seal are relatively high. Usually, the optional materials for the friction pair of the sealing surface are nickel-based cemented carbide, cobalt-based cemented carbide, pressureless sintered silicon carbide, reaction sintered silicon carbide, metal-impregnated graphite, polytetrafluoroethylene-filled graphite, polytetrafluoroethylene Filled with glass fiber, special ceramics of aluminum oxide, etc.; the base material can be selected from 2Cr13 stainless iron, 301 stainless steel, 304 stainless steel, 316 stainless steel, 316L stainless steel, 904L stainless steel, polytetrafluoroethylene, etc.; the spring compensation parts can be selected from Hastelloy, 1Cr18Ni9Ti, 3Cr13, etc.;

Different from the mechanical seals for kettles, the sealing media of mechanical seals for pumps are mostly liquids, solid-liquid mixtures and atmospheric pressure gases, etc.; while the mechanical seals for kettles are mostly used to seal high-pressure gases or gas-liquid mixtures, and leakage will pose a serious threat to the environment and organisms.

The mechanical seal for pumps is one of the basic mechanical components with precision and complex structure, and is a key component of pump machinery. Its sealing performance and service life depend on many factors, such as selection, machine accuracy, correct installation and use, etc. There are many types of mechanical seals for pumps. The models are different, and their maintenance is also difficult to distinguish and judge.