Overview of Mechanical Seals for Pumps

Since most water pumps transport fluid media and have the characteristics of horizontal installation, high speed, high pressure, solid particles, and strong corrosiveness, the main material of the mechanical seal used in the pump often needs to resist the erosion and impact of solid particles and the sealing caused by high speed. Affected by unfavorable factors such as high-temperature abrasion, instability of sealing parameters caused by high pressure, and corrosion of base structural parts, mechanical seals have higher requirements for sealing materials. Usually, the optional materials for the sealing surface friction pair include nickel-based carbide, cobalt Base carbide, pressureless sintered silicon carbide, reaction sintered silicon carbide, metal-impregnated graphite, PTFE filled graphite, PTFE filled glass fiber, aluminum oxide special ceramics, etc.; the base material can be 2Cr13 Stainless iron, 301 stainless steel, 304 stainless steel, 316 stainless steel, 316L stainless steel, 904L stainless steel, PTFE, etc.; the optional materials for spring compensation parts are Hastelloy, 1Cr18Ni9Ti, 3Cr13, etc.;

Different from the mechanical seals used for kettles, the sealing media of mechanical seals used for pumps are mostly liquids, solid-liquid mixtures, and atmospheric pressure gases. The mechanical seals used for kettles are mostly used to seal high-pressure gases or gas-liquid mixtures. Leakage will cause serious damage to the environment and organisms. threaten.

Pump mechanical seal 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 model selection, machine accuracy, correct installation and use, etc. There are many types of mechanical seals for pumps. There are different models, and their maintenance is also difficult to identify and judge.