👉 The plug fluid, also known as hydraulic sealant or plug oil, is a specialized lubricating and protective fluid used in hydraulic systems to maintain optimal performance and longevity. It serves multiple critical functions: it reduces friction between moving parts, prevents metal-to-metal contact that can lead to wear and damage, and acts as a barrier against contaminants such as dirt, water, and debris. Plug fluid is specifically formulated to withstand the high pressures and temperatures found in hydraulic systems, ensuring that seals and other components remain effective and reliable over time. When a seal or plug becomes clogged, the plug fluid is released to flush out contaminants, but it can also be replenished periodically to maintain its protective properties.
