Dealing with Sediment in Mechanical Lubricating Oil: A Comprehensive Guide

As sellers of grease and lubricants, we understand the importance of maintaining the purity and effectiveness of your lubricants. Sediment in mechanical lubricating oil is a common issue that can lead to various problems, impacting the performance and lifespan of your machinery. This blog post will delve into the causes of sediment formation and provide practical solutions to address them, ensuring optimal lubrication and preventing potential damage.

Understanding Mechanical Impurities

Mechanical impurities refer to the total amount of substances in petroleum or petroleum products that are insoluble in oil and specified solvents. These include materials like mud, sand, dust, iron filings, fibers, and certain insoluble salts. These impurities can be removed through methods such as sedimentation or filtration.

In light oils, mechanical impurities can clog oil passages, promote the formation of gums, or cause corrosion. In boiler fuels, they can block nozzles, reducing combustion efficiency and increasing fuel consumption. For lubricating oils, these impurities can disrupt the oil film, increasing wear, blocking oil filters, and accelerating the formation of carbon deposits.

These impurities originate from external contamination during the production, storage, and use of oil products, or from the wear and tear of the machinery itself. The majority consists of sand, gravel, carbon deposits, and some organic metal salts from additives that are not easily soluble in solvents.

Understanding Sediment

Total sediment refers to all inorganic and organic substances in oil products that are insoluble in solvents like toluene. It is a specification index for medium and heavy fuel oils. Sediment often consists of mechanical impurities introduced during processing, transportation, or storage. A high sediment content can easily block filters, nozzles, and valves, and can cause or worsen the wear of mechanical parts.

Key Causes of Sediment and Impurities in Lubricating Oil

The presence of sediment and impurities in lubricating oil is primarily caused by the following three factors:

(1) Pre-existing impurities in the equipment system before new oil is added: New equipment and equipment that have been in use for a long time often generate some impurities. In such cases, the equipment is generally flushed with flushing oil until the impurities contained in the oil reach the specified limits.
(2) Failure to follow prescribed operating requirements for the storage, transportation, and use of lubricating oil: This can lead to the entry of impurities during these processes, affecting the quality of the oil.
(3) Sediment is mainly produced by high-viscosity-grade engine oils with larger additive doses. These may exhibit varying degrees of precipitation at low temperatures. This sediment is not caused by impurities generated after long-term use of the equipment or by external impurities contaminating the oil, and therefore does not affect the normal use of the oil.

Treatment Methods for Sediment and Impurities

Addressing the three causes of sediment and impurities requires different treatment methods:

Addressing Existing Impurities in the Equipment System Before Adding New Oil: Different equipment has different lubricating oil systems, some larger and some smaller. Regardless of size, an oil system typically consists of an oil tank, oil pump, oil cooler, oil filter, valves, pipelines, and instrumentation. These components are connected to the various lubrication points of the machine itself, such as bearing bushes, bearing housings, crankcase oil holes, and oil grooves, forming a relatively complex lubricating oil system.

New Equipment: When installing lubricating oil pipeline systems, it is crucial to keep the inside of the pipes clean. It is also necessary to perform oil circulation flushing of the unit's lubricating oil system. If the oil system is not clean and there is dirt inside the pipes, it will affect the normal operation of the unit and may even burn out the bearing bushes. Therefore, oil circulation flushing provides a guarantee for the long-term stable operation of the unit.

Long-Term Used Equipment: Equipment that has been in use for a long time often generates some impurities. In such cases, the equipment is generally flushed with flushing oil until the impurities contained in the oil reach the specified limits. The flushing oil after flushing should be discarded or repurposed. If you want to reuse this flushing oil, you must conduct corresponding oil analysis and testing, and it can only be used after the cleanliness reaches a certain standard. It is also required to strengthen filtration and water/impurity removal before and during use.

By understanding the causes of sediment and impurities in mechanical lubricating oil and implementing the appropriate treatment methods, you can maintain the performance and extend the lifespan of your machinery. Remember to prioritize cleanliness during oil handling and system maintenance. At XiaoYiChong, we are committed to providing high-quality grease and lubricants that meet your specific needs. Contact us today to learn more about our products and how we can help you optimize your lubrication practices.

Dealing with Sediment in Mechanical Lubricating Oil: A Comprehensive Guide

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