RP International Ltd is top Vanillin Supplier and Manufacturer in China. Vanillin Flavourings,Fresh Pure Vanillin Flavour,Natural Ethyl Vanillin Flavour,Food Flavourings Vanillin RP International Ltd , http://www.rp-foodadditives.com
1 Diesel-powered petrol engine oil is divided into gasoline engine oil and diesel engine oil. Although the gasoline engine and the diesel engine work under high temperature, high pressure, and high load conditions, the two are still quite different.
First, the compression ratio of a diesel engine is more than twice as large as that of a gasoline engine. The pressure on the main parts is much greater than that of a gasoline engine. Therefore, the production materials of some parts are the same. For example, the gasoline engine main bearing bush and the connecting rod bearing bush can be made of babbitt metal with softer material and good corrosion resistance, while the diesel engine bushing must use high performance materials such as lead bronze or lead alloy, but these materials have poor corrosion resistance.
For this reason, some anti-corrosion agents should be added to the diesel engine oil so that a layer of protective film can be generated on the surface of the bearing pad to reduce the corrosion of the bearing pad and improve its wear resistance. Since gasoline engine oil does not have such anti-corrosion agent, if it is added to the diesel engine, the bearing pads will be prone to spotting, pitting, even falling into pieces, and the engine oil will soon deteriorate.
In addition, the sulfur content of diesel fuel is greater than that of gasoline. This harmful substance will form sulfuric acid or sulfurous acid during the combustion process. Together with the high-temperature and high-pressure exhaust gas, it will enter the oil sump to accelerate the oxidation and deterioration of the engine oil. Therefore, diesel engine oil Antioxidants need to be added to make the oil alkaline. If there is acid gas intrusion, it can play a role in the neutralization, will not cause the oil to oxidize too quickly. The gasoline engine oil is not added with this additive, so it is neutral. If it is used in a diesel engine, it will quickly deteriorate and deteriorate due to the corrosion of the acid gas. Therefore, diesel vehicles must use diesel engine oil instead of gasoline engine oil.
2. Imported motor oil for domestic cars Some people now think that imported motor oil must be better than domestic engine oil. Therefore, the use of imported engine oil on domestic vehicles, especially new ones, often causes many ills. For example, most imported oils have low viscosity and cannot meet the requirements of domestic vehicles for oil viscosity. In addition, the thermal expansion systems and associated clearances for various engine parts of domestic engines are larger than those of imported cars, and most domestic cars do not have engine oil radiators. If imported oil is used, the oil pressure will be too low due to over-dilution of the engine oil, or even the specified working pressure will not be achieved. This will not meet the need for normal lubrication and will increase the wear of the engine.
3 blindly select the level of lubricating oil Lubricating oil quality is directly related to the length of life of the engine, especially the new vehicle is very strict on the lubricating oil requirements, what lubricating oil, when to replace, how to replace, etc. should be in accordance with The manufacturer's regulations are followed.
When selecting the engine oil, it is necessary to pay attention to the quality level, but also pay attention to the viscosity level. First, the performance level should be selected according to the compression ratio, displacement, etc.; then the viscosity level should be selected according to the temperature and load. Good quality oil can ensure good engine lubrication, reduce wear, extend engine life, and extend the oil change intervals. When choosing the oil viscosity, in addition to the air temperature conditions, the engine oil lubrication and sealing should be used to try to use low-viscosity engine oil in order to save fuel.
4 Mixed use of engine lubricating oils. The base oils are the same except for different viscosity grades. The only difference is the type and quantity of the added components. Therefore, the types and quality grades of lubricants are generally classified according to the types and amounts of the added components. Lubricants with different types of additives cannot be mixed, otherwise they may cause chemical reactions in the additives of the oil and impair the proper performance of the lubricant. With the continuous improvement of additives and their formulations, some common oils such as QE/CC, QF/CD, etc. have been developed and produced, which can be used within the scope of the indicated grades. Therefore, whether or not the lubricating oil can be used in combination should be based on the requirements of the specification and comprehensively check the name, type and grade of the oil. Therefore, the use of a reasonable level of use and appropriate brands, can not be mixed.
5 The higher the viscosity of the lubricant, the better. To reduce the wear of moving parts, the lubricant must have sufficient viscosity to form an oil film between moving parts at various operating temperatures. However, the viscosity of the lubricating oil must not be higher than that which affects the start of the engine, and it requires that the friction generated under continuous operating conditions be minimal. The use of lubricating oils with excessive viscosity increases the wear of the parts due to:
(1) The viscosity of the lubricating oil is too large, the flow is slow, and although the oil pressure is high, the flow rate of the lubricating oil is small, and the lubricating oil cannot be replenished to the friction surface in time.
(2) When the viscosity of the lubricating oil is large, the frictional resistance between the friction surfaces of the moving parts increases, which affects the dynamic performance of the engine and the fuel economy.
(3) If the viscosity of the lubricant is large, the circulation speed will be slow, and the cooling and heat dissipation effect will be deteriorated, making it easy to overheat the engine.
(4) Since the circulation speed of the lubricant is slow, the number of passages through the filter is small, and it is difficult to timely remove the worn out metallic dust, carbon particles, dust and other impurities from the friction surface.
Therefore, do not use lubricating oils with excessive viscosity, and do not think that the higher the viscosity, the better. Under the condition of ensuring lubrication, according to the temperature range during use, use the lubricant with small viscosity as much as possible. However, for engines that have worn out relatively severely and have a relatively large gap, lubricants with a slightly higher viscosity can be used properly.
6 Engine oil is black. Engine oil is deteriorated. Engine oil works under harsh high temperature conditions and is easily oxidized and degraded, resulting in acidic synthetic polymer deposits, resulting in destructive lubrication.
In addition, the burning of the exhaust gas into the crankcase can also cause the engine oil to oxidize. Therefore, the oil used for a certain period of time is usually blackened and loses its proper lubrication. However, with the continuous improvement of the quality of lubricants, especially the promotion of the use of thickened engine oil, the blackening of engine oil does not necessarily mean that engine oil is deteriorated. . This is because the clean dispersant added to the viscosified engine oil disperses the deposits on the machine components in the oil, causing the engine oil to become black in color. Whether it is deteriorating or not, the testing of various indicators should be carried out, and oil quality should be changed according to the quality, so as to reduce unnecessary waste. For example, oils with a protective agent such as YY 102 will also turn black after a certain period of time. Therefore, black oil does not mean that the oil is deteriorating.
7 Use of multi-grade oils Multi-grade oils (also known as multi-viscosity oils) have the properties of light oils at low temperatures and heavy oils at high temperatures. Where multi-grade oils are used, a multi-grade oil can replace a variety of single-grade oils. Although multi-grade oils can meet extremely cold and warm seasons and heavy-duty engine oils, cold-start diesel engines that do not have difficulties are generally recommended to use single-viscosity oils, which will help extend engine life. Therefore, do not think it is best to use multi-viscosity lubricating oils.
8 It is well known that filling with lubricants is not much less than the risk of engine oil being too little. Therefore, some owners are afraid of lack of oil and tile, and the amount of lubricants added is often excessive. Too many lubricants have many hazards:
(1) Crankshaft agitation causes the oil to form a large amount of foam and degenerate, increasing crankshaft rotation resistance, not only increasing engine fuel consumption, but also reducing engine power.
(2) As the oil flows along the cylinder wall to the combustion chamber, “burning oil†is caused, which increases the consumption of oil and deteriorates the emission.
(3) Accelerated the formation of carbon deposits in the combustion chamber, making the engine prone to deflagration.
Therefore, it is a misunderstanding that the engine oil is rather less, and the general oil level should be kept slightly below the dipstick.
9 The universal joint grease is clearly specified in the general vehicle maintenance manual: the gear shaft and the intermediate bearing of the telescopic sleeve use calcium-based grease, the cross shaft needle roller bearing and the three-bridge drive vehicle rear axle. The transmission of the middle bearing uses gear oil. However, in actual work, due to the lack of refuelling equipment, some repairmen mistakenly lubricate the cross-axis needle roller bearing with calcium-based grease in order to facilitate the drawing, causing premature damage to a large number of cross-axis bearings. Since the mouth of the universal joint cross-fuelling gear oil is a very common grease nipple, it often causes a misunderstanding. In fact, the grease is not filled with needle roller bearings. Because of the large viscosity of the grease, when grease is applied to the inner cavity of the cross shaft through the grease nipple with a grease gun, the resistance of the grease into the confined inner oil passage is large. At this time, the grease presses against the pressure reducing valve opposite the nozzle. When it overflows, the repairman mistakenly believes that the bearing has been filled with oil. Therefore, gear oil should be filled with a gear oil pressure gun.
10 Grease When Installing Cylinder Pads Some repairers prefer to apply a layer of butter to the cylinder pad when installing the cylinder pad, which is believed to increase the engine's tightness. However, doing so is not only useless but harmful. The cylinder head gasket is an important sealing element between the engine block and the cylinder head. It not only strictly seals the high-temperature and high-pressure gas in the cylinder, but also seals the cooling water and engine oil that penetrates the cylinder head and the cylinder block. If grease is applied to the cylinder head, some of the grease will be squeezed into the cylinder water passage or oil passage when the cylinder head bolt is tightened. Grease left on the cylinder pad is affected by high temperature, some of which will flow into the cylinder to burn off, and the other part will be burned and deposited on the joint surface of the cylinder block and the cylinder head, causing the engine to leak. Therefore, do not apply grease when installing the cylinder head gasket.
11 Applying grease to tire bolts or nuts To ease tightening of nuts and prevent corrosion, many repairmen apply grease to the nuts and bolts. In fact, this is a wrong practice. According to the mechanical principle, the self-locking characteristics of the threads after the tightening of the nuts are the reason that the thread helix angle is smaller than the equivalent friction angle between the threads. In the set bolting connection, the helix angle is a certain value, and the equivalent friction angle changes with the frictional state between the threads. Obviously, the equivalent friction angle between the threads after oiling is reduced, and the self-locking performance of the bolt connection is deteriorated. Therefore, do not apply grease to the bolts and nuts of the tire to prevent loosening of the tire.
12 Grease thinning by adding lubricating oil Some repairers prefer to dilute the grease when they use it in winter. This practice is wrong. Because the structure of the grease is a colloidal structure composed of a thickening agent and a base oil, the thickening agent forms a structural network, and a base oil (usually an ordinary lubricating oil) is adsorbed on the network to form a stable structural system to ensure the thickening agent. And the base oil will not be separated. If the oil is added after the fat has been added, it may not be evenly dispersed and contained in the network, but it is easily separated and lost during use, which is not conducive to lubrication. If a small-thickness grease is needed in winter, use the No. 1 or No. 2 calcium-based grease with a small number.
Vanillin is a phenolic aldehyde, which is an organic compound with the molecular formula C8H8O3. Its functional groups include aldehyde, hydroxyl, and ether. It is the primary component of the extract of the vanilla bean. Synthetic vanillin is now used more often than natural vanilla extract as a flavoring agent in foods, beverages, and pharmaceuticals.Vanillin and ethylvanillin are used by the food industry; ethylvanillin is more expensive, but has a stronger note. It differs from vanillin by having an ethoxy group (–O–CH2CH3) instead of a methoxy group (–O–CH3).
Our Annual output is 1000mt. We have professional product line for Food Flavourings Vanillin. Our products are Kosher, ISO, Haccp, Halal certified with best quality and strict quality control.
With regards to the productions and quality control, We has advanced manufacturing facilities and professional R&D team which providing customers with safe, healthy, hygienic and high-quality products. All the productions are processed strictly in accordance with the regulations of HACCP and ISO system. We also provide value-added services based on customers` personalized requirements in both product application and technical support.
We wholesale and promise the high quality of Vanillin with competitive price, buy Vanillin Food Grade at RP International
12 misunderstandings in the use of lubricant grease
The correct and reasonable selection of lubricating oil and grease can ensure the power of the vehicle, improve the reliability of the vehicle and prolong the service life of the vehicle. However, in practical use, there are many misunderstandings in the selection of lubricants and greases, resulting in serious The adverse consequences.