Thank you for visiting the article. We are a website that provides information about the key to the answer, education, physical subjects, subjects chemistry, mathematical subjects. In addition to information about we also provide articles about the good way of learning, experiential learning, and discuss about the sociology and psychology.
Library Archives Of Other articles besides we also provide a lot of information about mesothelioma book, mesothelioma free book, mesothelioma help scholarship, education, learning tips, tips, tips on physics, chemistry, math, tips and give a few eBooks that can be learned when you are facing the test. If an article about this beneficial for you, can you spread the word to your friends and companions, so that your friends also get benefits.
Shell Material # Product Name Pack Availability Mobil Cross 550026644 1.55ugl Active DTE HH 550026642 1.55ugl Active Velocite No. 6 550026733 1.55ugl Active Velocite No.
41 1.55ugl Active Teresstic 140 1.5ugl Active Teresstic 119 1.55ugl Active Teresstic 153 1.5ugl Active Teresstic 192 1.55ugl Active Teresstic 250 1.5ugl Active Teresstic 268 1.5ugl Active Teresstic 251 1.55ugl Active Teresstic 271 1.5ugl Active Mobil SHC 656 1.55ugl Active Mobil SHC 670 1.5ugl Active Mobil SHC 655 1.5ugl Active Mobil SHC 636.
CROSS-REFERENCE PRODUCT GUIDE FOR SYNTHETIC Synthetic lubricants offer a number of operational advantages over mineral-based products across a wide array of applications, including bearings, gearboxes, compressors, vacuum and diaphragm pumps, rotary shaft seals, valves, hydraulic systems, and instrumentation. Synthetics are the logical choice if: o Peformance demands are beyond petroleum product capabilities o Equipment failure of excessive downtime is traceable to ineffective lubrication products of practices o High or low temperatures are encountered (-75 to about 500 F) o Situations exist in which conventional products are ineffective. Some man-made lubricants cause less metal wear because they create a lower coefficient of friction in the load zone of non-conforming surfaces. This condition cuts maintenance, parts replacement, and energy costs. In addition, synthetics provide long life because of enhanced thermal and oxidative stability; and minimal sludge, corrosive, and deposit formations because of high temperature oxidation stability. The major drawback to the synthetic approach in an appropriate application is a significantly higher initial cost three times or more. Lab manual science class ix goyal brothers. However, this cost is usually recovered over the extended life of the product six times or more.
Also, systems subject to leakage or contamination are not usually good candidates for synthetic products. The chart on the following pages serves as a guide to selecting and applying synthetic oils and greases. The listings are based on information supplied by the 67 companies and are categorized according to viscosity.
However other important variables should be considered when selecting and applying the products. These factors include pour and flash points, demulsibility, lubricity, rust and corrosion protection, thermal and oxidation stability, antiwear properties, compatibility with seals and paints, and compliance with various testing and standard requirements. The products presented in each category are not necessarily interchangeable or compatible.
These two features depend on an assortment of interrelated factors, and each situation requires an individual analysis. Selecting A properly selected synthetic does the same job as any mineral oil, if not better, but no single product exceeds petroleum in every characteristic. Nevertheless, it is possible to formulate synthetic lubricants containing those features that are most important for a specific application. The result is an optimum compromise that petroleum products cannot usually match. Performance characteristics of synthetic lubricants come from the physical and chemical properties of the base fluids, and chemical properties of the base fluids, and the effects of additives introduced into the final product.
Physical and chemical qualities include viscosity-temperature behavior, low temperature fluidity, volatility, compatibility with paints and elastomers, ability to dissolve chemical additives, compatibility with petroleum, and hydrolytic stability. Additives are included to influence to a greater or lesser degree, oxidation stability, load bearing ability, and corrosion protection. Table I shows the relative performance characteristics of seven general types of synthetic lubricants and a paraffinic mineral oil. TYPES There are several classes of synthetic lubricants.
The most common are synthesized hydrocarbons, such as polyalphaolefins (PAO) and dialkylated benezenes. These products are the closest to the performance characteristics of mineral oils and are compatible with them. Other commonly used synthetic lubricants are organic esters, including dibasic acid esters (diesters) and polyol esters; phosphate esters; polyalkylene glycols (polyglycols); and silicones. SYNTHETIC HYDROCARBON FLUIDS (SHF) equal or exceed the best lubricating properties of mineral oils, but without the drawbacks.
These synthetic base fluids are manufactured from specific chemical compounds that are often petroleum derived. The SHF base fluids are made by chemically combining (synthesizing) various low-molecular-weight compounds to obtain base stocks with predictable desired properties. These man-made fluids are available in several viscosity grades and operate over a wide temperature range. The products serve as engine and turbine oils, hydraulic fluids, gear and bearing circulating oils, and compressor lubricants. SHF's are wax free, offer excellent hydrolytic and chemical stability, and provide low volatility.
ORGANIC ESTERS have shear-stable viscosities over a wide temperature range (-l00 to 400 F), high film strength, good metal wetting, and low vapor pressure at elevated temperatures. Organic esters easily accept additives, enhancing their applicability for finished product formulations such as crankcase oils and compressor lubricants. POLYOL ESTERS feature many of the advantages associated with dibasic acid esters, but perform at even higher temperatures. These esters are applied as high temperature chain lubricants and in industrial turbines. PHOSPHATE ESTERS are organic lubricants well suited for fire resistance applications.
POLYGLYCOLS offer excellent viscosity and temperature properties, and resist sludge buildup. Formulated products are used in applications from -40 to 400 F, and are low in toxicity. Because of their solubility characteristics, polyglycols are well suited for lubricating gears and bearings and compressors handling hydrocarbon gases. SILICONES are chemically inert, nontoxic, fire resistant, and water repellant. The products have low pour points and volatility, good low-temperature fluidity, and good oxidation and thermal stability up to very high temperatures. A disadvantage of silicones is their low surface tension, which permits excessive spreading on metal surfaces.
In addition, this product offers poor response to wear and friction-reducing additives. It is important to remember that synthetics are as different from each other as they are from petroleum lubricants. The performance of a synthetic and its applicability to any individual situation depends on the quality of the synthetic base stock and the additive package. Table II outlines several major applications for synthetics.
COMPATIBILITY Suitability of a specific synthetic for a given application often depends on the chemical compatibility with system components. In general, synthetic hydrocarbons, like PAOs, match well with seals, elastomers, paints, and plastics, while esters may not.
Mercedes benz c280 repair manual. Mercedes-Benz Maintenance Manuals contain information vital to ensuring your vehicle's continued operation at peak performance.
Would you like to receive an Internet Welcome Kit loaded with free samples? Search For Products Information Regarding Hydraulic Fluid Choice The information on this page is presented as a courtesy for our web guests. HFI Fluid Power Products does not actively involve itself with hydraulic fluid technical advice.
We primarily sell hydraulic adapters, tube and hose assemblies, as well as components such as valves. Hydraulic fluid is offered to our local customers, but we shy away from sales of hydraulic fluid outside of our local area. If the information you are looking for is not on this page, we suggest you contact the technical support of one of the US's larger hydraulic fluid producers, such as Shell Global. Their technical support phone number is 800-237-8645. Find your part FAST!
Your Part No Here: Also show me close matches HFI Fluid Power Products makes no guarantees or promises regarding the information provided below, and any information given regarding the choices of hydraulic fluid to use is listed as a guide only, and is subject to correction or improvement. How to determine the best choice of hydraulic fluid to use for your equipment or system. Although many manufactures of hydraulic fluid provide various grades of detergents and oxidation stability in the fluids they produce, the single factor that should weight the heaviest in determining the best choice of fluid to use is viscosity, otherwise known as the fluid's weight. Viscosity is also most often expressed as the fluids ISO number or grade.
Common ISO grades for use with hydraulic systems include 32, 46 and 68. Sometimes, 10, or 10 weight is mentioned as well. I would like to point out that for basic operation of any hydraulic system without concern to long-term effects of the systems life, 10W-40 automotive engine may be used, providing it does not contain degertant additives, and these additives used in engine oil can cause corrosion and cavitation. This occurs because the detergents can cause water that has condensed into the system to emulsify, preventing it from being seperated from the oil. It is recommended however, that a proper hydraulic fluid be used, and chosen based on its ISO grade.
These fluids do not contain harmful additives that can cause damage to components, and are designed to work within a specific temperature range. Higher viscosity hydraulic fluid tend to reduce the system's operating temperature by increasing the volumetric efficiency of the pump.
If the viscosity is too high, however, will cause poor mechanical effieciency by increased friction during startup, and may lead to cavitation. Finding the right ISO grade that balances the benefits of volumetric effeciency against the drawbacks of mechanical efficiency is the key to a good long term oil choice. Ultimatly the manufacturer of the equipment knows this value and is always best to consult the manufacturer to try to obtain the answer.
When it is not possible to do this, the age of the machinery may be taken into consideration, as the effects of heat and friction may affect the decision process. The following charts, provided by Paul Michael, Fluid Power Institute; Steven Herzog, Rohmax Oil Additives; Thelma Marougy, Eaton Hydraulics Operations, 'Determining Hydraulic Fluid Viscosity Requirements'. Machinery Lubrication Magazine.
Shell Oil Cross Reference Guide
January 2007 may be helpful in determining the correct ISO grade for your hydraulic system. Charts Provided By Machinery Lubrication Magazine, 2007 Figure 1. Effect on viscosity upon the volumetric and mechanical efficiency of hydraulic pumps Figure 2. Temperature Operating Window for 13 to 860 mm2/s (cSt), 100 VI Hydraulic Fluid Figure 3. Temperature Operating Window for Hydraulic System Operating at 45ºF to 150ºF HFI Fluid Power Products Hydraulic Fluid Product Line HFI supplies hydraulic fluid three ways, 55 gallon drum, 5 gallon pail, and by-the-gallon for walk in sales provided the customers supplies a container for the oil.
Filter Cross Reference Guide
The ISO weights we carry are: ISO 32 ISO 46 ISO 68 Hydraulic Fluid Cross Reference Chart The following chart may be used to cross over some of the more common brands of hydraulic fluid.
Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |