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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Over greased bearing behavior.
Registered Member If you put to much grease in a bearing temperature will rise due to churning. The standard behavior of new/recently greased bearings is a rapid temperature rise after the first start and subsequently a drop in operating temperature to more normal temperatures during the next hours - if the excess grease can be worked out of the bearing (enough room and no seals). If the bearings are really overfilled (which should not happen when the pump manufacturer knows how to apply grease to a bearing)... [ more ]
Registered Member Yeah, 220F is getting warm. That grease won't last long at those temps. When we rebuild lathe spindles we go through a lengthy "run in" process where we monitor vibration and temperature. Spindle speed increases with time, if temps on the front spindle reach 130F the spindle is slowed down until temps stabilize and then ramped up again until max speed can be reached. This process gives the grease time to work its way out of the bearing without generating too much heat. It's not a pump but an... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Bacteria in Food Grade grease
Registered Member Is it ok to you John if can I have a copy of lab test data showing that salmonella can survive in normal grease. [ more ]
Registered Member Schaeffer's food grade grease has gone through extensive testing and is used in several large manufacturers for its anti-microbial capabilities. Specifically the length of effective kill time for salmonella. Additionally, it is water-proof which significantly reduces consumption from wash out. [ more ]
Registered Member there are Antimicrobial Grease in the market today specially for food manufacturing, they developed this lube to kill bacteria if they enter into the bearing. I'm still looking if the bacteria can survive in grease. Thanks John for the link. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Low Total Acid Number
Registered Member I just copy this from one white paper: [ more ]
Registered Member We have a similar thing with our turbine lube oil. Typical Properties from the manufacturers data sheet quotes a Neutralization Number of 0.11 mgKOH/g, where as our oil samples return a TAN typically in the range 0.05-0.07 mgKOH/g. I have asked this question of our oil OEM technical rep but not had an answer. I can only assume that this would be a more of a maximum value rather than a typical delivered value. [ more ]
Registered Member Steve, not that this is the oil in question, but noting the OP is on an Air Force base, I found a "typical" set of specs that do give TAN (0.08). Just scroll down to the specs. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Paricle count Error reading
Registered Member Any Emerson rep to answer this as per RELI PREDICT question above? is it feasible to analyse the normal dark diesel engine? [ more ]
Registered Member Selva, Oil replacement every 250 hrs its a bit strange!!! As richard said soot/fuel contamination could be a possibility. Also check for proper grade of oil being used. Sometimes, a lower grade oil may undergo excessive oxidation within few hrs of operation. If chemistry/contamination Index and viscosity is OK then may be u should not bother much. Also, you may check with CSI in details about feasibility of using particle count for diesel engine oils???? [ more ]
Registered Member Most oils in any type internal combustion engine will turn dark within a few days of changing it, especially a diesel that is running 24/7. My dozer will change darker within 24 hours of an oil change, it's the nature of the beast. If dark color is the only thing bothering you, I would quit worrying. Do as suggested above and get a quality oil lab to do some CI oil test for you. You may find, unless your Cummins is worn out, that you're throwing away some awfully good oil. As a test for... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
RBOT / RVOT problem
Registered Member Based on what you have provided the reason for the decrease looks likely to be that the additives are depleting since the TAN is starting to increase along with this, and if this is the case I would expect a corresponding increase in the varnishing potential of the oil in the future due to the increasing oxidisation rate and decreasing capacity of the oil to keep the soluble particle sin solution (without knowing what you are doing to manage any of this of course). The exact cause of the... [ more ]
Registered Member IMHO turbine oil should never be condemned or replaced based on RPVOT because the test methodology has too great of a variance. Turbine oil will see a drop in RPVOT value of sometime 50% within a few years and then level off. As stated by Electricpete there are better tests out there to determine the condition of the oil. I always do the RULER test to determine the level of anti-oxidation additives vs the baseline. Even the most extensive testing is far cheaper than replacing the oil. [ more ]
Registered Member Dear Richard, here is information of the oil : How old is the oil? 5 year How much has the RBOT number decreased? November 2013 = 350 February 2014 = 331 May 2014 = 301 the manufacturer of our turbine is FUJI. based on FUJI manual, RBOT must > 100 if it lower than the oil must be changed. How clean is it? particle count on last measurement is 16/13/10 Has the viscosity changed? No Are there contaminants or wear particles in the oil which can act as oxidization catalysts (e.g. copper)? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
heat exchangers
Registered Member There is no manual and the temps are 210F and 198F the higher temp is the bearing closest to the fan, we don't have a diffuser. Taken off because there was a concern it was rubbing and causing a fire. I believe that the water should be going through slow enough to transfer heat from the oil and that it should be throttled back until i get warm water coming out of the drain. Sound reasonable? [ more ]
Registered Member Dear UberDan, How high bearing temperature that you had observed, with the existing system? [ more ]
Registered Member Is the outlet temp of the cooling water not mentioned in the OEM user manual? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Replacement frequency for Cooling Tower Gearbox Oil
Registered Member Our plant is Power plant where we use 14 Cells Cooling tower. All 14 cells cooling tower gearbox lubrication oil is Servo system 100(Mineral oil). Now i would like to go for synthetic oil, will i conserve energy of Motor., Will i able to reduce my Auxillary power consumption by adapting synthetic oil. Can any one comment on this if they experience. [ more ]
Registered Member BSPARKS what desiccant breathers are you using? [ more ]
Registered Member Here are some comments from Amarillo regarding CJC filtration: Does the filter blindly strip out the additives in my oil? No. Some additives exist in the oil and are considered sacrificial. That is they attach themselves to very small particulates to enhance their size so that they can be removed by filtration. Once filtration begins, the particle is removed from the oil causing a reduction in particle count and additive concentration. The additive has done its job, as well as the filter. In... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Practical ways to detect and remove gearbox water
Registered Member Hi David, I know you were kind of ruling out anything "fancy" but here is our solution for water and dirt in gearboxes. http://www.klassenhydraulics.c...5-25_PSST1000-UK.pdf Continuous kidney loop oil filtration will remove water and dirt 24/7. It doesn't necessarily have to be an expensive system. Some of our small filters are only 2k. Typically we see payback for these units in 6 months to 1 year. If you extend the life of your oil by 2-3 times the system pays for itself quickly. In... [ more ]
Registered Member Check some of the sightglasses at this link. I have used the ones with the petcock drains. They did well. [ more ]
Registered Member ..You mount a street ell or 90 degree elbow to the drain plug hole with a pipe nipple that extends above the gearbox oil level. This way you can inspect for free water and oil level at the same time. You would have to be able to swing the pipe nipple down towards the floor and allow the free water to evavcuate. As far as the dissolved water, its best to use a vac dehydrator or a CCjensen unit. Be careful not to filter too can filter the additive package out of gear oil. Brett [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
chiller oil analysis
Registered Member for a floaded screw compressor system: - Becarefull when taking sample, because the system is pressurized (10 - 25 bar usually, and containing refrigerant - Oil viscosity result may showing drop, out of ISO VG classification consult your OEM, how many percentage of the oil viscosity drop which still acceptable for your compressor [ more ]
Registered Member thank you john I decide to sample and analysis in term of your comments. [ more ]
Registered Member If I understand your question you think because the number of machine operating hours is relatively low, the oil need not be tested. However, depending on the design of the lubrication system there can still be a buildup of moisture. Although you might be able to lengthen the test intervals, I would still suggest a test be performed. I would also circulate the lubricant for an hour or so prior to taking the sample. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
for Mobil vacuoline 137 and 537
Registered Member thank you Nurudin. I have asked the local mobil supplier but didn't get any useful information. I was just told 500 series better than 100. for detail different they don't know either. for me the problem is one old machine used 137 run well for many years,but the same new machine used 537 according to the instruction from manufacture often damage because of bearing wear. I suppose to the root cause is different oil. [ more ]
Registered Member Oceandeep, How are you ? MOBIL Vacuoline 100 Series and 500 Series, both are circulating oil. but 500 series is having advantages in: - more wear protection - copper corrosion protection is better also (that is what i read from their technical datasheet) 500 series may litle bit expensive. We are using 100 series for oil crankcase reciprocating compressor. I am not an EXXON MOBIL personnel I just read google: - 500 series - 100 Series Further detail you can ask EXXON Mobil technical support... [ more ]
Registered Member no any reply disappointed me......... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Machinary Lubrication for begginer
Registered Member Dont forget to use google, to find the technical support personnel for: * Lubricant Manufacturer (SHELL, FUCHS, EXXON MOBIL, CASTROL, etc), which near by you * Oil Analysis Laboratory which near by you sometime the can help you, by providing literature, handbooks, CD, access to their private web site, etc. When you facing difficulty to undertand things that you read, so discuss it with someone who having knowledge of it. Regards [ more ]
Registered Member hello john, I have the same problem as RE-Engineer,recently I will shorten the lubrication list and I need study base knowledge,so do you mind also send your material to me? below is my mail,thanks [ more ]
Registered Member RE-Engr I am not sure about what do you mean by wanting "to learn new things"? What new things that you want to learn? Are these new things as per your questions in your first post? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
High Water Content in Oil
Registered Member I'm going to throw in some thoughts. My experience is with gearbox lubes of similar viscosity. - The ppm limit of every oil is different. Many oils won't hold 200ppm at room temp, much less 500ppm. Try to find free water too. - That said, the saturation point of the oil is certainly the highest possible limit for use in PdM, since a higher limit will never work. The approx saturation limit of the oil can be obtained by a phone call to the lubricant manufacturer. [ more ]
Registered Member Qoute: - Water content, MAX 0.05% THE UNIT OF DISTILLATION IS IN PERCENTAGE, NOT IN PPM Nurudin $ others Is it true that the water content won't be specified in the oil composition in the product data sheet by the oil manufacturer? [ more ]
Registered Member I thought the table in the bottom of Page 1 of the spec sheet that states water content to be less than 50 and 100 ppm should be able to convince them. How long have you joined them? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Zerk fitting caps - worth it?
Registered Member Sorry, I got several good results from my search using keywords: bearings and lubrication do's and don'ts. I edited in my post above. [ more ]
Registered Member LOL Candy. I don't need to know how to grease a pan or what to do with bacon grease. I know you meant well HAHA happy Friday! Thanks Northern - I like the site and hope to learn a lot here about maintenance practices. Have a good one [ more ]
Registered Member Candy, I think you would have netted better results here.... http://www.machinerylubricatio...uery=proper+greasing [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
3 lubrication KPIs to reduce equipment failure
Registered Member Nurudin Very interesting, very focused lub KPIs. Have you got results for the lub KPIs that you mentioned above? [ more ]
Registered Member Lubrication KPI: * What is the percentage of re-lubrication (oil change) as well as re-greasing task completion? and How many day is the maximum delay of executing the task? * How fast re-lubrication (oil change) as well as re-greasing are done. (make it as: manhours/liter oil volume) * How big the percentage of abnormal cases based on oil analysis record in a year? * How many cases of water contamination in a year ? * How many cases of wrong lubricant sellection in a year? * How many cases... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Converting Motor Bearings to Circulating Oil
Registered Member I was reading an article by Heinz Bloch and I noticed he touched on the subject of oil ring behavior during startup of sleeve bearing machines. I'm not sure I fully understand his point. At one point he mentions a need for constant viscosity (which to me might suggest high VI synth oil, but he doesn't talk about that here) and at another he talks about problems with high viscosity. I guess his main point is with high viscosity at cold startup, it'll take longer for oil rings to get the high... [ more ]
Registered Member We have a proposal that just came across my desk for a small pump to ciculate a small quanity of oil from the bearing reservoir to the top of the bearing prior to a start. It would tie into the start permissive logic so if the pump didn't run for 30 seconds the starting motor wouldn't kick on. This particular setup has been used on dragline motors at some mines. All it takes is $$$$ [ more ]
Registered Member Thanks. That makes sense. Sleeve bearings have highest friction during start and it is particularly severe if oil ring machines have been idle for long periods and all traces of oil drain out of the bearing itself into the reservoir below.. The particular approach we use wouldn't work since we just inject low pressure oil directly into the bearing reservoir and it never reaches the bearing if the machine is secured. You could use similar setup except I imagine you'd want to feed low pressure... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Technical oil lubrication (Oil ring...)
Registered Member In actual there is a large color difference. [ more ]
Registered Member Every surface in the photo had a brown colored dust. Was the outer surface of the glass oil reservoir wiped clean before judging the oil inside it to be discolored? Walt [ more ]
Registered Member ....this looks like a BFW pump...if the oil is discolored you can change the oil with a reservoir flush. If it still changes color, yes the ring is wearing and seals. If this a continually pressure fed bearing housing why have the oil bulb on the side? We eliminated those type of bulbs years back and added visual flow meters to insure oil flow. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
mobile gly vs mobile gear
Registered Member Hi Sherief, The main difficulty you have is the Mobil polyglycol 320 is incidental contact food grade lubricant whereas the Mobil XMP gear 320 is a no contact with food lubricant as its a normal EP Gear Oil so if the drives are above the processed PET Pellets then as John stated you can not apply the Mobil XMP gear 320 and you will have to use a food grade product, if however the drives are below the the processed product with no possibility of gear fluid contact if leakage occurs with the... [ more ]
Registered Member Food grade pet food is important to pet owners. Since you don't seem able or willing to tell me the machine specifics and how the machine might be used in the production process, then I suggest you stay with the current food grade lubricant or check with the machine OEM for a suitable alternative. [ more ]
Registered Member we are recycling plant from pet bottles to food grade pet pellets [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
kluber 461
Registered Member I would lean more towards a water proof food grade grease. Schaeffer's 195 is an aluminum complex H-1 grease. Switching to a food grade A/C grease would require a flush but you would see a substantial drop in grease consumption as a result of the water proof capabilities. Email me at I will send you technical data and info on the Cairo distributor. [ more ]
Registered Member By use of PET do you mean plastic bottles made of polyethylene terephthalate? It would also be good to be very specific about the application . For example, what you might use in the wheel bearings of a fork lift truck might be different than the grease used in the rollers of a conveyor belt moving food grade bottles. We need to know exactly the intended use before making a recommendation. [ more ]
Registered Member we are PET bottles washing plant , we wash by hot water 95c and some soda and detergen [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Lube oil RPVOT and additives oxidation
Registered Member It would be helpfull if you posted the type of lubricant, age and application. RPVOT is an older analysis test that has been mainly surplanted by more advanced analysis such as RULER and varnish potential tests. In the past when evaluating turbine oils and I've only had RPVOT data to work with I would closely watch TAN in conjunction with the RPVOT number. If I saw an increase in TAN with a corresponding low RPVOT that would spur some action. Of course verify your data, LOA is cheap compared... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Question on Jax-68 viscosity
Registered Member Your supplier should have that info. I checked the Jax website and couldn't readily locate it. Seems fairly obvious it's not capable of handling the cold temps your experiencing. That leaves two options. 1. Keep doing what your doing with the heaters. Or 2. Look for a more capable food grade hydraulic fluid. Are you willing to test something else? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Oil Contaminant List
Registered Member Thanks guys. Exactly what I needed. I actually did a level 1 course with Noria about 10 years ago. Since then I've pretty much been doing vibration analysis, thermography and ultrasound, but very little oil analysis. That's all changing now. I've still got the course notes, so I'll have to start flicking through them. [ more ]
Registered Member Here's another one. The PPM numbers are geared towards an engine but for the most part you can make it work. Remember trending is your friend. I also recommend a class with Noria, they know their stuff and do a pretty decent job of teaching it. [ more ]
Registered Member Here's a link to one. I was looking for a table from PdMA (I think) that is the same or very similar. If you get the chance, a training class from Noria would be beneficial. Good luck. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Bull Gear Grease Additive
Registered Member Thanks John I will look into the products you listed for me. [ more ]
Registered Member I am going to guess that you are asking this question with respect to open gearing so correct me if I am wrong on the type of service. The gear OEM, where I worked for many years, recommended for open gearing, products like you might see at . With a properly selected lubricant there would not be any reason why additional "additives" should be necessary and the gearing OEM should be consulted. If you examine the product data sheet at the... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
GE Frame 7 Lubrication
Registered Member Its detergent in nature – it can clean up the varnish from older systems. ------- Gumatech [ more ]
Registered Member Take a look at the new GEK32568H, which calls out the use of PAG lube oils and the benefits of it. EcoSafe TF-25 can really help out with the issues that plague the turbine industry. [ more ]
Registered Member Check with GE but you might refer to attached. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Oils to use in Machinaries
Registered Member Some manufacturers won't go that far. They will provide a specification for oil and as long as the brand meets that spec you can choose any oil within those perimeters. [ more ]
Registered Member Hi Zoey, As John says you need to check with the maker of your machines. On our machines we have documentation which gives 3 or 4 different brands of lubrication and which product they recommend for which section of machine. As different sites use different suppliers for lubrication the equipment makers cover most of the options this way. It is only in specialized machinery in which I only see one brand of oil. [ more ]
Registered Member The nature of your question is such that the only and best recommendation is to check with the machine manufacturer. This is just to broad an area to summarize in a forum without knowing very specifically the machines. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Greace for hog and large fan
Registered Member Hi, In harmermill manual I see that Jeffrey said use Shell Alvania EP #2 ou #3 ou Mobilux EP #2 ou Gulfcrown grease EP #2. I tell to Shell to have a grease for this equipment and shell recommends to use Shell Gadus S2 V220 2. For fan I dont find any recommendation in the manual. But Shell recommand to use Shell Gadus S5 V100 2. Tank you James for your proposition. I will talk also about this possibility. [ more ]
Registered Member For motor we use always Gadus SL2 (old name Cyrina RA). Robinson is the fan manufacturer. Do I can use Gadus SL2 for fan bearing? Do it is a equivalent? Thank you [ more ]
Registered Member Motor probably needs Polyrex EM-check motor tag Fan bearings should use Mobil XHP 222blue or equiv. Chevron SRI #2 who is fan manufacturer? [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Bearing Temperature and Lube
Registered Member Based on numbers above and reference above, to avoid making this a special application requiring SKF Application Engineering review, even assuming light load and low Fa/Fr, you’d still need Dm* N < 70% of 350,000 = 245,000 Dm*N < 245,000 N < 245,000 / Dm = 245,000 / 140 = 1,750 rpm [ more ]
Registered Member Mr. R, Sounds like an ideal job for an auto-luber. I agree with Aubrey about the ultrasonic luber, but in a pinch, listen to the bearing with a stethoscope and you will hear when the new grease enters the load zone and quiets the bearing. Then set up the auto-luber for that amount of grease. I agree with others on this thread that the amount of grease called for is excessive. Fan speed also sounds high for the bearing. What is the speed limitations for that bearing with grease? Regards, Ron ... [ more ]
Registered Member Good comments all around. Definitely most greased bearings tend to run hot for an hour to a day or so after greasing. It’s rarely a good idea to keep adding until you see grease appear. However if you’re adding and you do see fresh grease appearing at the drain, then you should definitely stop even if you haven’t added the target amount (and take a step back and think about whether anything should be done about the full cavity… possibly longer-term action). I agree with Steve that it seems... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Lubrication selection & ramifications
Registered Member was never intended by any of my comments here or on the other thread, simply technical information hopefully of value to the reader and based on almost 20 years of direct gear related experience. In all honesty, I have never seen drastic temperature reductions (like the 20 to 40 degrees claimed) due solely to a lubricant change. When changes like the stated occur and the instance properly investigated there is often also some other underlying contributing factor that is corrected in the... [ more ]
Registered Member Certainly professional responsibility is of paramount importance. However, when there is advanced lubricant technology out there, how should a sales rep go about disseminating information that will not draw ridicule and backlash? It is also professionally responsible to find the most cost effective, mechanical stable process. Surely you can accept that many recommendations of an OEM for a particular lubricant are financially motivated benefiting the OEM. As long as maintenance professionals... [ more ]
Registered Member John is right on with this observation, often a sales rep will try to convince the end user that their particular formulation of lubricant will cure all ills but if your not doing your homework it can end up in a bad situation. Another lube related pet peeve I have is the OEM's that sell oil to satisfy warranties. Rarely have I seen this situation where the added costs are worth buying from the OEM. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Cooling Tower Gearbox Wear
Registered Member The issue i would have with that product is it's an R&O Gear Lubricant. Most rust and oxidation inhibited (R&O) gear lubricants do not contain antiscuff additives or lubricity agents and the OP has a gearbox with known scuffing issues. His issues are very likely the result of transient overloads at startup caused by an induction motor experiencing a very high load inertia. R&O lubricants are considered good for gear applications that are typically operating at relatively high... [ more ]
Registered Member You are absolutely correct John. Thanks for pointing out my error. I only looked at cross reference and did not take into consideration the Amarillo OEM specs. So, after consulting the chief chemist and a CLS, Ive attached information on the specific lubricant that has been used in this type application with great success. [ more ]
Registered Member I too can guarantee there is some air moving around that gearbox in spite of the rain cap. D [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
SHC 220 vs SHC 630 Mobil oil
Registered Member We used to use a lot of Mobilgear 630 in our Falk gearboxes, but we have since switched to SHC 220 synthetic oil. They are both a 220 weight, we have also phased out Spartan EP 150 and went with SHC 220, with manufacturer's ok. Mobil lube experts will tell you that you can usually go up one viscosity grade if you're going up to a synthetic grade. [ more ]
Registered Member Thank you for your input. [ more ]
Registered Member As I said one has to be cautious on naming the product you have an interest in. I don't think there is such a thing as Mobilgear SHC 630. In my previous post I attached the product data sheet for the Mobilgear SHC Series and you will note that there is a Mobilgear SHC 480 and a 680. Note as well that these are called "Gear Oils". Now there is a series called Mobil SHC 600 Series Gear and Bearing Oils which includes a product with a 630 designation. Note the use of "Mobil" as opposed to... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Low Viscosity in oil
Registered Member A 10% change from baseline / new oil seems like a standard rule of thumb, we use it pretty extensively. One thing to consider is your sampling frequency. If the viscosity is changing due to oxidation, contamination, etc., the change most likely won't be linear. Consider where your viscosity may end up prior to the oil change and act accordingly. [ more ]
Registered Member Hi NVT We set 1st warning at 10% and suggest oil change @ 15% increase or decrease in viscosity. Because we are monitoring by microscope sometime we can exceed these values but we are monitoring the particulate in the sample looking for degraded lubricant debris, Regards Rob S [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
viscosity conversion at different temperatures
Registered Member Thank you for your response Pete. But like you said, the ASTM D341 equation only applies to petroleum products and propylene glycol does not fall under such category. I ended up using the Jouyban-Acree model to acquire the appropriate equation. Thank you Nurudin for a response as well. [ more ]
Registered Member For ASTM D 341 better using graph just plot two known point and we can predict the othre. for online software, we can use this link [ more ]
Registered Member The spreadsheet is limited to petroleum products at temperatures where the are above 2cSt. More details: The general form of the relationship eqn used in the spreadsheet is log (log(Z)) = A - B log T (from ASTM D341) ASTM D341 gives various expressions for Z depending on what range you want the forumula to be accurate over. Specifically: Z = (v + 0.7) from 2E7 cSt down to 2.00 cSt Z = (v + 0.7 + C) from 2E7 cSt down to 1.65 cSt Z = (v + 0.7 + C − D) from 2E7 cSt down to 0.90 cSt Z = (v + 0.7... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Dodge Cool Lube-2 System
Registered Member No, I havent ordered anything yet just talked to the dodge rep fri for the first time. Trying to get things in line for our yearly outage in sept. [ more ]
Registered Member Is it already going on? [ more ]
Registered Member Ah I didn't say what I was going to be using therefore I'm not sure where you come up with I'm using as "comodity type lube". What I am going to be using based on Mobil Engineering calcs on my equip. is Mobil SHC 627 at a flow of 0.20 GPM. Just looking for anyone who has used this type of setup in the feild. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Turbine Oil Flush
Registered Member Hi RGF, C.C.JENSEN has developed a varnish removal unit which is specifically designed to remove varnish and particles from turbine lube oil. I echo the sentiments stated above that new oil is likely not that clean and should be filtered before using. Have a look at the below case studies: (3 pages) [ more ]
Registered Member John-this was a simple cycle CT plant that came to an abrupt halt from 3600 RPM. They are going to do an inspection and cleaning prior to the flush so all the big junks should be removed. I know were replacing the rotor air coolers and the motors on the oil coolers but I don't know the details on what else is being done to the oil coolers. [ more ]
Registered Member rgf12, what if anything are you doing to the heat exchangers? From the content of your post, I'm assuming that the "catastropic failure" may have released debris into the lube system. I have been involved with some gearbox failures of multiple units. The initial rebuild of the first failure and subsequent flush took so long to clean up that on the subsequent failures we replaced the heat exchangers. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Nat gas flooded screw compressor filtration
Registered Member Hi Alex, I work for the company C.C.JENSEN, we provide kidney loop oil filtration systems. Kidney loop filtration is fitted to draw oil from the bottom of the oil reservoir. The filter is a cellulose depth media that filters to 3 micron absolute. Filters will remove particles, water, varnish, sludge, and degradation products. If you would like more information or to see some case studies let me know. PS. this is my first post so I hope I am not violating some terms of service rule re... [ more ]
Registered Member Alex, I came across several oil flooded screw compressors and faced similar issues. Mainly they are in air service. Key is inlet filters for filters which removes particles of even less than a micron. Which kind of filters you have for natural gas ? It is preferable to prevent solids from entering the compressor rather than purifying oil continuously. Another point is control of discharge gas temperature by controlling oil flow. Higher temperature means higher degradation of oil. Last point... [ more ]
Registered Member Particle which is detected as Fe2O3, Wow? I face the similar situation before (Frequent high filter DP and black iron particle are trap in the filter element), it is looklike your compressor is having problem, and waiting for fail. "The lubricant may be not reach to the destination point" or "The oil flow is less than the required" [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Detergents Function in Lubricant
Registered Member Detergent usually used along with the function of Despersant (Detergent - Despersant) Detergent : To take the contaminant, which mean not deposited on the metal surface Despersant : To make the size of the contaminant become smaller, so that it will easy to be hold (dissolve / not aglomerate) These molecule (detergent-despersant) is having two hand. One hand will holding base oil, and the other hand will take/carry the contaminant. upto a certain limit, this molecule not able to handle more... [ more ]
Registered Member Go to . I think you will find detergents more prevalent in engine lubricants. [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Registered Member Zaheer, There are a lot of Additive manufacturer in the world, and the famous are: - Oronite - Lubrizol - Infineum - Etc, The additive package (which are manufactured by them), are purchased and consumed by Lube Oil Manufacturer (Like SHELL, FUCHS, MOBIL, etc). Lube oil Manufacturer will blend the base oil + additives, to become Lubricant. Each additives manufacturer are having technology. The technology may vary from one additive company to others. YES, the chemical composition become... [ more ]
Registered Member I'm not sure why this has been so difficult. There are many different types of additives and are arranged in many different recipes depending on manufacturer and product type. A very rough estimate on product make up would be 80% base oil and 20% additives. So if both products are using a paraffinic petroleum base then roughly 80% of both products are the same. If Shell uses detergent x and Mobil uses detergent y then there will be performance differences albeit minor. Maybe Shell uses... [ more ]
Registered Member Dear John I was told that every lubricant manufacturer has their detergents different which are used as additives in base oil??????????? Your have also mentioned that there is smewhat difference in additives.... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
World 1st Lubricant
Registered Member Dear all According to Bill, The first ever lubricant of the world is being used continuously from stone age to 21st century in the rainy days.... [ more ]
Registered Member Let it go at that. Don't go into depth with Bill's explanation. [ more ]
Registered Member Dear William You r right... I was asked this question by manager....I replied water...... [ more ]
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Asset Condition ManagementPosts About Lubrication and Oil Analysis
Acceptance testing for Diesel fuel
Registered Member Thanks for the feed back. We are looking into small building close to the off load point to set everything up in. I have recently been in contact with spectro and they have given me some usefull information to look at. [ more ]
Registered Member I think most of particle counter instrument are portable. But it may better if you have small closed shelter, near by the recieving area dedicated for the particle count test. as additional of particle count test, it may better also if you do density test, and Screening test by portable FTIR (check with SPECTRO). We did before to find the percentage of kerosene content in the diesel fuel. [ more ]
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