Tagged With "oil"

Topic

5000 ton cooling Tower gear box

Ahmed Kabir ·
Will there be any substantial change in the oil level from its normal mark while running? In the cooling tower of international airport HVAC system, the level of oil found very low from its normal mark. I know that a small drop can happen from the normal mark while running. Will there be any considerable drop?  Could anybody can help me?
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5000 ton cooling tower gear box

Ahmed Kabir ·
Will there be any substantial drop in the oil level of gear box from its normal mark while it is running? This gear box with 200 HP Drive motor for 5000 ton chiller. While it is running the level of oil comes down to its lowest in the sight glass.  Could it be considerably lower from its normal oil level mark while running? Please help me. Kabir  
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Compressor lube Oil flushing acceptable creteria

vikramdeeps ·
Guys , Generally for new compressor oil piping , we will do oil flushing for the lube oil system by installing fine mesh at identified locations , I just want to know the acceptable criteria for particles in mesh .
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Crude Oil Boilers & AQCS

Y7 ·
Greetings,  2 crude oil boilers are used to generate steam and air quality control system AQCS is provided at end of each, the whole system is provided by Macci company. ID fans and FD fans are provided by Boldrochi. The fans encountered several...
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Measuring amount of static build-up in oil

JeremyG ·
Hi All   Maintenance person working in a tank farm area here.   Circulating lubricating oils, especially through a filter/strainer, would cause static electricity build-up in them. Suppose we were to perform a recirculation with the product...
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OSA4 Microlab - anybody bought one and is it any good?

Hubbe01 ·
WE considering purchasing a Osa4 Microlab to enhance our oil analysis program. The Osa4 is designed for use in transportation industry. Do you think we coulduse this for our Oil Analysis program in Oil and Gas Industry. One short fall of the Lab is...
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seeking a pump assembly oil

Carson ·
I am looking for a pump assembly oil for our rebuilds. The pumps may sit on the shelf for a few years, so I'm looking for something that protects from rust, and is generally compatible with pump lubricant. We used to use ProTec Anti-Friction Metal Treatment, but can no longer buy it. Is there a good substitute out there?
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Temperature and Oil Viscosity

Jaxn14 ·
Dear all, I am new to oil analysis world. I have read few oil related articles/papers say that high operating temperature, overheating, would cause the oil viscosity to increase. Why is it? cause from my understanding the oil should get thinner (lower viscosity) as it absorbs heat likewise when the temperature is low then the oil should get thicker.   Regards
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Re: Crude Oil Boilers & AQCS

candy ·
Has the OEM responded commitedly after sales?
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Re: Crude Oil Boilers & AQCS

Y7 ·
There is inadequate support from OEM and manuals are not comprehensive enough for the troubleshooting and maintenance. The units were supplied 10 years ago. any idea if such units from similar supplier are used somewhere else?
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Re: Compressor lube Oil flushing acceptable creteria

Shurafa ·
The practice I follow is that no visible particles are found on the mesh. This is subjective and this is only used to qualify the oil to be sampled and analyzed in the lab. For the mesh evaluation, the results are sensitive to the mesh size, flushing duration, mesh location, filters used, volume of oil and it's initial cleanliness level. I hope this helps a little. Regards- Ali M. Al-Shurafa
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Re: Compressor lube Oil flushing acceptable creteria

vikramdeeps ·
Thanks ,need your help (F or the mesh evaluation, the results are sensitive to the mesh size) ,For example with 100 mesh size, What is acceptable particle count?
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Re: Compressor lube Oil flushing acceptable creteria

Shurafa ·
Particle count tests are usually done in labs (not on the site). The acceptance criteria depend on the machine, not on the mesh size, I guess. If the machine is sensitive to dirt like containing servo cylinders, the limit is relatively low (e.g. 16/14/12). You may like to refer to ISO 4406 for more details. I hope this helps a little. Regards-Ali M. Al-Shurafa
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Re: 5000 ton cooling tower gear box

John from PA ·
Yes, it likely will come down in the oil level sight glass. You should determine if the OEM specifies the level with the machine shut down, running, or in a few instances both. The machines I have worked with have the oil level gage outside the tower and a means to add oil from a position outside the tower. How much it varies is a function of the specific gearbox so if your next question is to ask "how much lower will it be?", don't expect a reliable answer, just "guessestimations". By the...
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Re: 5000 ton cooling tower gear box

IrishMark ·
Link doesnt work John From PA
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Re: 5000 ton cooling tower gear box

John from PA ·
Seems erratic so try https://www.maintenance.org/for...ion-and-oil-analysis
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Re: Temperature and Oil Viscosity

Gary Stacey ·
Overheating causes thermal failure of the oil i.e. oxidation and it is this which leads to viscosity increase. The oil becomes loaded with insolubles (varnish). Gary
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Re: Temperature and Oil Viscosity

rgf12 ·
What you and Gary state are both true. Most oils will not begin to oxidize until they reach a temperature of around 200 degrees F, less than the oxidation point the viscosity will change with temperature. Most oils have an temperature vs. viscosity curve available either from the oil company or somewhere on the web.
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Re: Temperature and Oil Viscosity

George NV ·
Agree , when oil temperature rises high it oxidizes , it is the additives that most deteriorate and produce solids ( varnish ) . These highly raise viscosity . Have seen this many times in case of aluminium rolling mill , finishing or foil , high speed , hence high temp. Every after chock removal and disassembly there is lot of dark brown varnish in the sump. BP guys after analysis say for additives burn off. So , need be careful for oil choice , especially synthetic ( PAO ? ) with special...
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Re: Measuring amount of static build-up in oil

JeremyG ·
Good links Have found the following API code(API 2003) regarding static build up in lubricating oils, and how to manage them. Basically -Electrostatic Voltmeter (if a way can be found to immerse it in a reservoir) -Charge density Meter (designed to operate immersed in a charge non-conducting liquid) Cheers
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Re: OSA4 Microlab - anybody bought one and is it any good?

Hubbe01 ·
It might be possible that the Gen or turbine is not expanding axially properly. Check on the turbine side, guide rails to see if the turbine is misaligned on the guiderail. Check if the expansion displacemnt probes are setup correctly and recording the expansion. check if your Steam control valve are synchronizing properly and distrubuting the steam evenly. Expansion of the train is away from the generator towards the turbine
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Re: OSA4 Microlab - anybody bought one and is it any good?

IrishMark ·
@hubbe think you've responded to a wrong thread.
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Re: OSA4 Microlab - anybody bought one and is it any good?

Hubbe01 ·
I posted this quiry to the forum. And Hope some would reply soon.
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Re: OSA4 Microlab - anybody bought one and is it any good?

John from PA ·
I haven’t used it but just based on a web search of several sites and reading the list of features it doesn’t seem appropriate for O&G except for perhaps some limited use. What are your machine types? …the MicroLab can test all types of lubricants from engine oils to fluids for hydraulics, transmissions, power steering, gearboxes and generators. …is a complete analytical system that delivers comprehensive test results for machine lubricants, including engine and gear box oils, hydraulic,...
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Re: OSA4 Microlab - anybody bought one and is it any good?

Nurudin ·
OSA4 is an excellent system. Easy to be used, and having ready oil analysis software database system. From my observation, OSA4 usually used by mining company, Heavy duty equipment contractor company which business is in mining sector, where engine oil analysis are dominant. But for oil&gas / petrochemical, you will analyzing TAN more than TBN. I prefer (for your case) to let the regular/routine oil analysis done by QA / Laboratory department, using the approved and dedicated ASTM...
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Re: Measuring amount of static build-up in oil

John from PA ·
The article at http://www.machinerylubricatio...t_pos=0&at_tot=1 may be of interest and probably this one to a lesser degree. http://www.machinerylubricatio...tic-charge-hydraulic
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Re: Measuring amount of static build-up in oil

Walt Strong ·
I have no direct experience with this, but Google: "measure static electricity with voltmeter" for lots of possibly good information. Walt
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centrifugal compressor lube oil pump

nishanthreddy33 ·
in my plant one of the centrifugal compressor having lube oil pump which is backpulled out type.recently i observed continous vibration only pump drive and nondrive around 15gE and 27gE values and velocity was below 2mm/s envlope.i think there may be flow issue problem.let me know how to analyze these type of issues.u can see the spectrum. thanks in advance.
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Re: centrifugal compressor lube oil pump

GLSands ·
I may be wrong, but what I see is a 1XRPM that is not reflecting an Unbalance. Rather the 1XRPM is an indication of a support bracket becoming loose. This is also causing uncertain fluctuation of the Enveloping Signature and flow. Check for looseness with Strobe or touch. Hope this helps.
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Re: centrifugal compressor lube oil pump

narayan ·
Have you collected data at Vertical and axial direction on NDE and DE. It does not seems to be a flow related issue based on the spectral data. What about the process parameters- is there any differential pressure indication across the suction strainer. Is this a long term issue or happened after any shutdown/maintenance
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Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Reliable Analyst ·
Vertical type Mixed flow centrifugal pump, rpm 750, 6.6KV electrical induction motor, pump shaft length 10M, Working media is sea water intake, Pump sealing is through gland packing, Coupling type is rigid, Motor DE bearing is anti friction grease lubricated and NDE has runner (sleeve with a collar) and has radial pads & axial thrust pads the whole assembly of NDE is in an oil sump. Almost 2M shaft is above ground whereas 10M pmp shaft is below underground. Pump has water lubricated...
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Akhil Rathore ·
thats good similar case was witnessed by me where a 2MW motor with sleeve bearings was showing the same behavior.
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Akhil Rathore ·
vibration coupled with commonsense is highly effective...
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

PKS ·
Nicely analysed the root cause but how many days it took to resolve the subject issue.
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Panta ·
Hello everyone , I might unintentionally misuse this post but your opinion would help me These days we also have a problem with high vibration at one electric motor, which strongly depends on the temperature of the bearings. The vibrations in the radial direction are 4 mm sec in the cold state and increase to 10 mm sec when temperature of the oil and bearings reaches 70 degrees C. FFT diagram only shows the first harmonic of speed which indicates potential imbalance of the rotor but motor...
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Reliable Analyst ·
@PKS It took about 03 months @Dan the waveform was W shaped as it always is in case of rocking motion. Only difference was in amplitudes
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Re: Vibration Vs Ambient Temp (Can vibration analysis diagnose?)

Dan Timberlake ·
I assume your measurements are housing measurements. Got any time wave forms from when the motor was running OK with thin cool oil and badly with hot thin oil? Maybe Those with experience with prox probes could comment on what those might have shown on the NDE in that situation.
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Re: Steam Turbine Hydrauluc Oil Problem

Shurafa ·
ISO /NAS are very very high if your turbine has a hydraulic control system. I would replace the main oil filter elements (and maybe the oil conditioner) regardless of the running diff pressure or their appearant condition. Also I would ask for a lab test to identify the contaminants and based on that I'll trace the source. Any water contents? Regards- Ali M. Al-Shurafa
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Steam Turbine Hydrauluc Oil Problem

JosephLee ·
Hi everyone, Can you say a word after reading these oil analysis report. Contamination: 72 ISO 4/6/14: 23/21/14 NAS 1638: 12 Chemistry: 29 DV Viscousity % Change: 31 Varnish Number : 33 RULer: 52 Any suggestions. Parameters are very much beyond the limits. Oil conditioner is continuously installed for conditioning.
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Re: Steam Turbine Hydrauluc Oil Problem

JosephLee ·
No water contents. Contamination and viscosity is our in house analysis report and Varnish is from 3rd party analysis report. 3rd Party results are attached. Oil conditioner replacement is a costly exercise.
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Re: Steam Turbine Hydrauluc Oil Problem

JosephLee ·
Filter elements never chocked in history. Lube oil is different. See Lube oil report attached.
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Re: Steam Turbine Hydrauluc Oil Problem

Shurafa ·
I'm not sure but the report shows very high water content (926 ppm). Is the oil used also to lubricate the turbine's bearing? Look at the system on the site to find a low drain point. You may remove a large deal of the water by draining the accomulated water from low points. In my previous post, i suggested to replace the filter elements not the conditioner as a whole. Regards- Ali M. Al-Shurafa
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PASSING VALVE INSPECTION IN OIL & GAS

dominich.vo ·
Hi all, I am finding a solution to check the passing valve (leakage) on refineries. Refer to this post on http://www.ipieca.org/energyefficiency/solutions/60391 , There a 3 methods : 1 . Acoustic emission 2. infrared camera 3. Ultrasound stethoscope: --> Method 1 - AE - is frequently applied , and very common in oil & gas. Infrared camera and ultrasound structure born are just supplement methods. I was confused about that: In ultrasound applications, it is also mentioned to valve...
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Re: PASSING VALVE INSPECTION IN OIL & GAS

ivibr8 ·
I think much depends on the type of valves you are looking into. Some discussion of valve leakage can be found in https://www.maintenance.org/top...-of-hydraulic-valves In this thread, Walt discusses having success on hydraulic unloading valves. I performed some testing years ago on the performance of an acoustic valve leak detector. The theory (as it was then; perhaps some new methodologies now exist?) was to compare the vibration between upstream and/or downstream valve locations to a...
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Re: Steam Turbine Hydrauluc Oil Problem

rgf12 ·
A little background please-what is the specific oil type-MFG/ISO Grade? Age of oil? Duty cycle? Is this a peaking or baseload unit? The reason I ask is that different lubricants used as hydraulic fluid in turbines have different acceptance criteria and different mitigating actions.
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trafo oil

raymundus ·
I wanna know about the way to know about oil quality in trafo. is it in PdM region ? and may be some one want to share about SST radiator replacement
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Re: trafo oil

rgf12 ·
What are you talking about here? Is this a transformer? When you post a question please include all the information you have-a detailed description of the equipment in question, model number, oil type and quantity, age etc. You can get a good deal of help and advice here but you need to provide some details on what you need or most readers will ignore your postings.
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