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30 Cards in this Set
- Front
- Back
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Oil molecule path |
Sump -> pump -> relief from unloading valve -> duplex filters -> cooler -> losca -> thrust bearing -> MRG-> gravity drain back to sump |
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How big is MER 1 lube oil sump? Low alarm? Normal level? |
2486 gallons Low: 1400 gallons Normal: 1750 |
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How big is MER 2 lube oil sump?low level? Normal? |
2287 gallons Low: 1381 Normal: 1726 |
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What are the electric pumps rated at? |
318 gpm slow 560 gpm fast @105 psi Relief valve at 125 psi |
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What do the electric lube oil pumps do? |
Assist attached pump when at slower speeds 2 of them |
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What is the attached pump rated at? |
693 gpm @75 psi @168 shaft rpm |
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What are lube oil pump logics? |
High lube oil alarm: 18psi Normal: 14psi Lead pump to low: 13 psi Lead pump to fast: 11.5 psi Stby pump to fast: 10pm I Low lube oil alarm: 8 psi |
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What does the unloader valve do? |
Maintains lube oil system pressure at 14.5 psi |
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At what pressure is the low lube oil pressure alarm at? |
Low pressure alarms at 8psi |
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What position does the unloader valve fail at? |
In the closed position for maximum lube oil |
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Where is the unloader valve sensor? |
After the filter/coalescers |
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Where does the unloader valve unload? |
After the pumps before the duplex filters then returns to sump |
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What is the duplex filter high DP? |
12 psid Change out filter when this happens |
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What is the lube oil cooler? How operated? |
Controls temperature of lube oil Controlled by LP air |
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What position does the lube oil cooler temp reg valve fail in? |
Open. To allow for maximum cooling. |
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What type of cooler is it? |
Shell and tube |
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What cools lube oil? |
Seawater |
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What is the high temp for lube oil? |
130 |
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What is the low temp for lube oil? |
90 |
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What is the normal operating temp for lube oil? |
115 +/- 5 |
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What does LOSCA stand for? |
Lube Oil Storage and Cooling Assembly |
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What cools 23699? |
2190 |
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In the shell and tube assembly, what is higher pressure? |
23699 so 2190 does does not contaminate 23699 if a rupture occurs |
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How often do you conduct a mineral oil contamination test? |
Monthly for 23699 |
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What kind of oil is used in the gas turbine lube oil system? |
Synthetic 23699 cooled by 2190 |
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What cools the thrust bearing? |
2190 |
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What is the lube oil purifier rated at? |
500 gph With 15-18 psi back pressure |
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What are two ways to purify a system? |
Batch and Continuous |
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What Is batch purification? |
Storage; to settling (heated to 160) for 24 hours, sediment falls to the bottom of the sump (drip pan) Example: sump heaters |
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What is continuous purification? |
Take it, clean it, put it back |
