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Thread: Re: Sabroe SMC 108LL MK4
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26-04-2021, 09:30 AM #1
Re: Sabroe SMC 108LL MK4
Hi every one
i have SMC 108LL MK4 compressor oil temp. always high about 79.5 C .oil cooling by water about 25 C and oil pressure is 5.3 bar but oil filter diff. is 2.5 bar is that high need to change oil filter? and what the reasons of high oil temp.?
thanksLast edited by dolce; 26-04-2021 at 09:41 AM.
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26-04-2021, 02:35 PM #2
Re: Sabroe SMC 108LL MK4
Cracked ring plate.
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26-04-2021, 05:47 PM #3
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26-04-2021, 09:18 PM #4
Re: Sabroe SMC 108LL MK4
What are the operating conditions? Discharge pressure and temperature? and suction pressure?
Oil temp should be around 10K above saturation temperature of high stage.
Oil pressure Should be between 4,5 and 5 bars, Filter diff is also high, replace filter.
What are the return temp of cooling water? Have check the oil sump cooling jacket top to see if it dirty?
If you close the suction valve when the compressor is stopped, does pressure equalize to discharge pressure on suction?
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26-04-2021, 09:27 PM #5
Re: Sabroe SMC 108LL MK4
dolce,
Maximum oil temperature is 80 deg C
Oil filter differential is 4 bar alarm, 6 bar trip.
You need to service compressor, check/change all valve plates & springs, as something may be broken.
Clean water jackets, change oil filter, clean compressor crankcase.
When was it serviced last & what was done?
Only use genuine parts if you want reliable compressor.
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16-08-2021, 02:13 PM #6
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Re: Sabroe SMC 108LL MK4
Hi Renger
Sound is not right to me .
4 bar for alarm and 6 bar for trips.
Our (different )oil pressure is 4 .
I do adjust alarm before and after oil filter 0.8 up to 1 bar . And trip 1.2 bar.
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16-08-2021, 08:54 PM #7
Re: Sabroe SMC 108LL MK4
mbc,
I think correct.
Oil pressure meant to be set at 4.5 bar, alarm 4 bar, trip 3.5 bar
Oil filter differential alarm 4 bar, trip 6 bar as is on discharge of pump before oil pressure regulator.
I guess at end of day you will not get enough oil pressure.
I will send information to you.
Assume Sabroe is correct, but could be a misprint!
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17-08-2021, 03:59 PM #8
Re: Sabroe SMC 108LL MK4
Oil pressure max.6/5.5 min.4/3.5
Oil temperature mx.80/75 min.45/40 C
Oil filter max 6/4 bar
Discharge pipe max.150 C
This is factory settings.
You must open and overhaul compressor because there is big problem inside.
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18-08-2021, 05:04 AM #9
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Re: Sabroe SMC 108LL MK4
Hi
Differential 4 for oil pressure is too high
Normally our oil pressure for SMC Type is 4
Up to 4.5
So I think 1 for alarm and 1.5 for trips is a best chose .
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18-08-2021, 05:40 AM #10
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18-08-2021, 07:48 PM #11
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Re: Sabroe SMC 108LL MK4
Hi Renger
1.5 for max. drop pressure in oil filter
Ofcourse Min. Pressure after oil filter should more than 3.5Last edited by mbc; 18-08-2021 at 07:51 PM.
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20-08-2021, 04:08 PM #12
Re: Sabroe SMC 108LL MK4
MBC I follow instruction from Sabroe.
Some serious guys in factory made this compressor.
Technical service guys like us can make some suggestion but we can not be smarter then factory.
At the end I always put factory settings(oil filter) and oil filter clogged , just change it and unit running perfect.
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20-08-2021, 05:44 PM #13
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Re: Sabroe SMC 108LL MK4
Hi AKI
Look our oil pressure (different pressure between pressure of oil gage and suction pressure gauge pressure) normally is between 3.8 up to 4.3 .
So how the our drop pressure in our oil filter can be 3.5 or more .
The Max. Drop pressure in all filter should not be more than 1 bar in all type of compressors.