MORGOIL FILTRATION REQUIREMENTS

LOMBARAL,
From you post it is unclear what is the viscosity of your oil and for which application is used (Morgol in their application recommend oils from ISO 32 to ISO 1000). Also, what sizes represent your ISO 4406 code? Is it 5, 15 micron or something else? In any case, cleaner oil would definitely have better demulsibility, and less tendency to foam and entrained air, as every particle in oil serve as a seed for forming foam and air entrainment. Properly sized off-line low-flow 3-micron cellulose fiber filter, such as Danish CCJensen or German Hydac) would have no problem achieving and maintaining even better that ISO code you mentioned.

We are having Laser Particle Counter and Off Line Filtration system to filter the oil and also test the oil cleanliness level at the same time. We can program this system to clean the oil up to the required level and no sooner oil cleanliness level is achieved, the entire system stops and a print out report is produced by Laser Particle Counter indicationg oil cleanliness level before and after filtration. We are able to reach the cleanliness level of NAS - 4 ( ISO - 13/10 ) with this equipment ) of 2000 Ltrs. of Oil. Total time taken less then 2 hrs. A copy of such print out report is attached. If you need any more information kindly contact me on zankruti@mtnl.net.in / hymatservices@yahoo.co.in

Regards.

V.S.Dave.

Thank you for your reply.
I've realized that I forgot to mention some important data.The viscosity of the oil is 90 cst at 40°C and volume of the fluid is 20.000 l.The working temperature is about 40°C.Regarding the Iso code I'm referring to the counting of the particle with size > 5um and >15 um.The supplier of the filtration equipment suggests the installation of a reconditioning system with a flow rate of 100l/min and a multi-depth-cartridge filter with a removal rating of B20>5000.

LOMBARAL,
Oil of 90 cSt viscosity (comparable to ISO 100 turbine oils) may have from 150-450 ppm of dissolved water at your operating temperature. It depends on type of oil, where Group 1 oil contains more water than Group 2 oils. Considering this, you should not worry about efficiency of your centrifuge – it work just fine, and dissolved water will not affect your equipment in any detrimental way. The suggested low-flow (approx 26 gpm US) oil reconditioning system sounds like adding Ferrari for your system. Because it is an off-line system, ask them about its dirt holding capacity. It should be at least 7 kg, because you wouldn’t want a system that needs often attention (changing plugged inserts). However, why they suggested Beta Ratio efficiency of 20 microns particles when your focus is on particles between 5 and 15 microns? This make me think that they have 20 micron filters in this system. Maybe a part of this “multi-depth-cartridge” is capable of stopping smaller particles than 20 microns. However, that would be only partial capacity of this filter for this size. In my opinion, you should be looking at 3, or no more than 5 micron filter, which would then take care of particles you want to be targeted. Also, I wouldn’t put too much faith into Beta Ratio numbers, because they are generated in lab with much lighter oil (12 cSt) than what you have, and therefore would not be achieved with your oil at your operating temperature.

Dear Mr. John,
I heard that the electrostatic filtration system gives a cleanliness of up to / more than 0.8 micron rating (that too its limitation will be only after 200cst of viscosity )when made a permanent attachment after the Centrifuge. Could you please tell me whether i am correct or heard wrongly.

Thanks & regards,
SINDHUJAA