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Level 1 - 1 to 50 posts
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If the nas value of oil is 11 then what can we infer?

kindly suggest


shubrajit
 
Posts: 21 | Location: india | Registered: Wed November 16 2011Reply With QuoteReport This Post
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1. Depend on your application
2. Depend on the details of NAS result
this NAS 11 is for the small particles or big particles

for me, I prefer to use ISO Cleanliness Class
 
Posts: 122 | Location: Jakarta - Indonesia and/or Jubail - Saudi | Registered: Mon December 08 2008Reply With QuoteReport This Post
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Shubrajit,

As Nurudin comments, that depends on your application, but I could say that NAS = 11 means high content of particles.

What is your application? What does recommend the OEM?

NAS = 11, is like ISO 20/17.

Regards,
 
Posts: 76 | Location: Argentina | Registered: Thu October 14 2004Reply With QuoteReport This Post
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dear schmid

thanks for your lind reply. well the application is vertical roller mill's roller bearing oil


shubrajit
 
Posts: 21 | Location: india | Registered: Wed November 16 2011Reply With QuoteReport This Post
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Dear Shubrajit,

You should review the OEM recommendation about NAS Code, but I think that NAS = 11 is too high for this application.

In order to improve this NAS value, you can take different actions as:

1- Install a kidney-loop filtration skid. Of course, we would need the quantity of oil in the system.

2- Improve the efficiency of the filter elements of the systems. What is Beta Ratio of the filter elements?

3- Install breathers, or seals, in order to avoid the particle ingression.

If you send to me an email to schmidmend@hotmail.com with more data, I will be able to help you. I would need to know:

1- Type of oil, and quantity in the entire system.

2- Type of lubrication system (forced system?).

3- Type of filter element used (brand, beta ratio, P/N).

4- Pictures

Thanks a lot,
Cristian Schmid
 
Posts: 76 | Location: Argentina | Registered: Thu October 14 2004Reply With QuoteReport This Post
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