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Nitrogen, reducing O2 Levels?


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#1 dianaj

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Posted 03 April 2019 - 01:57 AM

hi everyone im a packaging machine technician for an international snack co.

just need info on nitrogen, been struggling lately to reduce O2 levels to its set point of 1.7%.

even though I increase N2 pressure and flow rates the O2 stay above 2%

does packet size, air fill and bag speed play a role in O2 levels being out of spec



#2 Charles.C

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Posted 03 April 2019 - 02:16 AM

hi everyone im a packaging machine technician for an international snack co.

just need info on nitrogen, been struggling lately to reduce O2 levels to its set point of 1.7%.

even though I increase N2 pressure and flow rates the O2 stay above 2%

does packet size, air fill and bag speed play a role in O2 levels being out of spec

 

Hi Diana,

 

Gauge Problem ? Leak ?

 

Is there a record that previously using the same equipment/product/flow rates the O2 level did reach 1,7% or lower ?


Kind Regards,

 

Charles.C


#3 dianaj

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Posted 04 April 2019 - 01:58 AM

Hey thanks Charles for replying.

 

Yes in the past everything used to be in spec on small packets , in fact I'm running the big bags(200g) now and O2 levels are below 1.7%.

Only when I'm running small bags(25g) lately O2 readings are high.

I've had trial runs on small packets to see if there's a difference on O2 levels (played with packet air fill/speed) no change.

On premises we have a huge silo nitrogen tank.

Nitrogen flow through pipes to pack machines, where we monitor the pressure/flow. On our crisp line we don't experience this problem. Its only on my line and only with the 25g packets.

 

Its really frustrating, because all my product are being put on hold.

 

Need troubleshooting, what else do I look at, any input would be appreciated.

Thanks in advance.



#4 Charles.C

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Posted 04 April 2019 - 02:13 AM

Hey thanks Charles for replying.

 

Yes in the past everything used to be in spec on small packets , in fact I'm running the big bags(200g) now and O2 levels are below 1.7%.

Only when I'm running small bags(25g) lately O2 readings are high.

I've had trial runs on small packets to see if there's a difference on O2 levels (played with packet air fill/speed) no change.

On premises we have a huge silo nitrogen tank.

Nitrogen flow through pipes to pack machines, where we monitor the pressure/flow. On our crisp line we don't experience this problem. Its only on my line and only with the 25g packets.

 

Its really frustrating, because all my product are being put on hold.

 

Need troubleshooting, what else do I look at, any input would be appreciated.

Thanks in advance.

 

 

Hi Diana,

 

Possible random leaks in small bags due to "X" ? (although I would expect that to yield a variety of oxygen levels ).

 

Not my area of expertise but does sound like a flushing problem due to "something" which seemingly has changed compared to a previous configuration.

 

Are same 25g packets currently being run on other lines with no problem ? if so you need to do a detailed comparison.


Kind Regards,

 

Charles.C





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