In our wet Gas compressor we experience frequent seal oil migration/leak into lube oil. Wet seals exhibit low MTBF. How can we eliminate seal leak and enhance sealing performance? Is dry gas seal a reliable solution in wet gas compressor?
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19/12/2015
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K V PRASAD RAKOTI, INDIANOIL, rkvprasad@yahoo.com
Dry Gas Seals give reliable solution after effective installation.
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10/09/2015
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keith bowers, B and B Consulting, kebowers47@gmail.com
Dry gas seals provide excellent life and service WHEN PROPERLY installed with DRY, CLEAN gas supply. Design and fabrication of the seal gas conditioning system is best left to the seal manufacturer because there ARE many details that must be 'right.' This is no place to go 'low cost.'The piping and valves controlling the seal gas to each seal MUST be PROPERLY designed and installed also, These details are absolutely necessary for reliable service. MOST 'dry gas seal' failures are caused by liquids or particulates in the seal gas. Installations with proper seal gas conditioning usually run DECADES without any problems.
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12/08/2015
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Lindsay McRae, Pall Corporation, Lindsay_McRae@pall.com
You may need to upgrade or replace the filter used on the seal fluid. Typically 3um to 10um filter is recommended on seal fluid to protect seals. What type of filter is currently used to filter your seal fluid to protect the mechanical seals?
Dry seals can also be used. I am not a mechanical seal expert so consult with your seal supplier or compressor vendor for further information.
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05/08/2015
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Bruce Carr, Suncor Inc, matukaze1@hotmail.com
Without a drawing of your existing seal system it would be impossible to troubleshoot. However in answer to your question on dry gas seals.... If the compressor operating pressure is below 150# yes you can sucessfully change over to a dry gas system but be sure to go for a Circpac system... both Kaydon and Flowserve offer almost identical replacements for existing wet seal systems. The MTBF is better than wet seal systems.
Stay clear of a face to face dry gas system (similar to a pump Plan 74)... Any axial movement will damage then... a surge can cause a catastrophic failure.... Axial movement has no effect on Circpacs they can even handle a surge. In my opinion Kaydon is the better of the two but the Flowserve is cheaper... They both require a steady N2 supply and a control panel but N2 usage is minimal.
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