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Plan 53A barrier Makeup Fluid
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Source：Internet Author：Unknow Pubdate：2010-06-29
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HoustonMechEngr (Mechanical)
9 Jun 10 15:02
What is the ideal procedure to add barrier fluid to a plan 53A seal reservoir? If the system is pressurized under a nitrogen blanket, how do you go about adding barrier fluid if the leak is at an extremely low rate and you need to add makeup fluid?
I've heard about re-fill carts, but are they able to pump up against the nitrogen pressure? I would htink you would NEVER want to de-pressurize the system as you can see ao-ring shift on the primary seal and possibly never reseat. Thoughts?
CH5OH (Petroleum)
9 Jun 10 15:56
common practice would be to use a handpump (much like a pump used to operate hydraulic tools
flexibox (Mechanical)
14 Jun 10 23:07
Be careful using hand pumps. If you have pressure above 1000Kpa using hand pumps is not so easy if you want to top up say 6ltrs. what happens is that operators start to ignore top ups or depressurize the Plan 53A system to make it easy. 字串2
The other option is an air driven piston pump which uses air to drive it and no effort by the operator. Costs are higher but if you save 1 seal failure it's paid for itself
trust this helps
HoustonMechEngr (Mechanical)
16 Jun 10 16:17
flexibox,
Thanks for the response. You would agree however, that the pressure off the plan 53A should never be relieved when adding "makeup" barrier fluid? This would place your seal in a "reverse pressure" situation and o-ring shift could possible manifest itself hanging-up when the correct pressure orientation is re-established.
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