What seal plan is used for hot service residue pumps
What seal plan is used for hot service residue pumps
(OP)
Dears,
we are facing frequent seal failures in our hot service pumps. Their plans are 53B, 21
we observed coking in the barrier fluid so we have replaced it with another oil with higher flash point.
with regards to plan 21, we observed chocking in the lines even when the cooler is isolated.
my questions are bellow,
1-Do I expect the product to be chocked in the stuffing box and on the bellow? I think the liquid is hotter in the stuffing box than in the flush pipe and i don't think this is contributing to the failure?
2- Assuming the stuffing box temp is high since it is in hot standby. can remove plan 21 and only keep 53B with better quality oil?
The flush is used to cool down the seal, = alternative: I will use a heat transfer barrier that will cool down the primery faces. stuffing box will contain hot liquid so it will not be congealed
the products is crude residues with temperature of 350C
I thought of using plan 21M (flush from common discharge) in this case can I introduce the product to the cooler before it goes to the seal?
what are the risks associated with this plan?
Thanks
we are facing frequent seal failures in our hot service pumps. Their plans are 53B, 21
we observed coking in the barrier fluid so we have replaced it with another oil with higher flash point.
with regards to plan 21, we observed chocking in the lines even when the cooler is isolated.
my questions are bellow,
1-Do I expect the product to be chocked in the stuffing box and on the bellow? I think the liquid is hotter in the stuffing box than in the flush pipe and i don't think this is contributing to the failure?
2- Assuming the stuffing box temp is high since it is in hot standby. can remove plan 21 and only keep 53B with better quality oil?
The flush is used to cool down the seal, = alternative: I will use a heat transfer barrier that will cool down the primery faces. stuffing box will contain hot liquid so it will not be congealed
the products is crude residues with temperature of 350C
I thought of using plan 21M (flush from common discharge) in this case can I introduce the product to the cooler before it goes to the seal?
what are the risks associated with this plan?
Thanks





RE: What seal plan is used for hot service residue pumps
Johnny Pellin
RE: What seal plan is used for hot service residue pumps
Plan 21M is 32 basically. 21M is taking the flush from the common discharge.
RE: What seal plan is used for hot service residue pumps
I am not sure if I would agree that a Plan 21M is basically the same as a Plan 32. Our Plan 32 flush comes from downstream after the gas oil has been filtered and cooled. How do you cool the Plan 21M? A water cooler would lime up. An air-fin cooler would generally not provide as much heat removal.
Johnny Pellin