Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
(OP)
Hello All,
Does anyone have any success with running a certain type of buffer fluid on a Plan 52 (unpressurized tandem seal) @ -215 F? We are running liquid and liquid lower as of now. Yes I know we should be running a gas seal somewhere....we're working on that.
The process fluid is Methane @ -215F. We are currently using Royal Purple GT22 buffer fluid, but its rating isn't near what we need. I think that the buffer fluid is sufficient at run time, but the start up is what has me worried.
On start up our seal pot immediately freezes up and after a few mins its calms back down to normal temperature. This is what usually happens, but sometimes the seal pot never thaws out. I think the buffer fluid is freezing around and between the primary seal faces on cool down and causing face gap. This is allows process to leak by into the seal pot or simply damage the faces on startup.
So again...
Does anyone have any success in running a buffer fluid @ -215 F? If so, what type and what brand?
Thanks!
Does anyone have any success with running a certain type of buffer fluid on a Plan 52 (unpressurized tandem seal) @ -215 F? We are running liquid and liquid lower as of now. Yes I know we should be running a gas seal somewhere....we're working on that.
The process fluid is Methane @ -215F. We are currently using Royal Purple GT22 buffer fluid, but its rating isn't near what we need. I think that the buffer fluid is sufficient at run time, but the start up is what has me worried.
On start up our seal pot immediately freezes up and after a few mins its calms back down to normal temperature. This is what usually happens, but sometimes the seal pot never thaws out. I think the buffer fluid is freezing around and between the primary seal faces on cool down and causing face gap. This is allows process to leak by into the seal pot or simply damage the faces on startup.
So again...
Does anyone have any success in running a buffer fluid @ -215 F? If so, what type and what brand?
Thanks!





RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
Johnny Pellin
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
I'm not sure about that 50/50 mixture, but my initial thought is that it would freeze. I'll look into it. As of now gas seals sound like a must!
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
I don't know anything about the Royal Purple product you're using. You should check that your buffer fluid has a cloud point or at least a waxing point below -260°F, or whatever your bubble point temperature is at 0 psig.
Sorry, I don't have the answer on what buffer fluid to use.
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
I have been maintenance plan 52 seal type running for C1 product with themprature about -45 deg C, we are using shelll tellus morlina 10, as long as there are no liquid leakage from your seal i believe your seal will never freeze were freeze indicated liquid passing to atmosphere.
RE: Buffer Fluid for -215 F Process (Plan 52 Seal Arrangement)
I would also contact your seal vendor for a more detailed approach.