Mechanical seal for a molten sulphur application.
Mechanical seal for a molten sulphur application.
(OP)
Hi all,
i am right now working on a mechanical seal for molten sulphur application.
what is the best seal and environment you would recommend?
i am thinking of a rotating metal bellow seal with steam heated seat. Pump has jacketed stuffing box , so steam can be circulated continuously.
Has anyone experienced with pusher seal ? please suggest your views.
Thanks, Ramesh babu
i am right now working on a mechanical seal for molten sulphur application.
what is the best seal and environment you would recommend?
i am thinking of a rotating metal bellow seal with steam heated seat. Pump has jacketed stuffing box , so steam can be circulated continuously.
Has anyone experienced with pusher seal ? please suggest your views.
Thanks, Ramesh babu





RE: Mechanical seal for a molten sulphur application.
RE: Mechanical seal for a molten sulphur application.
using metal below seal is quite good idea, but it will cost 4 times than the other selection. we have provided mechanical seals in sulphur where only the seal faces comming in contact with the media the rest of the seal parts (spring etc.) completely isolated from the pumping media.
these seals are of burgmann HR series double mechanical seals type with steam circulation in stuff box & in the seal chamber externally
sic/sic(IB)/Carbon/TC(OB) will be better, we have experienced good results using this types.
bye
siddik
siddik
RE: Mechanical seal for a molten sulphur application.
I'm not so sure that the cost factor mentioned above applies. I'd suggest contacting your vendor for a better idea.
Sulfur has be be above something like 260 F to stay molten...
There are some pumps like those made by Lewis where the stuffing box will see little to no product during operation. In those kinds of pumps you could also choose to use a kind of restriction device like a pair of segmented bushings purged by plant N2.
RE: Mechanical seal for a molten sulphur application.
A Burgmann HR can be used as stated in the thread but a double seal is not be required in my opinion.
I'm thinking adding a plan 11/13 may not do much in the way off cooling as the temps will be high thru out the system so you may be able to go dead ended.
Either that or you could remove heat from the box you are trying to put in with the heated box.
Antimony Filled (Carbon for Strength) v SiC Faces.
HTH
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Milkboy
RE: Mechanical seal for a molten sulphur application.
I would recommend a pusher with Tungsten Carbide faces with either an integral heating jacket in the seal gland plate or as part of the pump. Also be careful in getting sulphur too hot as the viscosity inreases and again can lead to problems if you use bellows.
Steam quench is a good idea however you will need a fair amount of superheat to keep it hot (from memory anyway)