Can we use self prime pump to replace vertical line shaft for vacuum a
Can we use self prime pump to replace vertical line shaft for vacuum a
(OP)
Hello:
I have a problem in a small steam power generation unit where I have a vertical shaft pump in a close vessel under vacuum. the pump of course has a mechanical seal. It is pumping condensate water at 80 Deg C. The flow is only 5 m3/hr. It is keep failing in the bushing area and I am thinking to replace it with a horizontal self prime pump, but since it is a vacuum at 0.48 kg abs, I am not sure where it will be a good idea.
We tried many think to resolve this issue but unfortunately not succeeded.
I would appreciate any advice.
Regards
I have a problem in a small steam power generation unit where I have a vertical shaft pump in a close vessel under vacuum. the pump of course has a mechanical seal. It is pumping condensate water at 80 Deg C. The flow is only 5 m3/hr. It is keep failing in the bushing area and I am thinking to replace it with a horizontal self prime pump, but since it is a vacuum at 0.48 kg abs, I am not sure where it will be a good idea.
We tried many think to resolve this issue but unfortunately not succeeded.
I would appreciate any advice.
Regards





RE: Can we use self prime pump to replace vertical line shaft for vacuum a
Many times in the application that you are describing, the tank is elevated above the pump. Is that arrangement possible?
RE: Can we use self prime pump to replace vertical line shaft for vacuum a
Water at 80 C is very poor lubrication property.
If the failing bushing is at the seal area, you need to have a
Plan 21 or 23 flush plan.
If there are intermediate bushing,you need to look into the material of the bushing.
RE: Can we use self prime pump to replace vertical line shaft for vacuum a
Johnny Pellin
RE: Can we use self prime pump to replace vertical line shaft for vacuum a
In fact we have a place underneath the suction vessel to install a pump. I am thinking to have canned motor pump with external cold flushing so we can fully protect the vacuum system. The service is clean whcih is BFW quality. Any comment on this?
RE: Can we use self prime pump to replace vertical line shaft for vacuum a
seals, not packing. The mechanical seal eliminates most of the
leakage and evaporation at the stuffing boxes. The mechanical seals must be designed for the maximum temperature encountered with the hot condensate.
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