How to prevent freezing of the seal pipeline of the standby centrifugal pump?
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How to ensure that the material seal flushing pipeline Plan21 of the standby centrifugal pump in the unit remains unblocked due to freezing in winter?
Depending on the actual circumstances, devices that are not of Category A can opt for the evacuation method； If it is not a Class A device and the medium is water or some harmless, non-condensable, non-corrosive substance, the continuous flow method can be chosen. For Class A equipment, the external heating method is selected ；
What is the medium, what is the temperature, and is it a pump that is in regular use or one that is not in use?
The sealing water should be in use on a long-term basis, or the sealing flush water pipeline should be equipped with heating (the heating should be turned off during summer or when temperatures are high).
Water can flow, but it seems there’s no good solution for the material in the flushing pipe; at best, heating and insulation can be applied