First, the centrifugal pump to stop running after the request
1, centrifugal pump should stop running after the pump population valve, to be cooled and then turn off the auxiliary system valves.
2, high-temperature pump parking should be implemented according to the provisions of technical documents, after parking should be 20-30 min each turn a half circle until the pump body temperature dropped to 50 ℃ so far.
3, cryogenic pump parking, when no special requirements, the pump should always be filled with liquid; suction valve and the discharge valve should be kept normally open state; using double-ended mechanical seal cryogenic pump, liquid level controller and pump seal chamber seal Fluid should maintain pump grouting pressure.
4, conveying easy to crystallize, easy to coagulate, easy precipitation and other media pump, stop the pump to prevent clogging, and timely flush with water or other media pumps and pipes.
5, discharge the liquid stored in the pump to prevent corrosion and cracking.
Second, the centrifugal pump mechanical seal static ring face failure of the cause analysis
Centrifugal mechanical seal static ring end face crack common failure phenomenon, but also the most sealing parts failure one of the parts, then when these phenomena appear, the reason is where?
1, the installation of the sealing surface clearance is too large, too late to take away the rinse liquid generated by friction heat; rinse liquid leak from the gap in the sealing surface, resulting in overheating and damage.
2, the liquid medium vaporization expansion, so that the two ends by the expansion of the vaporization and separation, when the two sealing surface force fit, the destruction of the lubricating film resulting in the end surface overheating.
3, poor lubrication of liquid medium, combined with the operating pressure overload, the two sealing surface tracking rotation is not synchronized. For example, high speed pump speed of 20445r / min, sealing surface center diameter of 175px, the pump speed after the line up to 75m / s, when there is a sealing surface can not track the rotation delay, instantaneous sealing surface damage caused by high temperature.
4, seal flushing fluid orifice or filter blockage, resulting in insufficient water, so that machine seal failure.
Generator with Perkins,Power Generation,Silent Generator
Perkins Generator Co., Ltd. , http://www.nsgenerator.com
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