The organic pump does not rotate when it is at a stop state
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Today, it’s impossible to turn the fresh alkali solution pump (the low-flow pump) by hand. It used to be easy to do so, but now we are in a shutdown mode. I would appreciate it if the experts here could explain the reason for this. Thank you
Regarding this issue, first of all, you need to truly focus on the maintenance of the equipment during the periods when work is not being carried out – is maintenance done at regular intervals and in a systematic manner (such as regular rotation of the equipment, replacement of engine oil, etc.)?； The second point is whether the equipment has not been in use for a long time, resulting in severe rusting inside and thus causing problems.
It might have rusted; try using pipe wrenches. It’s best to coil it every three days when the vehicle is parked
To add, could it be that during the shutdown for cleaning, debris and rust accumulated in this area, causing the impeller to get stuck? When the reason is unknown, it is not recommended to force the rotor to turn, as this can easily damage the impeller.
Can’t it turn in the opposite direction either? I’m not familiar with your process media. From what I’ve encountered, there are roughly the following possibilities: 1. The medium is prone to solidification, and the heating system isn’t working properly, which prevents the pump from rotating; blowing steam at it for a few minutes will melt the medium and allow the pump to start rotating again. 2. Impurities have passed through the filter and entered the pump casing, causing the impeller to get stuck, so the pump cannot rotate in either direction; in this case, it’s necessary to disassemble the pump for repair. 3. Prolonged lack of rotation has caused the moving parts to rust and stick together; depending on the severity of the issue, the pump can be rotated until it operates smoothly again, or it must be disassembled for inspection.
The alkali solution has crystallized, and the impeller and bearings are stuck together; do not try to rotate the shaft. Flush it with water or steam to liquefy the alkali before attempting to rotate the shaft. The alkali pump must be rotated manually at the end of each shift; if it is not used for a long time, it will seize up.
The opposite direction is also heavy and noisy; the medium is an alkaline solution with strong corrosiveness
I agree with the idea that crystallization occurs; over time, the alkaline solution will crystallize and get stuck in the impeller, preventing the machine from rotating. However, even when the equipment is shut down, it should still be rotated regularly to avoid similar problems if no action is taken.
I’ve been looking at it for a while; it seems that there are indeed experts who have something to say! Crystallization due to alkali solution – just heat it and add water for a while, and it will be fine!
Temperature changes cause the alkali to precipitate and crystallize; on one occasion the crystallization was so severe that acid washing was the only option.
When the rotating equipment is shut down, it is necessary to turn it manually at the end of each shift to ensure it remains in a proper standby condition. For alkali solution pumps, the most likely cause is crystallization of the alkali solution; simply flushing it continuously with water or blowing it with steam for a while will do