Issues with the seal cooling water in centrifugal pumps
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Our company has many centrifugal pumps used for transporting liquid materials, with the temperature of these materials being below 80°C. The model numbers are IH-65-40-200A, IH-100-80-160, and IH-50-32-160. DIW is used as the cooling water for these seal units; the temperature of the DIW output water is around 15°C at present, with a maximum of 35°C in summer. So what is the minimum flow rate of cooling water for this mechanical seal? Because we are operating 24/7 at the moment, which is very wasteful; however, there isn’t a good solution, so we can only try to reduce the flow rate to see if that can help save some energy. The higher flow rates are 400–500 L/h, while the lower ones are 90 L/h
The flow rate of the mechanical seal cooling water depends on your operating conditions and the heat load of the pump. Since the temperature of the liquid feed is below 80°C and the temperature of the cooling water is at most 35°C, it is possible to try reducing the flow rate gradually while monitoring the pump’s temperature and sealing performance. If the pump is operating properly, with no overheating or leakage issues, then the flow rate can be maintained at a low level. The specific value of the flow rate needs to be adjusted according to actual conditions; it can start at 90 L/h and then be reduced gradually while monitoring the pump’s performance. If there are problems, it is necessary to increase the traffic. It is also possible to consider installing a temperature control system to automatically adjust the cooling water flow according to actual needs. .
500 L/h is not necessarily large, and 90 L/h is not necessarily small; it depends on the specific operating conditions. The manufacturer of the main unit tends to specify a higher flow rate. Please provide the operating conditions to the manufacturer of the mechanical seal, and ask them to specify the requirements regarding cooling water flow rate, pressure, and temperature
When the mechanical seal is in operation, friction between the rotating ring and the stationary ring generates heat, which needs to be cooled. In some cases, the medium water from the pump itself is used for cooling; in other cases, a separate pipeline must be installed to supply water to the mechanical seal, and the water used for cooling it is known as seal water.
Very professional! ! ! The best approach is to control the flow rate of the cooling water by adjusting the pump temperature, as this results in a more linear relationship
Why is cooling water used? Is it PLAN62? Just replace the mechanical seal
The scheme of using a temperature control system to regulate flow is excellent