Hot standby for pump
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Hello, experts. I’m facing a tricky issue related to the thermal backup of the pump. For large pumps, there are usually two lines for thermal backup: one upper thermal backup line and one lower one. The normal operating temperature of the pump’s medium is 259°C; when the thermal backup temperature becomes too high, the pump shaft doesn’t rotate, or it only rotates slightly； When the pump’s standby temperature is 34 degrees, it’s roughly possible to operate it. What’s the reason for this? Also, what should be the appropriate temperature for a high-temperature pump in standby mode?
The uneven hot standby is caused by inconsistent expansion
The answer is above; it is recommended to increase the frequency of cranking.
259 degrees Celsius. Is A8 material being used? If so, it is necessary to consider the shaft material and the clearance between the ring components. Here are two suggestions: 1. Do not use 316 stainless steel for the shaft, as it tends to deform easily. 2. The orifice plate of the heat pump needs to be adjusted properly to ensure proper flow control of the heat pump. 3. Readjust the ring component surrounding the impeller. 4. For the operation of the heat pump, the skill level of the workers is also an important factor that needs to be taken into account. These are some personal opinions; P;P
Requirements for heat pumps in pump factories – 2 degrees per hour of temperature rise℃