The hot water circulation pump is a kind of centrifugal pump. The use temperature is within 120 °C. It can be installed vertically and horizontally. The hot water circulation pump mainly has the following faults: no water, insufficient flow, noise vibration, water leakage. Wenzhou Zhongnai Pump Valve Co., Ltd. introduces the fault analysis of hot water circulation pump to you.
First, the hot water circulation pump does not produce water reasons and troubleshooting methods 1, the hot water pump inlet and outlet valves are not open, the access pipe is blocked, the abortion impeller blocked. The solution is to remove the blockage.
2. The water supply for import and export is insufficient, the suction stroke is too high, and the bottom valve leaks. Shutdown inspection and adjustment (this phenomenon is easy to occur when the grid is connected to the water pipe and the suction pipe is used).
3. The pump is not filled with liquid and there is air in the pump chamber. Open the top cover of the pump or open the exhaust valve to drain the air.
4. The hot water circulation pump suction pipe leaks. Tighten each sealing surface to remove air.
5. The motor runs in the wrong direction, and the motor phase loss is very slow. Adjust the motor direction and tighten the motor wiring.
6, the pipeline resistance is too large, the centrifugal pump is not properly selected. Reduce pipe bends and re-select the pump.
Second, the hot water circulation pump flow is insufficient due to the elimination method 1, the hot water circulation pump inlet and outlet valves are not opened, the access pipe is blocked, the abortion impeller is blocked. The solution is to remove the blockage.
2. The impeller of the pipeline and hot water circulation pump is partially blocked, scale deposit and valve opening are insufficient. Remove obstructions and readjust the valve opening.
3 Exceed the rated flow rate, adjust the flow to close the small outlet valve.
4. The impeller wears and the impeller is replaced.
5, the centrifugal pump voltage is low, voltage regulation.
6, the pump bearing wear, replace the bearing.
7. The centrifugal pump has a high suction stroke and reduces the suction stroke.
Third, the hot water circulation pump noise, vibration causes and troubleshooting methods 1, the liquid mixed with gas, improve the suction pressure exhaust.
2, generate cavitation, reduce the degree of vacuum.
3. The pipeline support is unstable and the pipeline is stable.
4, the bearing is damaged, replace the bearing.
5, the motor overloaded heat operation, adjust the flow to close the small outlet valve.
Fourth, hot water circulation pump fault leakage reasons and troubleshooting methods 1, the pump body has sand holes or rupture, welding repair or replacement.
2. The mechanical seal of the hot water circulation pump is worn and replaced.
3. The mounting bolts are loose and tight.
4. The sealing surface is not smooth and trimmed.
Five, hot water circulation pump motor heating reasons and troubleshooting methods 1, hot water circulation pump flow is too large, overload operation, close small outlet valve.
2. The hot water circulation pump motor bearing is damaged and the bearing is replaced.
3, the voltage is insufficient, voltage regulation.
4, touch rub, check and exclude.
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