Causes and Solutions of Hot Water Circulation Pump Hot […]
Causes and Solutions of Hot Water Circulation Pump
Hot water circulation pump is a new generation of energy-saving and environmental protection pipeline pump researched and developed on the basis of ISG and ISW pipeline centrifugal pumps. The hot water circulation pump has excellent performance, high reliability, long life, reasonable structure and beautiful appearance, and has industry-leading level. IRG (GRG) vertical hot water (high temperature) circulation pump, ISWR horizontal hot water circulation pump are widely used in: energy, metallurgy, chemical, textile, papermaking, and hotels such as boilers, high-temperature hot water pressurized circulation delivery and cities Use heating system circulation pump; IRG type use temperature T <120 ℃, GRG type use temperature T <240 ℃, ISWR type use temperature T≤120 ℃.
The hot water circulation pump mainly has the following faults: no water, insufficient flow, noise vibration, and water leakage. Yangzijiang Pump Industry specifically explains the causes and solutions of hot water circulation pump failures:
I. Reasons and Solutions for Water Discharge from Hot Water Circulation Pump
1. The inlet and outlet valves of the hot water pump are not open, the inlet and outlet pipelines are blocked, and the abortion impeller is blocked. Solution to remove obstructions.
2. Insufficient water supply at the inlet and outlet, excessive suction range, and leakage at the foot valve. Shutdown inspection and adjustment (this phenomenon is easy to occur when using grid-connected water pipes and with suction).
3. The pump is not filled with liquid and air is in the pump cavity. Open the pump cover or open the exhaust valve to exhaust the air.
4. Leakage of suction pipe of hot water circulation pump. Tighten each sealing surface to remove air.
5. The motor is running in the wrong direction, and the speed of the motor lacking phase is very slow. Adjust the direction of the motor and strengthen the motor wiring.
6. The pipeline resistance is too large, and the centrifugal pump is not selected properly. Reduce pipeline bends and reselect the pump.
2. Causes and Solutions of Insufficient Flow of Hot Water Circulation Pump
1. The inlet and outlet valves of the hot water circulation pump are not opened, the inlet and outlet pipelines are blocked, and the abortion impeller is blocked. Solution to remove obstructions.
2. The impeller of the flow channel of the pipeline and the hot water circulation pump is partially blocked, the scale is deposited, and the valve opening is insufficient. Remove the obstruction and readjust the valve opening.
3. Use over rated flow. Adjust the flow and close the small outlet valve.
4. Impeller wear. Replace the impeller.
5. The voltage of the centrifugal pump is too low. Voltage regulation.
6. Pump bearings are worn. Replace the bearing.
7. The suction of the centrifugal pump is too high. Reduce suction.
Three. Causes of noise and vibration of hot water circulation pumps and their solutions
1. Liquid is mixed with gas. Increase the suction pressure to exhaust.
2. Generate cavitation. Reduce the vacuum.
3. The pipeline support is unstable. Secure the pipeline.
4. The bearing is damaged. Replace the bearing.
5. Motor overload and heat running. Adjust the flow and close the small outlet valve.
Four. Causes of heating of hot water circulation pump motor and solutions
1. The flow of hot water circulation pump is too large and overloaded. Close small outlet valve
2. The bearing of the hot water circulation pump motor is damaged. Replace the bearing.
3. Insufficient voltage. Voltage regulation.
4. Rub. Check for exclusion.
V. Reasons for Water Leakage of Hot Water Circulation Pump
1. The pump body has sand holes or cracks. Weld repair or replacement.
2. The mechanical seal of the hot water circulation pump is worn. replace.
3. The mounting bolts are loose. Fasten.
4. The sealing surface is uneven. trim.