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Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet

  • Categories:Industry News
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  • Time of issue:2020-12-01 13:15
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(Summary description)The pumps should be of the same type, and the number of pumps should not be less than 2, and not more than 8. When the water volume changes greatly, water pumps of different specifications can be configured, but not more than two types, or use variable frequency speed regulation device, or use blade adjustable water pump. The sewage pump room and the combined sewage pump room should be equipped with pumps. When the number of working pumps is not more than 4, the number of standby pumps should be one. When the number of working pumps is not less than 5, the number of standby pumps should be 2; when there are 2 standby pumps in the submersible pump room, one can be reserved on site and one is reserved in stock. The rainwater pump room may not be equipped with pumps. The rainwater pump room on the interchange road may be equipped with standby pumps depending on the importance of the pump room.

Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet

(Summary description)The pumps should be of the same type, and the number of pumps should not be less than 2, and not more than 8. When the water volume changes greatly, water pumps of different specifications can be configured, but not more than two types, or use variable frequency speed regulation device, or use blade adjustable water pump. The sewage pump room and the combined sewage pump room should be equipped with pumps. When the number of working pumps is not more than 4, the number of standby pumps should be one. When the number of working pumps is not less than 5, the number of standby pumps should be 2; when there are 2 standby pumps in the submersible pump room, one can be reserved on site and one is reserved in stock. The rainwater pump room may not be equipped with pumps. The rainwater pump room on the interchange road may be equipped with standby pumps depending on the importance of the pump room.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-12-01 13:15
  • Views:
Information

The choice of water pump should be determined according to factors such as design flow and required head, and should meet the following requirements:

The same type of water pump should be selected, and the number of pumps should not be less than 2, and not more than 8. When the water volume changes greatly, water pumps of different specifications can be configured, but not more than two types, or use variable frequency speed regulation device, or use blade adjustable water pump. The sewage pump room and the combined sewage pump room should be equipped with pumps. When the number of working pumps is not more than 4, the number of standby pumps should be one. When the number of working pumps is not less than 5, the number of standby pumps should be 2; when there are 2 standby pumps in the submersible pump room, one can be reserved on site and one is reserved in stock. The rainwater pump room may not be equipped with pumps. The rainwater pump room on the interchange road may be equipped with standby pumps depending on the importance of the pump room.

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Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet
Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet
The pumps should be of the same type, and the number of pumps should not be less than 2, and not more than 8. When the water volume changes greatly, water pumps of different specifications can be configured, but not more than two types, or use variable frequency speed regulation device, or use blade adjustable water pump. The sewage pump room and the combined sewage pump room should be equipped with pumps. When the number of working pumps is not more than 4, the number of standby pumps should be one. When the number of working pumps is not less than 5, the number of standby pumps should be 2; when there are 2 standby pumps in the submersible pump room, one can be reserved on site and one is reserved in stock. The rainwater pump room may not be equipped with pumps. The rainwater pump room on the interchange road may be equipped with standby pumps depending on the importance of the pump room.
Causes of pump cavitation
Causes of pump cavitation
Causes of pump cavitation 1. Air leakage in the inlet pipe. 2. The liquid level is too low and air is inhaled. 3. The inlet pipeline design is unreasonable, and the highest point is higher than the impeller (only refers to the suction of water). 4. The installation method is unreasonable. In some places, the atmospheric pressure is low, and the cavitation margin of the selected pump itself is large, or the pipe diameter is too small, and the resistance is large. It can only be used to suck water when inverted. 5. The pressure of liquid vaporization increases. 6. The type selection is wrong, and the pump deviates seriously from the optimal working point. 7. Eliminate the damage of the air valve, the air is not exhausted or other reasons cause the pipeline and pump body to not exhaust the air.
Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet
Comprehensive knowledge of water supply and drainage: the selection of pumps for sewage pumping stations should meet
The pumps should be of the same type, and the number of pumps should not be less than 2, and not more than 8. When the water volume changes greatly, water pumps of different specifications can be configured, but not more than two types, or use variable frequency speed regulation device, or use blade adjustable water pump. The sewage pump room and the combined sewage pump room should be equipped with pumps. When the number of working pumps is not more than 4, the number of standby pumps should be one. When the number of working pumps is not less than 5, the number of standby pumps should be 2; when there are 2 standby pumps in the submersible pump room, one can be reserved on site and one is reserved in stock. The rainwater pump room may not be equipped with pumps. The rainwater pump room on the interchange road may be equipped with standby pumps depending on the importance of the pump room.
Causes of pump cavitation
Causes of pump cavitation
Causes of pump cavitation 1. Air leakage in the inlet pipe. 2. The liquid level is too low and air is inhaled. 3. The inlet pipeline design is unreasonable, and the highest point is higher than the impeller (only refers to the suction of water). 4. The installation method is unreasonable. In some places, the atmospheric pressure is low, and the cavitation margin of the selected pump itself is large, or the pipe diameter is too small, and the resistance is large. It can only be used to suck water when inverted. 5. The pressure of liquid vaporization increases. 6. The type selection is wrong, and the pump deviates seriously from the optimal working point. 7. Eliminate the damage of the air valve, the air is not exhausted or other reasons cause the pipeline and pump body to not exhaust the air.

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Time of issue:2020-11-06 13:43:33

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Time of issue:2020-11-06 13:36:55
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