When Choosing A Submersible Sewage Pump In A Building, You Should Refer To These!

When choosing a sewage pump under the liquid in a building, you should refer to these!There are many types of drain pumps used in buildings, among which it is a common one, even if the sewage pump is under liquid, because the area in the building is usually small and the water discharge volume is not large. The sewage pump under liquid is often used in important places. Let’s take a look at how to choose and use the sewage pump in the building.1. The flow rate needs to be selected based on the second flow rate designed for domestic drainage. If the water discharge is required, you can choose according to the large and small values \u200b\u200bof domestic drainage.The head of the sewage pump needs to be calculated based on the specific height and pipeline loss. It should also be noted that a certain free water head must be added.In the selection of free water head, 0.02~0.03MPa can be used, and the water flow speed cannot be less than 0.7m/s, of course, it cannot be too large, and cannot be greater than 2.0m/s.2. Public buildings require each unit to be equipped with a spare pump. In normal times, these spare pumps can be used alternately, and the basement, equipment room, and garage can be used to flush the drainage on the ground. If there are 2 or more drainage pumps, there is no need to set up a spare pump.If the setting of the sewage pump under the liquid cannot be performed due to the problem of the water collection tank, it is necessary to ensure that the water pump should have uninterrupted power supply. Uninterrupted power supply needs to be set up when closing the pipeline. At the same time, it should be noted that an alarm device needs to be equipped.3. When the impurities of sewage are large, if the sewage and wastewater with larger impurities are lifted, it should be noted that the submersible sewage pump outlet pipes in different types of water collection tanks cannot be combined. When lifting general wastewater, the combined use of different sewage pump water pipes needs to be considered according to the actual situation.When two or more liquid sewage pumps use the same water outlet pipe, it should be noted that valves and check valves are required to be installed on each sewage pump. If a single water pump is drained, there may be a certain possibility of backflow. Therefore, check valves are also required. The pressure drainage switch cannot be combined with the gravity drainage pipe in the building. If the discharged sewage contains relatively large impurities, a crushing device must be added inside.Therefore, when choosing a sewage pump under the liquid in a building, you may wish to refer to the above aspects to choose the appropriate one.