Let's take a look at the matters that need to be paid attention to when selecting a submersible sewage pump.
First of all, for the selection of submersible sewage pumps, in addition to the two key factors of flow and head, there are also some other details that need to be considered. For example, the flow rate of the suction and outlet pipes should not be less than 07m s, but it should not be greater than 20m/s。In addition, when the outlet pipes of submersible sewage pumps in different sumps need to be combined and discharged, valves and check valves should be installed on the outlet pipes of each sewage pump. When a single sewage pump drains water that may produce backfill, a check valve should also be provided. It is not allowed to combine the pressure drain with the gravity drain pipe in the building. When the lifting contains large pieces of debris, the submersible sewage pump should be equipped with a crushing device;When lifting sewage containing more fibers, it is advisable to use a large-channel submersible sewage pump.
Secondly, for the use of submersible sewage pumps, it is also necessary to consider the problems of automatic start and stop and manual start and stop on site. Multiple submersible sewage pumps can be operated in parallel and alternately, or they can be put into operation in sections. When the submersible sewage pump is used for drainage in the sewage collection tank, a fixed self-coupling device of the submersible sewage pump should be set up to facilitate the maintenance of the submersible sewage pump.
Finally, for other types of sewage pumps such as submerged sewage pumps and vertical sewage pumps and self-priming sewage pumps, they are less used in buildings due to their different places of use and characteristics. However, it is also necessary to pay attention to key factors such as flow rate, head and other details when choosing.
To sum up, the selection instructions for submersible sewage pumps need to pay attention to factors such as flow, head, flow rate of suction pipe and outlet pipe, and other details. At the same time, it is also necessary to pay attention to the problems of automatic start and stop and on-site manual start and stop and other precautions when using. Only in this way can the normal use of the submersible sewage pump be guaranteed and its service life prolonged.