Submersible pump submersible pump selection and matters needing attention

Drainage pumps used in the building are submersible sewage pump, liquid type non clogging sewage pump, vertical sewage pump and horizontal sewage pump and so on. Due to the building site in general smaller, less displacement, the drainage pump can give priority to the use of submersible sewage pump and liquid type non clogging sewage pumps, in which liquid sewage pump generally used in important places; vertical and horizontal sewage pump sewage pump requirements set base isolation, since the irrigation type absorbent, and occupied a certain space, so in the construction of less use of.

Drainage pump flow should be selected according to the design flow of life, when there is a displacement of water, can be selected according to the maximum flow of life. Fire elevator sump pump flow is not less than 10L/s. The head of the drainage pump is determined according to the lifting height and pipeline loss calculation, and then a certain free head is added. Free head should adopt 0.02 ~ 0.03MPa. Drainage pump suction pipe and outlet pipe flow rate of not less than 0.7m/s, and should not be greater than 2.0m/s. The public building should set up a spare pump for the unit in every living drainage pool. Underground room, equipment room, garage floor drain, if there are two or more than two sets of drainage pump can not pump. When the water collecting basin can not be provided with an accident drainage pipe, the water pump should have uninterrupted power supply; when the water inlet pipe can be closed, the uninterrupted power supply can not be provided, but the alarm device should be set up. When the upgrade with a large impurities, dirt and water, different sump in the submersible sewage pump outlet pipe should not discharge the merger; when upgrade their wastewater, according to the actual situation in the different sump of submersible sewage pump outlet pipe combined discharge. Two or more than two shared a water pump outlet pipe, shall be installed at each pump outlet pipe on the valve and check valve. A single pump water intrusion may arise when the valve should be set. Don't allow the pressure of the drainage and construction of gravity drainage pipe combined discharge. When the submersible sewage pump to raise a large debris, the submersible sewage pump should be equipped with a crushing device; when upgrading the sewage containing more fiber, it is appropriate to use a large channel submersible sewage pump. When the submersible sewage pump motor power is greater than or equal to 7.5kW or outlet diameter greater than or equal to DN100, the pump fixed auto plant; when the submersible sewage pump motor power 7.5kw or less than the outlet pipe diameter is less than DN100, set up mobile hose installation. When the sewage sump is drained by submersible sewage pump, the pump should be set up to fix the self coupling device, which is convenient for the maintenance and repair of the pump. Drainage pump should be able to automatically start and stop the scene manually start and stop. Multiple pumps can be run in parallel, can also be put into operation.