Sewage pump discharge flow should be designed to select the second life of the drainage; when the displacement adjustment, according to the life of the largest hour of discharge selected. Fire elevator pool drain pump flow rate of not less than 10L / s. Public buildings should be used for each living drainage cistern as a unit to set up a spare pump, usually should be run interactively. Basement, equipment room, garage flushing the ground drainage, if there are two or more than two sewage pump equipment pump. Sewage pump lift by lifting height, pipe loss calculation is confirmed, then add a certain free head. Free head should adopt 0.02 ~ 0.03MPa. Suction pipe and outlet pipe flow rate should not be less than 0.7m / s, and should not be greater than 2.0m / s. When the sump can not set the accident drain, the sewage pump should have uninterrupted power supply; when you can close the drainage pipe, it may not provide uninterrupted power supply, but should set the alarm device. When upgrading sewage and wastewater with larger impurities, the outlet pipes of the submersible sewage pump in different sumps should not be merged and discharged. When upgrading the general wastewater, the discharge pipes of submersible sewage pumps of different sumps may be merged and discharged according to the actual situation . When two or more sewage pumps share one outlet pipe, a valve and a check valve shall be installed on each outlet pipe of the sewage pump. A single sewage pump drainage may occur when the backflow should be set check valve. Do not allow the pressure drain and the building gravity drainage pipe merged discharge. When the submersible sewage pump to enhance large debris, the submersible sewage pump should be equipped with a comminution device; when upgrading with more fibrous waste water, should adopt a large 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 can be fixed auto-coupling device; when the submersible sewage pump motor power is less than 7.5kW or outlet diameter less than DN100, the hose can be set Mobile installation. Sewage collection pond submersible sewage pump drainage should be set submersible sewage pump fixed auto-coupling device to facilitate submersible sewage pump maintenance. Submersible sewage pump should be able to automatically start and stop the scene and start and stop manually. Multiple submersible sewage pumps can be alternately operated in parallel, can also be put into operation in stages. Submersible sewage pump is a water pump and motor Siamese, and at the same time submerged work under the pump products, compared with the general horizontal pump or vertical sewage pump, submersible sewage pump obviously has the following advantages: Compact structure, small footprint. Submersible sewage pump submersible work, so can be installed directly in the sewage tank, without the need to build a dedicated pump room for the installation of pumps and machines, you can save a lot of land and infrastructure costs. 2 installation and maintenance easy. Small submersible sewage pump can be freely installed, large submersible sewage pumps are generally equipped with automatic coupling device can be automatically installed, installation and maintenance quite convenient. 3. Continuous operation for a long time. Submersible sewage pump due to pump and motor coaxial, short shafts, rotating parts light weight, so the bearing load (radial) is relatively small, longer life expectancy than the average pump. 4. There is no cavitation damage and irrigation water and other issues. Especially after the point to the operator has brought great convenience. 5. Vibration noise, low motor temperature, pollution-free environment. It is because of the above advantages, submersible sewage pump has been more and more people's attention, the use of a more and more wide range from the original purely for the transport of fresh water to the present can transport a variety of domestic sewage, industrial wastewater, construction Site drainage, liquid feed and more.
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