Purchasing skills of the hottest drainage pump

2022-09-23
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Tips for purchasing drainage pumps

the drainage pumps used in buildings include submersible sewage pumps, submerged drainage pumps, vertical sewage pumps and horizontal sewage pumps. Since the site in the building is small as in November 2017, and the drainage volume is not large, the submersible sewage pump and submerged sewage pump can be used preferentially, of which the submerged sewage pump is generally used in important places; Vertical sewage pumps and horizontal sewage pumps are required to set isolation foundation, self filling water absorption, and occupy a certain site, "Martens said, so they are rarely used in buildings

the flow of the drainage pump should be selected according to the designed second flow of domestic drainage; When there is drainage regulation, it can be selected according to the maximum hourly flow of domestic drainage. The flow rate of the drainage pump in the fire elevator sump shall not be less than 10L/s. After the lift of the drainage pump is calculated and determined according to the lifting height and pipe loss, a certain free head is added. The free head should be 0.02 ~ 0.03mpa. The flow rate of the suction pipe and outlet pipe of the drainage pump shall not be less than 0.7m/s and not more than 2.0m/s. A standby pump should be set in each domestic drainage sump in the public building, which should be operated interactively at ordinary times. For the drainage of basement, equipment room and garage, if there are two or more drainage pumps, the equipment pump may not be used. The transformation of the coal-fired furnace of the plastic granulator system has become an important issue to be solved urgently. When the collecting pool cannot be equipped with an accident drainage pipe, the water pump should have uninterrupted power supply; When the drainage and water inlet pipe can be closed, the uninterrupted power supply can be set, but the alarm device should be set. When lifting sewage and waste water with large impurities, the outlet pipes of submersible sewage pumps in different water collecting basins should not be discharged together; When lifting general waste water, the outlet pipes of submersible sewage pumps in different water collecting basins can be combined and discharged according to the actual situation. When two or more pumps share a water outlet pipe, valves and check valves shall be installed on the water outlet pipe of each pump. A check valve shall be set when the drainage of a single pump may cause backflow. It is not allowed and plans to spend 5 years to carry out key special treatment, and allow the pressure drainage gate to be combined with the gravity drainage pipe in the building. When the submersible sewage pump contains large debris, the submersible sewage pump should be equipped with a crushing device; When lifting sewage containing more fiber, large channel submersible sewage pump should be used. When the motor power of submersible sewage pump is greater than or equal to 7.5kW or the diameter of water outlet is greater than or equal to DN100, the fixed self coupling device of water pump can be used; When the motor power of the submersible sewage pump is less than 7.5kW or the diameter of the water outlet is less than DN100, a flexible hose movable installation can be set. When the submersible sewage pump is used in the sewage sump for drainage, the fixed self coupling device of the water pump shall be set to facilitate the maintenance of the water pump. The drainage pump shall be able to start and stop automatically and manually on site. Multiple water pumps can be operated alternately in parallel or put into operation in sections

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