How to choose horizontal centrifugal pump
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April 22 15:20:42, 2023
How to choose horizontal centrifugal pump: 1, should choose high efficiency, low noise, energy-saving horizontal centrifugal pump, no choice to eliminate the product. 2, should be based on the design flow, the required lift election pump, and consider the pump due to wear and tear caused by decreased pump output, according to the calculated head H multiplied by 1.05 to 1.10 coefficient after the pump; should choose the characteristic curve with the flow rate increases Its pump head gradually decreased, this pump is stable, reliable work in parallel; and the pump operating point of operation should be maintained in high-efficiency operation, so that energy-saving and not easy to damage the mechanical parts. 3, when the water supply network without adjustment facilities, should be used speed pump group or rated speed pump group marshalling run water supply. The maximum output of the pump group should not be less than the design of district water flow, and should check the fire conditions. 4, select the tank, water tower lift pump should minimize the number of pumps, should be a use of a prepared; when a single pump to meet the requirements, it is not appropriate to use more than one parallel; if you must use more than one parallel operation or size of the pump with When its model, the number of units should not be too much, generally not more than two models, horizontal centrifugal pump lift range should be similar; parallel operation of each pump should still be operating within the high-performance area. 5, variable frequency speed control pump design water flow should ensure that the life of the water supply system to meet the maximum design of the second flow requirements. The power supply must be reliable; the working point of the pump should be selected in the efficient working area of ​​the pump characteristic curve, and should not be selected on the extension line of the QH curve. The most unfavorable working point of the design should be at the right end point of the high efficiency section of the pump characteristic curve The maximum amount of water out of the pump, while the head is lower but to meet the requirements of that point, that is, the low point of the pump characteristic curve of high efficiency and the intersection of pipeline characteristics curve. Pump speed range of work can be as efficient as possible within the pump; speed range should be set at 25% to 100% of the pump water supply; equipment should have automatic water level control. 6, life pressurized water pump system should be set up standby pump, spare pump water supply capacity should be greater than the maximum capacity of a running water pump, the pump should automatically switch, alternating operation. 7, horizontal centrifugal pump with the same voltage of the motor, and the power system should be the same as the national grid power supply system. Weidelong Pump Co., Ltd. sincerely hope to hear your voice Oh ~ ~