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Non negative pressure water supply equipment:Non-negative frequency of water supply equipment system is connected in series with the municipal tap water pipe network pressure insufficient place, through the sensor to detect the outlet pressure and is compared with the set-point value, calculate the need to increase the pressure value, to determine the number and speed of the motor water pump operation. The device to maximize the use of the original pressure of the municipal tap water pipe network of municipal pipe network, without generating negative pressure, with stainless steel water tank with or without negative pressure can replace the old pool, reducing water pollution two. Is the field of water supply of a new generation of energy-saving products.无负压变频给水设备系统串接在**自来水管网压力不足的地方，通过传感器检测出口压力并与设定值进行比较，运算出需要增加的压力值，确定水泵投入运行台数和电机转速。该设备较大限度地利用了**自来水管网的原有压力，对**管网不产生负压，用不锈钢水箱或无负压罐取代老式水池，减少了用水二次污染。是供水领域新一代节能型产