Non-negative pressure water supply equipment is a water supply equipment consisting of non-negative pressure tank, pump set, control cabinet, pressure stabilizing tank and pipe valve accessories. It is connected in series where the pressure of municipal tap pipe is insufficient. The equipment detects the outlet pressure through pressure sensor, compares the detection value with the set value, calculates the pressure value that needs to be increased on the basis of the original pressure of municipal tap pipe, and determines the pressure value. The number of pumps pushed into the operation table and the output frequency of the transducer (reacting to the motor and pump speed) to achieve constant pressure in accordance with the water curve. The non-negative pressure variable frequency water supply equipment makes use of the original pressure of the municipal water supply network, does not produce negative pressure on the municipal water supply network, replaces the old water pool with the non-negative pressure tank, reduces the secondary pollution of water, and is a new generation of energy-saving products in the field of water supply.
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