non-negative pressure equipment working principle:

non-negative pressure equipment working principle:

The non-negative pressure equipment can be connected on the municipal pipe network directly, setting required pressure on frequency control cabinet, which will compare the municipal pipeline pressure with the setting value, then send the signal to PLC programmable controller through A/D module. After that, it will calculate and export frequency controller's rate singal, depends on the singal, the frequency controller will adjust the motor's speed to achieve constant pressure water supply.