No negative pressure frequency conversion pump is a new type of water supply equipment, the pump unit, control equipment, booster regulator three major components, water supply capacity by the pump unit decision. Now to say nothing negative pressure pump what is the working principle. Negative pressure variable frequency pump Negative pressure variable frequency pump works 1, when the tap water pressure PZ is lower than the user-required set pressure Py, the programmable controller will automatically frequency conversion soft start running until the actual pressure of the pipeline Pz = Py , Programmable logic controller to control the pump to a constant speed operation. Water pressure Pz high, the lower the speed of the inverter pump, tap water pressure Pz lower, the higher the speed of the pump. When the tap water pressure Pz = Py, the variable frequency pump to stop working not only make full use of the original pressure of tap water, but also to ensure that users need constant pressure. 2, variable frequency pump inlet connected with no negative pressure tank. The programmable controller detects the pressure in the non-negative pressure tank from time to time, and controls the vacuum suppressor to stabilize the pressure of the non-negative pressure tank and tap water so as not to generate the negative pressure so as to ensure the normal water supply of the water supply network. 3, tap water, the device automatically shut down, water automatically boot, power failure automatically restore water pressure water supply. Further Reading: pump valve pipe fittings Exhibition 2016 Exhibition of Information Industry, Internet (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / micro letter:) http://beng.liuti.cn/ (Hotline :)