Centrifugal pumps driven by electric motors in general, before starting the pump, the pump and the suction pipe filled with liquid. When the impeller rotates at high speed, the liquid between the vanes of the impeller to drive a rotation of the centrifugal force due to the fire pump, the liquid left behind the outer edge of the impeller (the flow rate can be increased to 15 ~ 25m / s) from the center of the impeller, also increases the kinetic energy of . When the liquid enters the pump housing, since the volute casing of the pump flow path is gradually expanded, the liquid flow rate is gradually reduced, a part of kinetic energy into static pressure, so the high pressure liquid flowing along the discharge outlet. At the same time, the center of the impeller due to the liquid being thrown out and create a vacuum, and the pressure Pa at the surface than the center of the impeller to the pump at high definition, and therefore, the liquid in the suction pipe into the pump differential pressure. Conditions constantly rotating impeller pumps, liquid also continuously being sucked and pressed out. Because of centrifugal pumps have been able to transport liquids, mainly by the centrifugal force, it is called centrifugal pump. No negative pressure water mainly by non-negative steady flow tank, pressure tank (diaphragm or bladder-type expansion tank), no negative control cabinet, pumps, motors, filters, backflow prevention device, sensors, electrical contacts, tube road components, the base and other components. On the market there are various forms of non-vacuum equipment: a regulator compensation no negative pressure water equipment 2 Box 3 overlying water supply equipment without negative pressure water supply of equipment 4 high water booster pump station pumps Tianshui | water pump | West by West Baoquan Baoquan water. Welcome to consult West Water Treatment Equipment Co. Baoquan (www.xianbaoquan.com), be sure to specify when the contact is through the "Business Alliance members" see, thank you! Contact: Wang