Centrifugal pump key installation technology Centrifugal pump installation height that suction stroke. Pipeline centrifugal pump installation technology is the key to determine the centrifugal pump installation height that suction stroke. This height refers to the vertical distance from the surface of the water source to the centerline of the centrifugal pump impeller. It is not confused with the allowable suction height. The allowable vacuum height indicated on the pump manual or nameplate means the vacuum value on the water inlet section of the pump, But also at 1 standard atmospheric pressure, the water temperature of 20 ℃, the test was measured and determined. It does not consider the condition of the water flow after the water supply pipe is matched. The pump installation height should be allowed to suck vacuum height deducted after the head of the suction pipe loss, the remaining part of the value, it is necessary to overcome the actual terrain water absorption height. Pump installation height can not exceed the calculated value, otherwise, the centrifugal pump will not pump water. In addition, the impact of the calculated value is the size of the suction pipe lift loss lift, it is appropriate to use the shortest pipe layout, and try to install less elbow and other accessories, but also consider the appropriate with some larger diameter pipes to reduce the flow rate within the pipe. It should be noted that the pipeline centrifugal pump installation site elevation and water temperature is different from the test conditions, such as the local elevation of 300 meters or more than the water temperature is pumping water, the calculated value to be amended. That is, the atmospheric pressure at different altitude and the saturated steam pressure above 20 ℃. However, when the water temperature is below 20 ℃, the saturated steam pressure is negligible. From the pipeline installation technology, water pipes require strict sealing, can not leak, leaking, or will undermine the centrifugal pump inlet at the vacuum, so that the centrifugal pump to reduce the amount of water, even when the pump is not pumping. Therefore, we should conscientiously do the work of the interface of the pipeline to ensure the construction quality of pipeline connection.