Pipeline centrifugal pump installation technology is the key to determine the installation height of the pump (ie suction process). The height is the vertical distance from the water surface to pump impeller centerline, it and allow the ceiling should not be confused on a high vacuum, pump product specifications or nameplate marked on the allowable suction height is refers to the value of the section of the water inlet of the water pump of the vacuum and under standard atmospheric pressure, water temperature 20 degrees Celsius, the determination to carry out a test. It does not take into account the current situation of water after the water pipe. The pump installation height should be allowed to suck up the vacuum after deducting the suction pipe loss head, the remaining part of the value, it is to overcome the actual height of water absorption. Pump installation height can not exceed the calculated value, otherwise, the pump will not draw water to. In addition, the impact of the value calculated is the water pipe resistance loss of lift, therefore, should adopt the shortest piping layout, and minimize the loaded elbow fittings, also can consider appropriate with larger diameter pipes to reduce the flow velocity in the tube.
It should be noted that the installation location of the pipeline centrifugal pump elevation and water temperature is different from the test conditions, such as the local elevation of more than 300 meters or more than 20 degrees Celsius water temperature, the calculated value to be modified. Atmospheric pressure at different altitudes and the saturation vapor pressure at temperatures above 20 degrees celsius. However, when the water temperature is below 20 degrees Celsius, the saturated vapor pressure is negligible.
From the pipeline installation technology, suction pipes require strict sealing, can not leak, leakage, otherwise it will damage the pump water inlet of the vacuum, the pump to reduce the amount of water, serious when even pumping Sheung Shui to. Therefore, to do a good job in the pipeline interface, to ensure the quality of the construction of the pipeline connection.
