Centrifugal pump installation technology is the key to determine the installation height of the pump. 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, marked on the pump nameplate or product specification 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; the water temperature 20 degrees Celsius, test and determination to come. It does not take into account the current situation of water after the water pipe. And the pump mounting height should be allowed to smoke on the vacuum to deduct a high suction pipe head loss after, the remaining part of the value, it is necessary to overcome the actual water height of the terrain. 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, pump installation site elevation and the water temperature is different from the experimental conditions, such as local elevation of 300 meters above or pumping water temperature more than 20 Celsius degrees, the calculation values are to be amended. 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.
