Self priming pump suction and self-priming height can not be confused, self suction pump suction contains self-priming height and horizontal distance, self suction pump suction in theory is not exceeding the prescribed value of 10 meters, but can and other auxiliary facilities to improve the self suction pump suction process such as vacuum pump and water pump bottom valve. There is the installation of self suction pump technology is very critical, the following is to explain a few points on the installation of self suction pump technology:
1. The installation technology of self - priming pump is the key to determine the installation height of self - suction pump. This height is refers to the wvter surface to pump impeller center line of the vertical distance, it allows the ceiling should not be confused on a high vacuum, and self-priming 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. Self priming pump installation height can not exceed the calculated value, otherwise, since the suction pump will suck up 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.
2. It should be noted that the installation location of the self suction pump elevation and water temperature is different from the test, 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.
3. From the pipeline installation technology, suction pipes require strict sealing, can not leak, leakage, otherwise it will damage the vacuum pump inlet, pump outlet is reduced, serious and 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.
