The installation height of the
pump and allows the suction on the vacuum degree is not to be confused, pump product specifications or nameplate e marked allowed suction on the vacuum degree is refers to the value of the section of the water inlet of the
water pump of the vacuum and in a standard atmospheric pressure, water temperature 20' C, rated by test and determination of. To allow the suction on the vacuum degree does not take into account the flow situation after the suction pipe. The
water pump installation height is allowed to suck on the vacuum degree after deducting the loss of water head, the rest 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
centrifugal pump atmospheric pressure and water temperature is different from the test conditions, such as local elevation above 300m or the water temperature is more than 20 degrees Celsius, the calculated value to be modified. That is, the atmospheric pressure at different elevation is higher than 2. Saturated vapor pressure at the temperature of water temperature is calculated. However, when the water temperature is below 20 degrees Celsius, the variation of saturated vapor pressure is negligible.
From the pipeline installation technology, suction pipes require a strict for sealing and can not leak, leakage, otherwise it will damage the pump water inlet of the vacuum, the pump to reduce the amount of water, 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.
The installation height of the pump can be calculated by the allowable suction seven vacuum degree.
