Pump outlet pressure and head

The pressure at the outlet flange is the accurate value; further downstream, the pipeline’s characteristic curve must be taken into account, otherwise it can’t be said that the pressure at the open end is 0

The pressure that is observed when the outlet valve is closed is the outlet pressure.

The last edit to this post was made by CHANGBAISHI on 2019-11-20 at 16:02. The first thing to consider regarding this issue is that the operating conditions of the pump itself must be ensured. It is necessary to ensure that it remains within the process conditions specified on the water pump label. For example, while maintaining a certain pressure, the water flow rate is maximized, within the range specified by the rated current. Consider other options within this range. “The inlet pressure of the water pump is 0.1 MPa, with a head of 50 meters; the outlet is connected to a large pipe with a pressure of 0.35 MPa. In this case, what is the pressure at the pump’s outlet: 0.6 or 0.35? ”This requires that, under the conditions specified for the pump itself, the current and flow rate remain within the rated ranges; the pressure should not be 0.6 – rather, it should be \"50 meters of head\" in order to meet the production requirements of the pump. If it’s higher than this value, the gauge needs to be checked. For reference. Note: When the inlet pressure of the centrifugal pump is at the specified value, but the outlet pressure is below the specified value, the flow rate increases and the current increases.

First, confirm where the 0.35 MPa pressure value comes from

For a pump with a head of 50 meters, an inlet pressure of 0.1, and an outlet connected to a pipeline at a pressure of 0.35, the pressure should be around 0.6 when the outlet valve is closed. When the outlet valve is opened to the pump’s rated flow rate, the pressure will decrease according to the pump’s performance curve and that of the outlet pipeline; it will be lower than 0.35 but higher than 0.6