Question about the reading on the pressure gauge at the outlet of the centrifugal pump! ! ! ! !
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This post was last edited by Zaza Ya on 2016-5-2 05:44. I would like to ask everyone: for a centrifugal pump with a flow rate of 30 and a head of 60 meters, using water as the medium (the equipment has not yet been put into operation), what should the head of the installation be? The filter press is connected at the front end; the filter cloth has not yet been installed. During startup and testing, the pressure gauge showed a pressure of only around 0.1 MPa. (The pressure gauge is located below the outlet valve) But when checking at the filter press at the outlet, it was found that the flow rate was extremely high, and the pressure was far more than 1 KG; I’d like to know the reason! ! ! Seeking advice
"What does “the pressure is far more than 1KG” mean? Is it the value shown on the pressure gauge or is it just a feeling of high pressure?
By your words, at least one of the pressure gauges is giving an inaccurate reading. Check whether the valve at the base of the pressure gauge is open, whether the pressure gauge’s range is appropriate, and whether the pressure gauge is damaged.
The centrifugal pump has a head of 60 meters, the installation height is 10 meters, and the actual head is 50 meters. The filter press does not have a filter cloth installed, which means it operates with an open outlet; in other words, the pipe length is very short, so the flow rate is high and the pressure is low.
That’s correct; during testing, the pressure at the inlet is static pressure, almost zero.
The low resistance of the outlet pipeline results in high flow rates and low gauge pressure
When your equipment is operating properly, the pressure should be 0.7 Mpa. However, since the filter cloth in the outlet filter press isn’t installed at present, there is no pressure drop in the downstream section. It is likely that the material being pumped is returning to the inlet of the pump; therefore, the pressure shown on the pressure gauge at the pump’s outlet actually represents the pressure at the pump’s inlet, which is 0.1 MPa. Thus, the pressure gauge is showing the correct value.