Pressure unit at the pump outlet
Thread Content
This post was last edited by lingchen300 on 2010-11-5 at 14:42. In the instrument data provided to us by the design institute, the unit for the measurement range of the pump outlet pressure in the distillation unit is kPa, while the unit for the set values is MPa G. Why is this? For example, the measurement range of the feed pump in the pressure tower is 0~2.5 kPa, but the set control value is 1.1 MPa G
kPa and MPa are just a matter of conversion. 1 MPa = 1000 KPa; 0–2.5 kPa is equivalent to 0–0.25 MPa
“For example, the measurement range of the feed pump in the pressure tower is 0~2.5 kPa, but the set control value is 1.1 MPa G”. Is this value accurate? How is it possible that the pressure at the pump outlet is only a few KPa? Assuming a pressure of 0.7 MPa in the pressure tower, the feed pump for this tower should have a pressure of at least 1 MPa; 1.1 MPa is a fairly reasonable value!
Thank you all for your concern. I asked my supervisor later, and it turned out that the unit used for the measurement range was incorrect; it should be MPa. I’m really sorry for the inconvenience this has caused everyone
It’s okay to joke around sometimes. The outlet pressure of a pump equals the inlet pressure plus the head/100, right?
Pump outlet pressure = Pump inlet pressure + head * 0.1 * density of water / 10.336