Pressure (head) unit
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Dear colleagues, today I came across some old documents in which the unit of pump head is given as m.c.l. For example, a feed pump has a flow rate of 4 m3/h and a head of 0.42 m.c.l. This unit probably isn’t meters of water column, otherwise the outlet pressure would be too low; in fact, the outlet pressure observed on-site is around 2 kilograms per square centimeter. Therefore, I suspect that this unit might represent 42 meters of water column, but I couldn’t find any relevant information on this. Does anyone know of instances where this unit was used? Thank you!
Keep an eye on it; the head is now in meters. I didn’t know before. Previously, books also used a unit called “gram-mole”; I didn’t know that either. Then go ask; I was laughed at once :)
M.L.C is the abbreviation for meter liquid column, that is, meters of liquid column. It generally refers to the pressure represented by a water column.
Thank you all. Based on the data provided for the pump, its power is specified as 4 kW; from this it can be inferred that the head is approximately 37 meters, or 0.37 Mpa. However, the unit m.c.l is confusing, and it’s possible that the information in those old documents was incorrect.