Pump Delivery Height

[engineer24]

I'm trying to convert the specs on a German made chiller. The water pump is rated at 27 mWC as the 'pump delivery height'. Is this 27 meters of water column? If so, what would the conversion be to inches of water or psi?

 

[RWF7437]

27 meters is = 88.58 feet of water which is 38.35 psi.

1 meter = 39.37 inches = 3.281 feet

1 psi = 2.31 feet of water

 

[engineer24]

Thanks for the information. Am I correct in the assumption that mWC stands for meters of water column?

 

[RWF7437]

I don't know but it seems logical. I live and work in the U.S. so mostly I use US customary units. Perhaps one of our Canadian or European friends can confirm this ?

 

[quark]

Generally pumps deliver any liquid (irrespective of specific gravity) to same height (as per the pumps design). That is why head is always told in MLC (meters of liquid column). In your case MWC is meters of water column. For getting PSI, in case of water, it is a direct calculation. But for other liquids you have to put specific gravity into the equation.

 

[25362]

Are you sure it is "delivery height" and not total head ?

 

[Kawartha]

engineer24,

I agree with the above posts. 27 mWC means 27 meters of head (water column).

25362,

Normally pump ratings define the differential head (also known as TDH and total head) produced by the pump at the rated flow rate. Pump discharge pressure is equal to the suction pressure plus the differential pressure.

 

[25362]

To Kawarta, that's the reason for my asking.