monoethylene glycol pump

[hyposmurf]

In a system I have a mono ethylene glycol 60% water 40%.
The fluid is runing from -20 to -5 °C flow is 45 m3/hour and spectec head 22 meter water column .

Despite this data I need to know how to choose the proper pump and spec it as handling water.

Thanks in advance

 

[pumpking]

Your almost there !! Flow, head, temperature, product. All you need to know now is SG/Density, viscosity, solids present ? power supply to drive and any hazardous area rating ??

The pump manufacturer will have to select a suitable material and mechanical seal assembly to handle the product at -20'C

Hope this answers your query ?????

 

[hyposmurf]

To best understand my query.
I will state it as follow , for a given pump spec handling water at 20ºC normal atmosferic pressure.Guess one of it`s point says it can handle 45 m3/hour at 22 meter water head .
What will be the flow and head pressure aviable if the fluid is monoethylen glicol at -18ºC?

 

[PumpSmart]

hyposmurf,
There could be 02 questions:
1. What is the best selection for this application?
Materials, for -18C (-0.4 F). From -20 F, normal
materials should be used. Low Carbon Steel and
Low Carbon Stainless Steel should be considered as alternative if temperature decreases.
2. What happen with fluid and performance at -18 C?
For 40%, Freezen point is -20.6 C, GE is 1.032, and Cp is about 60, so you should derate your rated point in
about 5% in Head and about 15% in Power Rating for
viscous derating.
See GE and Freezing Point in:

http://en.wikipedia.org/wiki/Ethylene_glycol_(data_page)#Material_Safety_Data_Sheet.

 

[dcasto]

watch your density, is that 60% volume, Wt, mole?

 

[hyposmurf]

Density does not affect centrifugal pumps.

 

[dcasto]

hyposmurf, HUH? Humm so the same pump will get either my liquid Hg or liquid ethane into a fixed pressure tank?

 

[hyposmurf]

Yes for the head , of course if it is centrifugal pump and if the VISCOSITY OF HG and liquid ethane are the same .
That´s is for the pump , but the motor will not be the same, As the power is flow times head times specific gravity .