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BigInch , Thanks for the reply , i still dont think it is an NPSH problem , since the pit is 90' deep and about 30'X 50' long. Im posting a layout of the lab. Im suspecting they might be some turbulance messing up the flowmeter readings. http://img211.imageshack.us/my.php?image=testttlw7.jpg

BigInch , you are right. I should be getting the same data, but im not. The head we are measuring is the Total head. Pumping Clean water on a vertical pump. Bowl Size is 24" Piping thru a 12" discharge.400 HP , about 10000 GPM @ 85' of head.

Hi, I don’t know if anybody has seen this before, but recently as i was testing a pump, I found out something strange, and would like you guys input. Here is what s going on. When i test a pump and go from shut off all the way to the max flow, i get a set of data, that is different than one i...

Arline , You are right , when it comes to Reed = 188/Sqrt(deflection) Your discharge Head stiffness ( second moment of inertias) changes ( Base plate , Stuffing box plate ,Windows opening etc). By using FEA methods , you will be able to determine the deflection of your cantiliver beam with...

Physical Type? it will be a cylindrical , Bowl bearing .

Hi , I am looking for a bearing material , to be used in a vertical Pump , The water to be pumped is 140 degree f. The water has high level of sulfate (1087 mg/l) and chloride (879 mg/l) Total hardness is 1630 mg/l. I was looking into using PEEK or Thordon material. Anybody has used / or can...

Hi , I am looking for a bearing material , to be used in a vertical Pump , The water to be pumped is 140 degree f. The water has high level of sulfate (1087 mg/l) and chloride (879 mg/l) Total hardness is 1630 mg/l. I was looking into using PEEK or Thordon material. Anybody has used / or can...

Thanks for all your replies , i did calculate the thrust load , but i wanted to check it by measuring it. I came across an old technical paper where hydraulic fluid was used along with a thrust gage, just like a piston.Strain gage and elctronics wont do it if you have a rotating shaft at...

Hi , is there a device to measure the axial thrust of a vertical pump? I know it can be done using axial load cell , but ...:(.i need to measure the total thrust generated by a vertical pump. Thank you for any idea/ help

I need to do a vibration test on a pump and was wondering if API 610 have a vibration severity chart , or is it just iso 10816 or (HI)? i dont have the latest API standard (i think they are on their 10 ed) but is it still Vibration vs flow (plot)? Thanks

Hi there , im wondering what is the difference between critical speed and reed frequency of a shaft.I believe both are defined as 187.7/sqrt(deflection). Thanks