Practical way to get Impeller Diameter
Practical way to get Impeller Diameter
(OP)
I have my pump's curve from a KSB -RPK/HPK-Y pump, and i've already plot my system curve, but I dont know and havent found the actual impeller width of my pump. I dont know if it has been modified in any way. In order to get the operation point of the system, I need to know the impeller diameter in such a way to choose from the pump curves the corresponding curve of the actual impeller diameter.
Do you know any practical way to get the impeller diameter?, since i dont have any way to measure the actual flow.....
I would appreciate very much your valuable respond.
EB
Do you know any practical way to get the impeller diameter?, since i dont have any way to measure the actual flow.....
I would appreciate very much your valuable respond.
EB





RE: Practical way to get Impeller Diameter
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RE: Practical way to get Impeller Diameter
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: Practical way to get Impeller Diameter
Im a new grad, im trying to learn all this, and also trying to get my job done. Thanx for your interest...
EB
RE: Practical way to get Impeller Diameter
Working from your curve will at best only give you a calculated theoretical performance not the actual site performance.
However, if for some reason the impeller diameter must be known, the only reliable way without access to the information from your own records or from the supplier, is to dismantle the pump and measure the impeller diameter, nothing else will give you the correct answer.
Naresuan University
Phitsanulok
Thailand
RE: Practical way to get Impeller Diameter
There are few ways to find out - I do not know how accurate you wanna be.
1. If the pump has a nameplate - the diameter of the fitted impeller is normally stamped on the nameplate.
2. Roughly speaking, you can guestimate the diameter of the impeller by inserting you duty point - (i.e. volume and head )onto the book pump curve - which you said you have.
3. Send an e-mail to KSB with Pump reference serial number (stamped on the nameplate but also on major components such as casing ) and they will have this information on their records.
Hope this help
RE: Practical way to get Impeller Diameter
Naresuan University
Phitsanulok
Thailand
RE: Practical way to get Impeller Diameter
RE: Practical way to get Impeller Diameter
"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut."
-- by Albert Einstein
RE: Practical way to get Impeller Diameter
RE: Practical way to get Impeller Diameter
Use a fiber optic boroscope through any or all of these access points with the pump off and drained. Calibration of the sight would be done using a mock up to see the gap between the impeller edge and the volute casing or diffuser.
If you can also look at the eye and edges of the vanes for cavitation damage that would be helpful and might be the cause of the question.
Hydrae