Pump Impeller Spin Test : How do we do it ? What is its purpose?
Pump Impeller Spin Test : How do we do it ? What is its purpose?
(OP)
Hi,
I am currently going to modify an existing pump to enhance its process capabilities (increased impeller diameter).
There is a requirement from Client for a "Spin Test" for the impeller.
Can anyone enlighten me on what does a spin test for an impeller is for and how do we normally do it.
I suppose that it is not the same as impeller balancing.
Thanks in advance
I am currently going to modify an existing pump to enhance its process capabilities (increased impeller diameter).
There is a requirement from Client for a "Spin Test" for the impeller.
Can anyone enlighten me on what does a spin test for an impeller is for and how do we normally do it.
I suppose that it is not the same as impeller balancing.
Thanks in advance





RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
normally done by "flicking" the motor on then immediately off and watching the rotation of the shaft, so it might need the shaft guards or coupling guards to see clearly which direction it goes.
I might be wrong and its a pump thing, but if that fits in then give it a try.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
If artisi doesn't know then it's not a known thing in the pump world.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
Thanks for the inputs.As additional info, i will only purchase a new impeller and install it on the old pump.I have given all the requirements for the impeller like balancing requirement,NDE requirement etc but spin test was requested by Client for the impeller alone.Would ask Client what he really mean about this test.Just want to get some inputs prior to talking to him.
From the web i've seen some explanation of spinning the impeller to 115% of its rated speed :
http://www.piller-tsc.com/index.php?id=11
I just dont know if i can really apply this to my impeller and if it really has its merit.
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
Johnny Pellin
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
The pump is small around 370 kW and the speed is only 1500 rpm.
So this means that "spin test" can also apply even if my pump is in a constant speed? Even if it not suppose to run at any other speed higher than that? Or it can only be applied for those impellers which runs on variable speed like compressors and turbines?
Thanks
Kristian
RE: Pump Impeller Spin Test : How do we do it ? What is its purpose?
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)