Pump size designation 2

[piaengr]

I am embarrased to ask this question that is likely extremely easy. But for a pump designated as 6x8-13, what do these numbers stand for? I am guessing the 6x8 are flange sizes, but what about the 13? Sorry for a question that I think I should know but have not found an answer and hope one of you can help me out. I apologize for what is probably a basic question.

 

[Zapster]

8" suction
6" discharge
13" impeller

 

[piaengr]

Thank you Zapster for the help.

 

[Artisi]

Be careful, the 13" is a nominal impeller diameter - in real life the full size diameter could be above or even below this, check the data sheet / pump curve / manufacturer to be sure.

 

[BillBirch]

I thought that the 13" would be the largest size impellor for that casing.

 

[Artisi]

Most pump series designated by sizing - for example ANSI 8x6x13 - 3x2x11 or DIN 200x150x350 etc are designed around a dimensional standard for shaft centre height and flange sizes and positioning etc and not a hydraulic standard, therefore it is possible that heads, flows and power can vary between manufacturers - therefore impeller geometery can also be different.

 

[khardy]

A slight clairification: the last number is the maximum impeller size that pump can take. The actual impeller is likely trimmed down for the specific application. Thus a 6 X 8 X 13 would have an 8" suction, a 6" discharge, and could take up to a 13" diameter impeller.