Register free!


Reply
 
Thread Tools   Display Modes
  #1  
Old 09-26-2011, 11:32 PM
regularguy's Avatar
regularguy regularguy is offline
LawnSite Member
 
Join Date: Jul 2003
Location: Seneca, Illinois
Posts: 152
Brass or Plastic

For pump impellers.

I believe that this subject may have been touched upon briefly before, but I guess that I am interested in everyones opinion on which is the best pump impeller material type for the money? I have a couple of the following pumps and one of them is in need of a rebuild.

http://www.wwpp.com/products/flint-a...epairparts.pdf

The pumps are Flint and Walling 2 horse 3 stage pumps and they came with brass impellers. The pump in question was torn down 2 years ago and I had a machine shop build up the impellers and I replaced the wear rings, it needs it again and this time I think I will replace the brass impellers, but there are 3 impellers and they cost about $125 each, with the rest of the stuff that brings the price of the rebuild to a little more than $500. Plastic impellers are less than half of the cost of brass and the performance is the same. I'm sure that they wouldn't last as long as the wear rings would still be brass, maybe the wear rings would last longer - that would be a good thing. I am concerned that the plastic impeller may wear out really fast and require much more frequent maintenance and in that case the savings may not be worth the hassle, but I am very interested in others thoughts and experience on this subject.
Reply With Quote
  #2  
Old 09-27-2011, 12:02 AM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 40,588
how much sand are you pumping
Reply With Quote
  #3  
Old 09-27-2011, 12:48 AM
regularguy's Avatar
regularguy regularguy is offline
LawnSite Member
 
Join Date: Jul 2003
Location: Seneca, Illinois
Posts: 152
Quote:
Originally Posted by Wet_Boots View Post
how much sand are you pumping
I don't think I am pumping too much sand. The water comes from a series of shallow driven wells and I use smaller centrifugal pumps to draw the water from the wells and then pump it to the larger pumps to boost the pressure, the smaller pumps have plastic impellers and I have had them torn down before and was surprised at how little wear the plastic impellers had shown, that actually was what got me thinking about changing out the brass and switching to plastic.
Reply With Quote
  #4  
Old 09-27-2011, 07:31 AM
jvanvliet's Avatar
jvanvliet jvanvliet is offline
LawnSite Gold Member
 
Join Date: Aug 2009
Location: South Florida
Posts: 3,935
I have centrifical pumps (Gould mostly, 1.5 HP & up) sucking (lots of dirty) water for years without wearing down the impellers, some as many as 20 years. I'd wonder what is wearing down your impellers that you need them built up after a couple of years.
Reply With Quote
  #5  
Old 09-27-2011, 11:30 AM
regularguy's Avatar
regularguy regularguy is offline
LawnSite Member
 
Join Date: Jul 2003
Location: Seneca, Illinois
Posts: 152
Quote:
Originally Posted by jvanvliet View Post
I have centrifical pumps (Gould mostly, 1.5 HP & up) sucking (lots of dirty) water for years without wearing down the impellers, some as many as 20 years. I'd wonder what is wearing down your impellers that you need them built up after a couple of years.
The pump is probably ten years old and a couple of years ago I tore it down and had the impellers built back up and replaced the wear rings, at that time it was in pretty rough shape and showed a lot of wear. I had a machine shop do the brass work and I'm not sure that what I did was the best way to do the repair, I always thought that it was a little louder when it ran after that. I guess that I got about 8 years out of the pump when it was new, I thought that was a pretty acceptable life from the pump, I don't utilize a flow meter but my irrigation software calculates water useage based on flow multiplied by time and I usually average about 1.5 million gallons per year, some years more and some less based on the weather.
Reply With Quote
  #6  
Old 09-27-2011, 05:12 PM
jvanvliet's Avatar
jvanvliet jvanvliet is offline
LawnSite Gold Member
 
Join Date: Aug 2009
Location: South Florida
Posts: 3,935
Quote:
Originally Posted by regularguy View Post
The pump is probably ten years old and a couple of years ago I tore it down and had the impellers built back up and replaced the wear rings, at that time it was in pretty rough shape and showed a lot of wear. I had a machine shop do the brass work and I'm not sure that what I did was the best way to do the repair, I always thought that it was a little louder when it ran after that. I guess that I got about 8 years out of the pump when it was new, I thought that was a pretty acceptable life from the pump, I don't utilize a flow meter but my irrigation software calculates water useage based on flow multiplied by time and I usually average about 1.5 million gallons per year, some years more and some less based on the weather.
I wouldn't complain about eight years, I thought you said you just had it done about two years ago.

Anyway, we run the water all year long and I haven't had to replace or rebuild any impellers... yet (motors yes, impellers no) and we suck a lot of dirty water.

I'm still wondering what abrasive is suspended in your source that would wear down an impeller in two years, and a brass one at that. I'd check the well, down here shallow wells are dirty.

Don't want to get into a pi$$ing contest at all, I'd look at the source and maybe consider a self cleaning particulate filter. Somebody on here had a link to a submersible type, maybe he'll post here.

Last edited by jvanvliet; 09-27-2011 at 05:14 PM. Reason: typo
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump






Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 12:45 AM.

Page generated in 0.08308 seconds with 7 queries