Can't "DO THE MATH"

Having read many posts on this board, I've learnt many aspects apply when purchasing and upgrading equipment.

Case in point is that of, what to purchase for a pump. When faced with the facts, I haven't yet been able to make a clear distinction as to which is the more profitable route. The latest conundrum has to do with pump size and gas engine hp required to run it. If a pump is rated at 3000/8.0 and requires a 22 (21.83) hp gas engine to run it, but only has an 18 hp engine attached to it, what will the resulting CP be? My choice has come to that pump and a smaller one (2500/7.1) which actually falls into my existing 18-hp range. Is it wiser to purchase the larger capacity pump and hope that its performance will at least rival the lesser pump (and maybe upgrade the engine in the future)? Or is it wiser to stay within the prescribed specs for both pump and engine (would I otherwise risk damage to the engine trying to power the bigger pump)? All this is in relation to a belt-driven system.

Thanx for your time,

------------------
GBU

Mark A. Dadian

Mark,
I sent you an email about the pump sizing. Another question: Do you have more than one unit? Also keep in mind that your burner was only intended to heat 6gpm. I would try to find a 6.5gpm pump@3000psi. Udor model GKC 7.0/35-s would be a good choice or an Admiral xd-3065. Still can't beat a General TS2021 but its only good for 5.6gpm.

Hope I could help.

Daren Marshall


------------------

<FONT COLOR="e87400">Hey Mark

I would be more concerned about staying within the specs of your water supply,,Myself I would not get a pump that needed more than 6gpm. Anything more and I would have to run off a tank half the time!

Cody</FONT c>

------------------
<FONT COLOR="e87400">
Hydro-Emulsification Surface Preparation Specialist </FONT c>

By changing the rpm to a lower than required you change the flow output. Getting the right ratio is the hard part. I am working on a simple to understand formula that explains how in english so anyone can understand how to "DO THE MATH"

------------------
Hotwaterwizard@aol.com If You have a problem with your machine, just ask me for help. Check out the Machine Problem Board

Thank you one and all for your help. I wondered about the flow through my burner. How do you know that it is only designed to do 6 gpm, is that an industry standard? Not contradicting, just had this question for some time on my own.

------------------
GBU

Mark A. Dadian

It takes roughly 100,000 BTU's to handle 1gpm. If I remember right the Elite skids are 440,000 btu's. These machines are sized to handle 5gpm. It should give you around a 130deg temp rise at 5gpm. It also depends on how the coils are wrapped, how many pancake coils are in burner, fuel pressure, nozzle size. You might be able to increase output of heater but please make sure a reputable shop does this or very bad things can happen. Mark I had mentioned that the Elite was capable of heating 6gpm but was incorrect. I was thinking of the TUFF brand. They use a 660,000 btu heater.

Hope I could help.

Daren Marshall


------------------