pump selection (HELP)

[Gull Maint>]

HI

I'm John and I just found this sight about 2 weeks ago.Great idea whom ever started it.

OK my question is for anyone/everyone who cares to answer. I have run highpressure pumps from belt/pulley and gear reducers and I'm happy with both.I wanted to try running some of the direct to engine mount 3400 rpm pumps.

If you have had any experience with these mainly gen/interpump or comets, I welcome your input. Good or bad I'd like to know.I'm considering the 4000 psi 4 - 4.5 gpm s.

I appreciate any and all comments

Thanks

John (Gull Maint>)

 

[Ron Musgraves]

John, I'm glad you like the BB.

I did start it but you own a piece by becoming a member. I believe we all own this board and should call it our own. So when you’re inviting others to attend welcome them to your BB.


On the subject of pumps, I prefer the t 2021 bye general because I have had good luck with them. The parts a cheap & the pump are inexpensive.


Some will tell you cat will last longer and is a better pump. That’s what I have heard over the years. Never owned one.

I have had many pieces of equipment but have been using the general for over 18 yrs.

 

[Hotwaterwizard]

Direct Drive VS Bely Drive
Direct Drive VS Belt Drive
Direct drive for a home owner is Great!
For a Contract Cleaner it Sucks!
Here is why.
Think about the concept of Direct drive.
You have a Engine that spins at 3400 Rpm coupled to a pump direct.
What if it breaks?
What will happen to the Engine if the pump siezes up?
Will the Engine throw a rod as well?
How about the heat exchange from the Engine to the pump?
Will that dammage the oil seals?
How about the wear on the packings?
Something moving that fast is going to cause alot of heat from friction.
The valves are opening and closing at the same speed.
All of the parts are subjected to faster wear and heat.

Now with a belt drive, the pump turns at 800 to 1450 RPM.
with no heat transfer from the Engine and if the pump breaks the belt slips. The parts will last alot longer because of the lower RPM, friction and, temp. These pumps are also bigger and constructed for more durability.
You decide which is better.

 

[Hotwaterwizard]

Surface Cleaning?

 

[Dave Olson]

Belt drive for sure. 3000 psi is enough and the component parts are less expensive than for a 4000 psi system. Suggest you try to get a larger volume pump (at least 5 gpm).

Our primary pump operates at 485 rpm (1-1/4" plungers). Output is a little over 9 gpm with variable pressure up to 3000 psi. We just replaced the fluidend after 10 years of use.

Dave Olson

 

[Gull Maint>]

Thanks people I appreciate all the help/advice.

John Gull Maintenance Corp