Originally Posted by mattd2
I would say that the last 2 are the same nozzle. And the Mcmaster one seems the cheapest @ >$50.
What pump are you going to use to power this? That is where I would be starting - then get the pump curves/charts and the spray ball charts and see what the actual flowrate, pressure and spray diameter will be.
The 1st spray ball seems to require more flow at higher pressures than the 3rd, which a smaller pump may struggle to provide. Although the 2nd and 3rd option seem to disagree with the pressure/flow data?
Thanks for the response!
I agree the that last two look like the same nozzle, though the pressure/flow data seems a little different. You're right that the mcmaster is the cheapest, but it's also 3/16" wider than the smallest GWKent model. (It could have been a measurement error, but it looks like one of my carboy necks is 1/16" too narrow for the mcmaster.) That said, I'm happy to pay the extra $5 for the smaller GWKent version, if there isn't any (functional) reason not to.
I'm not sure I see much difference in flow rate or PSI requirements between the GWKent models. I'll outline them here:
TWK (smallest, preferred)
PSI >= 5 to spin
PSI 20-80 (operating)
Flow: 2-7 GPM
Whirling (similar to mcmaster)
PSI >= 5 to spin
PSI 20-60 (operating)
Flow: 2-4 GPM
It's true that the larger GWKent model requires less on the high end, but my pump will be on the low end anyway, so I don't think it makes any difference - unless I'm not considering something.
The pump I'm looking at is a PowerFlo 7800
. It looks like it will do 2GPM @ 60PSI. The max temp is 150*, and it can handle chemicals, so PBW shouldn't be any problem for it.
So it looks like this pump will (barely) handle it. I've looked all over for pumps, btw, and haven't really found many that are
(b) can handle temps around 115*
(c) can handle chemicals
(d) are even close to the the PSI/GPM ratings.
If you have any pointers on better equipped pumps, I'm all ears for those too.