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Old 05-09-2012, 07:54 PM   #341
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Originally Posted by WalterAtMarchPump View Post
its hard to say....with the air motor we get that crazy curve due to the fact as you move to the left of the curve (against more head) the rpm's of the motor increase and can get some where in between 4000-4500rpm before the magnets de-couple, and thats why we get that 50' of head height out of the pump.....but thats with water...a heavier liquid will decouple the magnets at a lower rpm.
With electric motors they more or less stay at a constant rpm and dont go above 3450rpm. With your VFD you should be able to ramp it up to the same 4k+ rpms and get the same performace as the air motors...easiest thing to do is ramp it up till it decouples...turn it back a hair and mark it....shut the motor down and let the magnets re-align....then restart and it should be fine right there.
Thanks a lot!
Good to know the only issue is decoupling of the magnets, and no damage to shaft or bushings.
I painted the mag-drive coupler white and black in 4 quadrants so I can measure RPM using a model airplane tacho. Works brilliant as the motor adapter on this pump has cut-outs so the coupler is visible.

This will be a kick-ass pump for my 100 liter (26G) electric brewery!

Thanks again!
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Old 05-11-2012, 11:51 PM   #342
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Is there any issue of mounting the pump, so the actual mounting bracket is vertical, not horizontal? I've seen plenty of heads mounted vertically, with inlet on bottom and output on top, but is there a problem when the actual body of the pump is vertical? Basically I mounted the pump to a leg of my brew stand. I don't see any issues, but I figures I'd check.

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Old 05-14-2012, 01:03 PM   #343
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Is there any issue of mounting the pump, so the actual mounting bracket is vertical, not horizontal? I've seen plenty of heads mounted vertically, with inlet on bottom and output on top, but is there a problem when the actual body of the pump is vertical? Basically I mounted the pump to a leg of my brew stand. I don't see any issues, but I figures I'd check.
You can mount the pump verticaly...but the pump head needs to be on top of the motor. If you refer to another posting i made about pump orrientation you will see when the pump head is below the motor then you trap an air pocket in the rear housing. The pump will move liquid but the back end of it will be running dry in that air pocket and eventually cause you problems.
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Old 05-14-2012, 01:32 PM   #344
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You can mount the pump verticaly...but the pump head needs to be on top of the motor. If you refer to another posting i made about pump orrientation you will see when the pump head is below the motor then you trap an air pocket in the rear housing. The pump will move liquid but the back end of it will be running dry in that air pocket and eventually cause you problems.
I saw that one, thanks. Ya the output is on the top.
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Old 05-22-2012, 02:35 PM   #345
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Hi Walter,

I'm looking for a brewery pump to help with cellaring -- beer transfers (200+ litres) and cleaning via a spray ball.

So far, what I have is MoreBeer's H325 while a local reccomended the 809-SS-HS-C-115V.

Given that a quick Google has both pumps for about the same $$$, which would you recommend? My gut tells me the H325, but I'd like a sober second opinion.

Thanks!
Jason

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Old 05-22-2012, 02:48 PM   #346
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I do not think the 809 will function with a sprayball very well, a 325 does OK on my spinning, keg-cleaning sprayball I got from St. Pats, but I really like the way a TE-5 march pump spins it for CIP... For CIP, a TE-5x-MD will work great, and a TE-5.5x-MD is awesome...

Interested to see what Walter says...

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Old 05-22-2012, 07:54 PM   #347
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It will all depend on what that spray ball needs to operate properly...if you can get me the specs for it i can help you. See if they tell you what the psi it needs or GPM it needs to opperate properly....thanks

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Old 05-22-2012, 08:34 PM   #348
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here is the info for the St. Pats one I have:

http://www.stpats.com/oakbarrels.htm#beerkegtools
Barrel Cleaning Nozzle $69
304 Stainless Steel.
3/4" FPT.
Outside diameter 1.4"
Spins best in vertical position (either up or down).
Pressure/Flow: 20-40 psi and 8-15 GPM


other sprayballs are pretty much our of our league:
http://www.stpats.com/TankAccessories2.htm
Revolving Spray Ball $79 in stock

1.5" Tri-Clamp connection.
2 " Diameter ball.
304 stainless.
Pressure: 30 psi
Flow: 50 GPM
Cleaning diameter: 8'

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Old 05-22-2012, 08:58 PM   #349
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If it needs 20psi to work then none of these pumps will do the trick....this is territory for our 320 and 335 pumps as far as pressure goes....the 809's will fall short.

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Old 05-24-2012, 03:44 PM   #350
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I have an older march pump - model just says mdx - will I be able to use it to pump hot wort? Also - it seems to have hard plastic on it - does that need to be replaced with metal, and if so, what would the part number be?
Thanks!!

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