pvtschultz
Well-Known Member
I'm not sure how well those brushless motors can be slowed down. Might be better off putting a valve on the discharge side to regulate flow.
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well I am sure because its been mentioned by myself and others going pretty far back in this thread who use them. If you read some of the thread you will see they do work fine.I'm not sure how well those brushless motors can be slowed down. Might be better off putting a valve on the discharge side to regulate flow.
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ok finally got my PWM.
That's one of the pictures on amazon. Is the left two the power cord and the right bundle from the pump?
I've got a question for someone who knows a LOT more than me about motors and pumps. I found these two pumps on eBay
This one...
http://www.ebay.com/itm/121312406089?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT
and this one...
http://www.ebay.com/itm/380857777247?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Specs on the pumps are very similar and I've done some additional digging on the Internet for more information which brought me to this page...
http://www.dcbrushlesspump.com/Brushless-DC-Pump(DC40C)-p29.html
From the looks of things, the difference between the two pumps is that one is 2-Phase and one is 3-Phase (and comes with a PWM speed controller). The 3-Phase version handles higher temps but seems to be pretty much identical otherwise.
So, are both of these the same pump - one with a PWM and one without? Or are the internals different on the pumps?
Can someone put a stickie together for this pump? Or a new thread....I want to get one but this thread is forever long. I see people have used a PWM. Why? Control flow rate? Can someone post a complete build? Before and after and maybe it working on their brew day. And info that helps keep this pump in good working order for a long time. I've never had a pump but a buddy told me he has to prime his pump....I don't even know what that means but does this one need to be primes. CHEERS and Thank you ahead of time.
This thread is kind of organic, no real builds to post, just talking about our experiences.
Priming a pump means that liquid must get to the pump, fill up the pump, before it will start to work. In other words, it will not suck liquid up out of your pot, it must be lower than pot so that you let liquid flow down into the pump before you turn it on. (Self priming pumps are very expensive and they will actually pull liquid up hill and into themselves.)
If you have never had a pump, do not worry about the pulse width modulators...PMW...that is over kill really and these tiny pumps really don't need a whole lot of speed control, which is what makes them perfect for small batch brewing. If you really really want to control flow...just put a ball valve on the hose coming out of the pump and TADA! you have flow control.
(ps...none of the people who have gotten a PMW have reported back that it works anyway. Most people say these pumps are not the right kind of motor and it won't work.)
If you have never had a pump, do not worry about the pulse width modulators...PMW...that is over kill really and these tiny pumps really don't need a whole lot of speed control, which is what makes them perfect for small batch brewing. If you really really want to control flow...just put a ball valve on the hose coming out of the pump and TADA! you have flow control.
(ps...none of the people who have gotten a PMW have reported back that it works anyway. Most people say these pumps are not the right kind of motor and it won't work.)
I recently bought 2 of these pumps: http://www.ebay.com/itm/230918742543?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
.
That's what I have, two of them. Only used them for mash recirc so far and I can say they will spit out any grain that gets past my BIAB without clogging. I am planning to use a whirlpool in my next build...which I should be working on now and not taking a long lunch typing here.
I have a US Solar Pump with the stainless fittings. The CPC disconnects that I use are lighter, but I'm 17 batches in with it hanging off the MLT and no problems.. . .is there a risk that the weight of the pump and fitting will put too much strain on the weldless kettle fitting? Thanks!
In post 633, dirkomatic shows his pump taken apart. This looks like the us solar/topsflo pump. These both advertise that they are food safe and specifically mention brewing applications. However, the picture looks like the magnet is uncoated, unlike the coated magnet in the little tan pump. Is an uncoated magnet like this really food safe?
I'd like to order one of these off amazon since I have so many gift cards, but I want to make sure it's safe first.
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I guess another question might be: would putting some silicone sealant on the magnet cause other issues?
This is what I was thinking, just a thin coat of food grade silicone over the magnet, but I'm also not sure how that will affect the pump performance.
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For an extra $30, the one from great brew eh is for sure food safe. If it doesn't say food safe, why take the risk?
It's a coated magnet.
I don't have one of these pumps, but if it's like most mag drive pumps, putting anything on the magnet won't work. There is very little room between the magnet and the pump housing. Anything on the magnet could cause it to bind up, or worse.I guess another question might be: would putting some silicone sealant on the magnet cause other issues?
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