wife no likey
New member
forget it. . .problem solved.
being an idiot.
Pete
being an idiot.
Pete
Variable flow Iwaki MD-100
- Thread starter buck50bmg
- Start date
So, just curious about your plans, as there seems to be a sudden influx of VFD/3 Phase experiments...
I saw a mention of continuing to use a 4-way for random flow, and only using the VFD driven pump for a feed cycle?
Are both of these on returns, versus a closed loop?
And if one of them is on a loop, I'd be curious to hear your result of flow in the tank varied by force, rather then outlet.
I saw a mention of continuing to use a 4-way for random flow, and only using the VFD driven pump for a feed cycle?
Are both of these on returns, versus a closed loop?
And if one of them is on a loop, I'd be curious to hear your result of flow in the tank varied by force, rather then outlet.
buck50bmg
In Memoriam
Thanks to Pete I was able to complete the upgrade. Pete helped me with the idea of using a Tunze 7091 single controller to control the 0-10vdc external input that most VFD's have. Its working great!
Im going from 40hz to 45hz every 20 sec on my return pump. It is quieter than my MD-55 I had there before. I can hear a little whine but nothing I cant deaden with some foam. Most of the noise will be from the fan on the back.
Having a Iwaki MD-100 (3 phase) on a 125 gallon reef may be overkill, but with a VFD I can tweak the flow anyway I want. So normally we run all of our pumps at 60hz on a single phase system. Using single phase 220vac and a VFD that accepts a single phase input, I can lower the freq going to the motor (pump) thus lowering the rpm and flow rate. Another bonus is the ability to increase the freq above the 60hz rating without any damage to the motor at the cost of torque. You can safely go to 90hz without any negative results and increase flow by 50%!!!!! Also efficiency goes up.
Now the drawbacks. VFD's can be hard to find in the single phase type. VFD's can be expensive (look at ebay). Getting a 3 phase pump (motor) can be difficult on some pumps (again ebay) You will need a 220v line to supply power to the VFD.
There is alot of room to devise different ways to control and use these drives and I cant wait to see them.
Im going from 40hz to 45hz every 20 sec on my return pump. It is quieter than my MD-55 I had there before. I can hear a little whine but nothing I cant deaden with some foam. Most of the noise will be from the fan on the back.Having a Iwaki MD-100 (3 phase) on a 125 gallon reef may be overkill, but with a VFD I can tweak the flow anyway I want. So normally we run all of our pumps at 60hz on a single phase system. Using single phase 220vac and a VFD that accepts a single phase input, I can lower the freq going to the motor (pump) thus lowering the rpm and flow rate. Another bonus is the ability to increase the freq above the 60hz rating without any damage to the motor at the cost of torque. You can safely go to 90hz without any negative results and increase flow by 50%!!!!! Also efficiency goes up.
Now the drawbacks. VFD's can be hard to find in the single phase type. VFD's can be expensive (look at ebay). Getting a 3 phase pump (motor) can be difficult on some pumps (again ebay) You will need a 220v line to supply power to the VFD.
There is alot of room to devise different ways to control and use these drives and I cant wait to see them.
wife no likey
New member
I'm using mine to swap out my current CL pump/motor.
Right now I have an Iwaki mdh-401 w/ a 1/6hp 1725rpm baldor single phase - it's been running without a cleaing for two years now and I wanted to get something setup to switch it with.
with this setup, I'm going with a finish thompson kc11 head w/ a .25hp 1200rpm Lincoln motor.
http://www.finishthompson.com/products/centrifugal-pumps/model?m=KC10&series=KC
As I said earlier, I had originally planned to just use the photocell function w/ the 7091, but it seems to be working so damn good w/ the pulse signal, I think I'm going to try that out first thing.
It should be pretty sweet w/ 2 OM's in addition to varying motor speed from about +/- 40hz or so.
On my drive, I have things setup to go up to +70hz, so with the max 8v signal we are getting from the tunze and a base 1200rpm 60hz motor, I figure that I can max it out at appx 1800rpm or so.
I just need to get the last fittings I need to make the swap clean -so I'm thinking that next week end will be the "go-live"
Pete
Interesting... that's the first 56C framed wet end I've seen.
(which opens up a whole range of motor possibilities compared to 56J framed wet-ends)
Are you swapping out the motor on a complete pump, or were you able to just source the wet-end?
Also, did you find any other 56c wet-end options in your research?
thanks!
~K
(which opens up a whole range of motor possibilities compared to 56J framed wet-ends)
Are you swapping out the motor on a complete pump, or were you able to just source the wet-end?
Also, did you find any other 56c wet-end options in your research?
thanks!
~K
wife no likey
New member
well I've been running an mdh-401 for the last two years:
http://www.iwaki.nl/pdf/brochures/MDH brochENG.pdf
luckily, I've scored both of them off of ebay just as wet ends for about $50 each.
. .personally, I don't really trust "close coupled" pumps, and only use mag drives - seals are a ticking time bomb IMHO.
http://www.iwaki.nl/pdf/brochures/MDH brochENG.pdf
luckily, I've scored both of them off of ebay just as wet ends for about $50 each.
. .personally, I don't really trust "close coupled" pumps, and only use mag drives - seals are a ticking time bomb IMHO.
wife no likey
New member
<a href=showthread.php?s=&postid=12126512#post12126512 target=_blank>Originally posted</a> by buck50bmg
Thanks to Pete I was able to complete the upgrade. Pete helped me with the idea of using a Tunze 7091 single controller to control the 0-10vdc external input that most VFD's have. Its working great!
. . .more like thanks to you for getting the right pinout.
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