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Old 12/23/2017, 05:42 PM   #2601
scuzy
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I don't see why you can't but I also thinks the screw in had more strength invade pressure builds up.


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Old 12/23/2017, 05:43 PM   #2602
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I see your logic but you are still connecting a barbed fitting on both scenarios.


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Old 12/24/2017, 07:40 AM   #2603
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Originally Posted by Joshsmit56001 View Post
Could you use these to switch from Ls tubing to 1/4" RO tubing?

https://www.bulkreefsupply.com/mur-l...hose-stem.html

You could this and a coupling. Seems easier than the other connectors that have been mentioned.

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Sure, it would work fine. It's still a two piece connection though. The smooth side on that barb is a push to fit so it would still need to go into a john guest style push to fit connector. In the end it's basically the same.


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Old 12/24/2017, 07:42 AM   #2604
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Anyone know a place to buy brush's cheap?


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I haven't tried but ace hardware has a large selection. I would try there first.


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Old 12/24/2017, 07:45 AM   #2605
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Thatís weird... the links seem to be broken. I literally used them a week ago to order new tubing and parts.

L/S 17 equivalent tubing...
https://www.usplastic.com/mobile/cat...x?itemid=25534

Barbed adapter for the quick connect fitting...
https://www.usplastic.com/mobile/cat...x?itemid=36204

Quick connect fitting...
https://www.usplastic.com/mobile/cat...x?itemid=42009

Hose clamps...
https://www.usplastic.com/mobile/cat...x?itemid=34082
Thanks, i just used them last week too. So it must have just been changed...


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Old 12/24/2017, 07:50 AM   #2606
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Sure, it would work fine. It's still a two piece connection though. The smooth side on that barb is a push to fit so it would still need to go into a john guest style push to fit connector. In the end it's basically the same.


A simple John guest coupling would work fine


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Old 12/24/2017, 03:46 PM   #2607
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Could you change a 100 rpm pump to a 600 rpm by just swapping the gear? I have a pump that is loud that is 600 rpm and I found a cheap new 100 rpm pump to swap with if possible.


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Old 12/24/2017, 04:06 PM   #2608
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Could you change a 100 rpm pump to a 600 rpm by just swapping the gear? I have a pump that is loud that is 600 rpm and I found a cheap new 100 rpm pump to swap with if possible.


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Brushed motors tend to be loud regardless of their RPM. If you find a 100 rpm pump that is the same (looks the same) as your 600 RPM pump, I am pretty sure you can swap the motor over to the 600 rpm one but unless the bearings are bad in your 600 rpm motor, the noise you are hearing is likely normal and or the result of the gears themselves. As such, swapping the motor over will likely not solve the noise issue.


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Old 12/24/2017, 04:08 PM   #2609
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Brushed motors tend to be loud regardless of their RPM. If you find a 100 rpm pump that is the same (looks the same) as your 600 RPM pump, I am pretty sure you can swap the motor over but unless the bearings are bad in your 600 rpm motor, the noise you are hearing is likely normal and or the result of the gears themselves.

It's a loud hum that is the noise at all RPM's. Would replacing brushes make any difference?


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Old 12/24/2017, 04:31 PM   #2610
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I asked a CP engineer about swapping between 100 and 600rpm. He said it was more than just gearing and couldn't be converted. I've never opened up a 100rpm model to compare gearsets however if you open up a 600rpm model it doesn't look like there would be enough room to physically fit a gear that would convert a 600rpm drive to a 100rpm drive.


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Old 12/25/2017, 05:18 PM   #2611
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Anyone know much about the Cole Parmer Pro-Spense? I canít really find much info out there such as RPM/brushless/etc


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Old 12/25/2017, 05:35 PM   #2612
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Anyone know much about the Cole Parmer Pro-Spense? I canít really find much info out there such as RPM/brushless/etc


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They're not peristaltic pumps. They use a syringe to dispense small volumes accurately


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Old 12/27/2017, 09:09 AM   #2613
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I was inventorying and I have too many backups that I shouldnít!!
I just listed couple of brushless pumps on the selling forum.


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Old 12/31/2017, 08:49 PM   #2614
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programming question within the masterflex pump. I have the 7523-60 and I thought it can dispense 0.6ml/min-3400ml/min but I cannot get it below 30ml. What am I doing wrong?

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Old 12/31/2017, 08:51 PM   #2615
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programming question within the masterflex pump. I have the 7523-60 and I thought it can dispense 0.6ml/min-3400ml/min but I cannot get it below 30ml. What am I doing wrong?

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All depends on the tubing you are using. Which tube do you use?



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Old 12/31/2017, 08:56 PM   #2616
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All depends on the tubing you are using. Which tube do you use?



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24

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Old 12/31/2017, 08:59 PM   #2617
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24

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My quick loader takes 16, 24, 35, 36. I'm using original masterflex 24 tubing

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Old 12/31/2017, 09:02 PM   #2618
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Old 12/31/2017, 09:38 PM   #2619
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How many rpm drive is that one?


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Old 12/31/2017, 09:49 PM   #2620
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How many rpm drive is that one?


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10-600 rpm

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Old 12/31/2017, 09:54 PM   #2621
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Odd the Cole Parker site lists 24 tubing to be

17ml/min per that doc.


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Old 01/01/2018, 12:19 AM   #2622
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Odd the Cole Parker site lists 24 tubing to be

17ml/min per that doc.


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Thank you for that info and yes minimum should be 17ml/min. Cannot get it below 30

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Old 01/01/2018, 12:37 AM   #2623
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I have emailed them. Hopefully I will get an answer.

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Old 01/01/2018, 09:20 AM   #2624
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Doc says 17 at 6 rpm. Lowest he can go is 10 RPM. Could be the difference.


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Old 01/01/2018, 09:44 AM   #2625
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Thank you for that info and yes minimum should be 17ml/min. Cannot get it below 30

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Doc says 17 at 6 rpm. Lowest he can go is 10 RPM. Could be the difference.


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You hit the nail on the head.

His pump is a 10-600 RPM motor, not a 6-600 RPM. That head flows at 2.8 ml per revolution with LS24 tubing. At 10 RPM minimum on his pump, that is 28 ml/min minimum with LS24 tubing on that pump.

LS-15 tubing is 1.5 ml per revolution which would get him down to a minimum of 15 ml/min. Seems a change of tubing is in order if the target flow is below 28 ml/min.


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