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Topic: Peristaltic pump - tube feeds through the pump (Read 1 time) previous topic - next topic

briansone

I bought these pumps off Ebay & am powering them with my Uno. 

Peristaltic pump link


The unexpected problem is that the tube slowly feeds through the pump head.

Surprisingly I can't find much on the net about the problem so I'm buying some unsightly tube clamps.  Surely there must be a more elegant solution & why don't others have this problem?

Any ideas anyone?

terryking228

Hi,
I use a similar pump (HERE) to feed chlorine (AKA Walmart Bleach) to my swimming pool. It has not had that problem, and the tubing runs through two narrow points.

Yours should be easy: use a "zip tie" (originally Thomas&Betts 'tyrap') on the input tubing. Or put some silicone caulk on it.
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Paul_KD7HB

Hi,
I use a similar pump (HERE) to feed chlorine (AKA Walmart Bleach) to my swimming pool. It has not had that problem, and the tubing runs through two narrow points.

Yours should be easy: use a "zip tie" (originally Thomas&Betts 'tyrap') on the input tubing. Or put some silicone caulk on it.
Terry, I have always wondered about the life of the tubing in such a pump. What is your experience and does CL degrade the tubing any?

Paul

CrossRoads

Silicon tubing? I would suspect CL would not have an impact.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

terryking228

Hi Guys,
Quote
life of the tubing in such a pump
I have had these pumps last a season or almost 2, mounted outdoors but taped up well.  Typical run is 3 minutes twice a day, tuned up a little during the season to keep the free chlorine between 2 and 4 ppm.  I am pumping Walmart Bleach diluted 1:1 in a 5 gallon bottle like a office drink dispenser. Works fine for me, and compared to more pro pumps at almost $100 I can afford to replace one once in a while; I do keep a spare.

The Swimming Pool chemical maze can be totally avoided. See the free online calculator HERE I now set up at the beginning of a season with the right amount of borax, baking soda, stabilizer and then Muriatic acid to get pH right. After that all season nothing but bleach. Clear water, no algae, no chlorine smell, no problems. Just NEVER let the free chlorine get below 1ppm. Tell the pool store guy you don't need any of his stuff.  Also see Info HERE

Sorry for the rant, but I had such pool hassles in the OldDays.  This was done by a bunch of guys who said, "Wait... We're professional Chemists. We have Pools. We understand this stuff.".    Open Source Pool Info.

Oh, my Mega not only runs the chlorine pump, but the solar pool heater pump, and the filter pump. And tells us the air and pool temperature.  

Surprisingly, Terry digresses...
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Boardburner2

#5
Apr 13, 2017, 03:47 am Last Edit: Apr 13, 2017, 03:50 am by Boardburner2
I bought these pumps off Ebay & am powering them with my Uno.  

Peristaltic pump link


The unexpected problem is that the tube slowly feeds through the pump head.

Surprisingly I can't find much on the net about the problem so I'm buying some unsightly tube clamps.  Surely there must be a more elegant solution & why don't others have this problem?

Any ideas anyone?
It is a cheap pump.
Tube feed should not normally be a problem and a commercial pump should make tube replacement easy.
Commercial dosing pumps can cost 100s, Using clamps or tie wraps would seem to be a practical solution.  

Terry, I have always wondered about the life of the tubing in such a pump. What is your experience and does CL degrade the tubing any?

Paul
You pick the tube to suit the chemical.
It is generally cheap and easy to replace,i would not have thought that chlorine water would be a problem for silicone tube though.

briansone

Thanks all,

I've attached some zip ties & ordered some clamps as it still slips a bit through the zip tie (about a cm an hour when fully on).

Incidentally it's also for a pool project & was wondering about the chlorine/tubing combo, great to know they'll work together.

The other thing i'd always wondered about, which guessing by your post Terry isn't a problem, was if localized dispensing to one spot in the pool meant either having to use way more chlorine or if it wouldn't disperse at all?

Boardburner2

Another thing you could consider is having a coil of tube on the input side and just pulling it back once in a while.
I used to have to do this with cables at the bottom of hills.

RE Terrry king.

Pool chemicals can be ridiculously expensive.
Once you know what is in them just make up a barrel of solution and inject it into the filter outlet pipe for mixing , much cheaper.
Peristaltic pumps generally give enough pressure for this.

When mixing the concentrate though be aware of ambient temperature, the chemicals may selectively crystallize out upsetting the mix.

allenjia

Choosing a suitable peristaltic pump is particularly helpful for some projects. Whether it is filling or transferring liquid, I know that a Chinese peristaltic pump supplier's
Code: [Select]
[code][/code] pumps are okay. The most important thing is that they are very resposible to customers. The company is Baoding Chuangrui Precision Pump Co.,Ltd.  Contact e-mail:crpump-allen@foxmail.com

MarkT

Silicon tubing? I would suspect CL would not have an impact.
Not at room temperature, but then again silicon tubing is rare as hens teeth, brittle as glass, and
not what you meant...
You mean silicone.  Totally different thing.  And it is attacked by free chlorine (severely) and hypochlorite (somewhat).  Soft PTFE tubing ought to be better.

Silicon, hard crystalline semiconductor element, related to diamond.
Silicone - range of oils waxes and rubbers based on oxygen-silicon polymer chains.
[ I DO NOT respond to personal messages, I WILL delete them unread, use the forum please ]

terryking228

I had my $12 pump run 2 seasons on my pool. We'll see if it wakes up next May. 

Question on dispersion?? I run the filter pump twice a day for 2 hours each. I tell arduino to start the chlorine pump a minute after the filter pump starts..

As you can see here the chlorine is dispensed into the filter output flow:

http://www.internationalschoolphotos.com/PoolConstruction2017/#ChlorineOutput.mp4
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

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