Has anyone used Peristaltic Pumps?

Patrick Harding

Patrick Harding

Member
I've been using small shureflo diaphragm pumps for spraying degreaser and also for pushing chem through downstream injectors on our power washers. Unfortunately they seem to always give me problems and last a year tops, so I have been looking for a pump that I could replace them with and came across "peristaltic pumps". They look like good pumps for chemicals as none of the chemical comes into contact with the pump components; all the chem is kept in the hose. Anyways it looked interesting and I was wondering if anyone had tried using them before. Any thoughts?

Here is an article on the type of pump I am talking about:
http://blue-white.com/peristaltic-pumps-excel-in-chloramine-application/

From the article:
"Peristaltic pumps use a circular pump “head” and simple rotating roller design to gently squeeze the fluid through a piece of specially designed tubing. With no valves to clog, metal springs to corrode or ball seats to fail they can effectively pump both fluids and gasses, eliminating the possibility of vapor locking and loss of prime. A peristaltic pump’s output is not affected by changes in the system pressure (it therefore does not have a pump output curve) making its output much more consistent than a diaphragm pump."
 
We have put them in at car washes for dosing super concentrates in to the water stream, and in plants for dosing anti-scaling solutions in to boilers and non-potable water heaters.
 
After doing a little more research it looks like any peristaltic pump with sufficient psi and gpm is $$$$ and huge. It looks like it would be a great pump for maintenance but its not quite for spraying applications.
 
pinpointdan said:
Can you talk more about using pump to push chem through injector? How much does this boost ratio?
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Dan, we use the pumps with the injector so we don't have to worry about hose length. We use 8gpm machines with 200' hose lengths and I think we are getting up to about %15 solution using the super suds sucker, maybe a little better. Its plenty for house washing which is what we use it for. I'm still learning so there is probably a way to get a better ratio. I like the setup because, even if the down streamer isn't working great, the pump will just push the chemical into your line.
 
Patrick Harding said:
Dan, we use the pumps with the injector so we don't have to worry about hose length. We use 8gpm machines with 200' hose lengths and I think we are getting up to about %15 solution using the super suds sucker, maybe a little better. Its plenty for house washing which is what we use it for. I'm still learning so there is probably a way to get a better ratio. I like the setup because, even if the down streamer isn't working great, the pump will just push the chemical into your line.
Click to expand...

Correction, just tested my downstreamer today and found I am only getting %5. I think I was getting better than that, might be a problem with the pump or injector. Anyways I have to do some more checking before I know the real ratio. I'll test it out in the next week or so and see if I can get a better percentage. From what I have read about the pump system I should be able to get close to 15% when it is setup properly.
 
Patrick Harding said:
Correction, just tested my downstreamer today and found I am only getting %5. I think I was getting better than that, might be a problem with the pump or injector. Anyways I have to do some more checking before I know the real ratio. I'll test it out in the next week or so and see if I can get a better percentage. From what I have read about the pump system I should be able to get close to 15% when it is setup properly.
Click to expand...


Another correction, I am getting 13-14% with this setup. I just retested and realized a made a mistake with my calculations on the last test. Anyways, I like force feeding the injector with the pump, but I wish the pump would last longer. A quality pump that I could rely on for a few years would be nice.
 
Downstream

I have used a Downstream Injector with just a garden hose with great results.
 
Booo Did you think I vanished for THREE YEARS?
 
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