maximum flow plastic perestalic pump head that can be put on a shaft - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 03:31:44 am
content: I want to buy a perestalic pump head that I can put on like a 6 inch shaft connected to like a drill motor with reasonably maximized flowis there some manufacturer I can look at? its super confusing. I want to connect it to 1/4 inch tubing

author: IanB
author_rank: Super Contributor
timestamp: March 09, 2024, 03:40:09 am
content: Doesn't make sense to me."Peristaltic pump" and "reasonably high flow" seem to be in contradiction with each other.Peristaltic pumps are typically used in low flow metering applications. They would work with something like a stepper motor, or a highly geared down shaded pole motor, at reasonably low shaft speeds.If you talk about an electric drill, then you would immediately be thinking of a centrifugal pump, which typically would handle high flows at low heads, with the high rotational speeds that you get from a drill motor.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 03:42:38 am
content: it kinda works I have some little one but it does not spin very fast and its integrated I think you can spin it faster. not sure how much the tubing can take but it might be alot more then that dinky thingI just wanna buy like a decent thingy to mount to a stronger motor. I think you can make the rotating thing bigger and use more tubing too

author: IanB
author_rank: Super Contributor
timestamp: March 09, 2024, 03:44:16 am
content: To give you a more constructive answer, if you want something "like" a peristaltic pump (a positive displacement pump) at higher flowrates, then maybe you want something like a screw pump?https://en.wikipedia.org/wiki/Screw_pump

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 03:44:56 am
content: I want a peristaltic device that uses the silicone hose at the maximum that it can be used for at the dimension that it isnot sure when it will rip or tear

author: IanB
author_rank: Super Contributor
timestamp: March 09, 2024, 03:46:37 am
content: Quote from: coppercone2 on March 09, 2024, 03:42:38 amHave you tried AliExpress or similar? That's where you are likely to find something you are looking for.

author: IanB
author_rank: Super Contributor
timestamp: March 09, 2024, 03:48:04 am
content: But like I was suggesting before, "peristaltic pump" = low rotation speeds and low flowrates. That's just reality.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 03:48:17 am
content: I think if you make the wheel bigger with more columns and route more tubing in a circle it will pump more and strain the tubing lessI was hoping someone knows of a big one with like a 6 inch wheel

author: beanflying
author_rank: Super Contributor
timestamp: March 09, 2024, 04:48:51 am
content: I used to work for the importer of these where I was the State Rep.https://www.wmfts.com/en-au/brands/bredel-hose-pumps/They are NOT considered high flow and really dislike high speeds as it totally kills the life of the hose let alone what would happen to a simple hose in a cheaper one.You really have to have a specific requirement to make a Peristaltic pump work or be of a benefit otherwise there is maybe a dozen other types of positive displacement pumps that will be cheaper or do the job better for less $.Where they shine is 'difficult liquids' like shear sensitive polymers or grouts, food products and even the explosives industry. BASF Plastics, Thixotropic Grouts and Cement mixes in bridge tendons, Pizza Toppings and even whole Chicken Livers, and even Nitroglycerinfor a few random examples.

author: jpanhalt
author_rank: Super Contributor
timestamp: March 09, 2024, 05:14:45 am
content: Why do you want to use a peristaltic pump?Do you have to avoid liquid seals (e.g., around a shaft)? What liquid will you be pumping?

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 06:51:59 am
content: because it can pump cold fluids that are syrupyif I put it on a plastic shaft it can be isolated in styrofoam. Like pumping coolant through a ice cream maker machine to cool a component. It works but you need more flow to get things cold enough, its puny.

author: beanflying
author_rank: Super Contributor
timestamp: March 09, 2024, 07:00:55 am
content: As you raise the speed a peristaltic pump (or ANY pump) with viscous liquids you WILL run into npsh issues. This can be overcome depending on 'actual' viscosity and a known product by an Auger feed and a reduction in speed along with if needed a larger Pump/system and NOT an increase in speed which is WRONG.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 07:28:36 am
content: I don't want to switch technology. it almost works fine. I doubt I have the end all of prestalic pumps with this piece of shit powered by some AAA batteries.

author: beanflying
author_rank: Super Contributor
timestamp: March 09, 2024, 07:46:40 am
content: So go bigger and slower being non specific will be your best option while faster may not.With even medical quality (or light duty dosing options) peristaltic pumps the tube type and the ability of the pump to properly pinch that off matters. The trash end this will be a real issue when it comes to performance.Another part of the issue that peristaltic pumps run into with more viscous fluids is that flow has a real pulse and for this reason on them specifically both inlet and outlet dampeners are often added in industrial solutions where npsh or pipe friction/pressure becomes an issue.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 08:40:31 am
content: so far the problem I have is that the heat is not being removed from the heat exchanger because the loss in the pipe is too high and the flow is too low. At least, there is a big differential, even with insulation.I just need enough flow to say cool something connected to the impedance analyzer.I actually remember that this hose is 3/16 and I have 1 size larger. I forgot to change out the pump part. That might be enough.But seriously I am pretty sure I can turn this 2x as fast and the tubing would be fine for a long time. I need it to run for maybe 10 min max.I just need a manufacturer so I can make a styrofoam enclosure for the pump, mini tank and put it on top of the cold source. It should get rid of alot of losses if I can do that, then its up to the hoses.

author: jpanhalt
author_rank: Super Contributor
timestamp: March 09, 2024, 11:38:02 am
content: Quote from: coppercone2 on March 09, 2024, 07:28:36 amIt seems many of us misunderstood what you meant by "high volume," if you are almost there with what you have and AAA batteries. What volume do you need and at what pressure?

author: beanflying
author_rank: Super Contributor
timestamp: March 09, 2024, 12:11:29 pm
content: No I understood exactly what he was talking about 'high volume because he mentioned 1/4" in the opening post'. The follow-ups made it very clear he wanted to overdrive the speed of that pump.This is bread and butter applications Engineering but what was never given or offered was even a basic 'volume required' or even a clue what the fluid was. What is needed is Actual Chemical data (or at least Fluid X at Y%), temperature and any associated valves or pipes even before you get to a being able to get to a pressure calculation. There is a very good reason any reply I gave was a generality absent even some of the most basic data.There are several actual 'brands' of quality Peristaltic Pumps that fit into this 1/8 - 1/2" hose size but they will not be cheap. So unless you want to do some of your own guess work and buy 3 or 4 bits of AliX or Evilbay Peristaltic Pumps there is not much to be done without actual info.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2024, 05:19:59 pm
content: I said I want to buy a pump that has a remote head that I can attach with a shaft through styrofoam. my point is that I am pretty sure you can do better then a dinky AAA powered pump that i have now. its a fine transfer pump for etchant but it has slightly low flow and its not easy to insulate for very cold fluid transfer.They clean very well, don't really drip when you disconnect them, don't require elevation/prime related design effort, its quiet probobly does not heat the fluid much and they won't have problem pushing fluid through restrictions etc for tiny thermal transfer experiments and microfluidics stuffI can actually cut a styrofoam circuit for the tube to go in if I could isolate the pump head, its too big when you have the motor and control stuff attached.Based on what I am seeing the tubing is not at its limit with the little pump, which is incapable of higher speeds anyway

author: Doctorandus_P
author_rank: Super Contributor
timestamp: March 11, 2024, 03:40:57 pm
content: Quote from: jpanhalt on March 09, 2024, 05:14:45 amIndeed. A peristaltic pump is no magic bullet. Start with a list of requirements, and then select a pump type based on those requirements.

author: coppercone2
author_rank: Super Contributor
timestamp: March 11, 2024, 08:30:01 pm
content: the problem is how the hell should I know what the requirements are its just screwing around

author: Infraviolet
author_rank: Super Contributor
timestamp: March 12, 2024, 01:55:53 am
content: Note that for a peristaltic pump, you can construct one yourself without needing to worry about the fluid-tightness of the parts you construct, because the fluid is always within the sealed compressible piping you've bought. So 3d printing or other DIY methods are pretty feasible, for a peristaltic pump you don't need to worry about prints not being perfectly fluid-tight. Provided you've got piping adapters made of some material which is leak proof and seals well, you could always try paralleling up a bunch of separate pumps, each with too little flow rate individually, but enough when summed and some accounting made for possible inefficiencies.