Peristaltic Pumps

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Anonymous Poster	Peristaltic Pumps 09/19/2007 11:31 AM
	I'm trying to find an inexpensive method of injecting small quantities of light oil into a tank. Approximately 1 ML per cycle. There is also approximately 1 litre of water going into this tank with each cycle @ 2 psi. via a 3/4" hose. Passive dosing into that water stream would seem to be easiest and cheapest but I haven't been able to locate a feasible method. There is 12 volts available and a peristaltic pump would work, however that cost may be prohibitive for the market we are targeting. Can anyone point me in the right direction? Thank you! Duncan@projectboatco.com
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Stinky Pete Power-User Join Date: Jul 2007 Location: The cigarette-stained drunkard living in the cardboard box outside Marks & Sparks delivery entrance, Eastgate Shopping Centre, Basildon. Posts: 487	#1 Re: Peristaltic Pumps 09/19/2007 11:37 AM
	Small syringe? I managed to pick up a few in Westernhay last week. Come and get 'em if you want 'em. __________________ Essex jobs for Essex yobs! <Burp>.
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TVP45 Guru Join Date: Jul 2007 Posts: 4448 Good Answers: 143	#2 Re: Peristaltic Pumps 09/19/2007 11:48 AM
	Without knowing specifics of your application, particularly accuracy and quantity of production, it's a little hard to say. You appear to need a metering pump and peristaltic is only one of those. Diaphragm, gear, piezoelectric would all seem possibilities. In small quantities, I would expect to pay about $50 US per pump. These are widely used in chemical/biological labs and somebody like Cole-Parmer is a good starting point. Can you use a simple drip (think IV)? __________________ "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
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Anonymous Poster	#3 In reply to #2 Re: Peristaltic Pumps 09/19/2007 12:11 PM
	Thanks for your help. A drip would be ideal if we could get it to stop or even slow during periods of inactivity.... I'll check out Cole-Parmer .
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ozzb Guru Join Date: Mar 2007 Location: Rosedale, Maryland USA Posts: 5197 Good Answers: 266	#4 Re: Peristaltic Pumps 09/19/2007 3:56 PM
	Small plunger driven by linear solenoid. The amount you are injecting is small. Control the rate of injection by orifice size. Over size the plunger and control the amount with a stop. Limiting the pumping stroke of the solenoid. Never no when you may need a little more or less. __________________ Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
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Andy Germany Guru Join Date: Sep 2006 Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E Posts: 17996 Good Answers: 200	#5 Re: Peristaltic Pumps 09/20/2007 3:58 AM
	Lots of good answers, but really without more exact info, thats probably as far as we can help you.....if its secret we do understand. Its then up to you to decide what to do next.... __________________ "What others say about you reveals more about them, than it does you." Anon.
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Anonymous Poster	#6 Re: Peristaltic Pumps 09/20/2007 9:05 AM
	You might want to try Fluid Metering Company in Syosset, NY. They do this type of thing all the time.
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Hottech Power-User Join Date: Nov 2006 Location: Canada Posts: 336 Good Answers: 5	#7 Re: Peristaltic Pumps 09/20/2007 10:09 AM
	Why don't you use the power of vacuum (2 PSI looks like a vacuum) to pull the oil through an orifice sized to match the flow? No metering pump needed, just an adjustable metering/check in valve. A hydraulics engineer can help you.
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FKIA Power-User Join Date: Jul 2007 Location: Somewhere in the hills of Pennsylvania, I think. Posts: 246 Good Answers: 4	#8 In reply to #7 Re: Peristaltic Pumps 09/20/2007 3:03 PM
	What vacuum? He's talking about 2 PSIG not 2 PSIA - at least that's how I understand it. __________________ I'm somewhere between the age of thirty-something and Alzheimer's. I just can't remember where!
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hioptemp Commentator Join Date: Jun 2007 Posts: 82 Good Answers: 2	#9 Re: Peristaltic Pumps 09/20/2007 3:38 PM
	www.coulbourn.com Tell them an engineer suggested you call. __________________ The purpose of a system, is what it does.
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Andy Germany (1); Anonymous Poster (2); FKIA (1); hioptemp (1); Hottech (1); ozzb (1); Stinky Pete (1); TVP45 (1)

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