Designing Liquid Delivery System with Servo Motors

[hanson]

Hi all.
I am designing a liquid delivery system that should handle liquids of volume like twenty ml to a hundred ml.
Ordinary pumps would not work here.
I am thinking of using a servo motor.
But I would need to control the speed as well as displacement of the servo motor, is it possible?

What else would you suggest?

 

[Q_Goest]

Hi hanson,
What you're looking for is known in the industry as a metering pump. Try ThomasNet and check out a few suppliers:
http://www.thomasnet.com/nsearch.ht...eading=64700404&navsec=prodsearch&oplisting=1
http://www.thomasnet.com/nsearch.ht...d+Metering&heading=64501208&navsec=prodsearch

 

[hanson]

Thank you, Q_Goest.
I will search over the suppliers for more information.
But do you know if these metering pumps can pump liquid to small amounts like twenty ml to a hundred ml?
And how much would such a pump usually cost? A range will be enough.

 

[Q_Goest]

Hi hanson,
The metering pumps I've seen are generally very small and would meet your needs. There are much larger ones, but I think the smaller ones are generally used in pharmaceutical industry and other places where a small but precise amount of liquid is desired. I don't use them myself, but I do design various types of pumps. If I had to guess, I'd suspect what you're looking for is on the order of a few hundred to a thousand dollars without controls.

 

[stewartcs]

Try a peristaltic pump.

http://en.wikipedia.org/wiki/Peristaltic_pump