We are in the exploratory stage of a project to deliver a specified amount of some chemicals into a mixing tank. We have a few ideas but, in order not to 're-invent the wheel', we would like to bring in some external expertise to advise us on which would be the best solution.  Would someone be able to recommend a company?

Revised: We are in the exploratory stage of a project to pump from a reservoir and deliver a specified amount of some chemicals into a mixing tank. We have a few ideas but, in order not to 're-invent the wheel', we would like to bring in some external expertise to advise us on which would be the best solution.  Would someone be able to recommend a company?  

Some information about flow, head (pressure) and accuracy would be good to guide you into the right direction. But if you just google "metering pumps" you will find a lot of manufacturers. Milton Roy, LEWA, SERA and Prominent are just a few.

I agree with micalbrch.  Build your pit/reservoir out of the right materials for your chemical.  Then use a metering pump (peristaltic style, maybe) and buy the right tubing for that chemical.

Remember this is a positive displacement pump. 1 RPM = 1 constant volume moving forward... ie, PRESSURES INCREASE FAST!   design around that.

As far as a company to do this engineering.  I think that your pump supplier's expertise should be sufficient.  

I've had a lot of good experiences using a Moyno progressive-cavity/pd pump for metering, and also with Watson-Marlowe & Masterflex tubing/peristaltic pumps.

Is this a batch or continuous mixing process?  How accurate does your chemical addition need to be?  These are key factors you've not mentioned, and these factors determine a good portion of your design.

If the chemicals are hazardous, focus on means to minimize personnel exposure when handling them, by minimizing the type of handling required.  Pump them directly from the drums or totes that they're supplied in if that's possible.

Another option may be an AODD pump with batch controller - try www.ashtonpumps.com as they have recently delivered a few complete packages with control systems for exactly this kind of application - more data needed from you though !

Ash Fenn

www.cdrpumps.co.uk

The expertise that you are looking for will depend somewhat on the process that you are involved with, ie. pharmaceutical, biotech, detergents, etc.

You need more than just a pump. In addition, you will need other components such as controls, piping, instruments, etc.

What you need is an industry expert. What industry (process) are you involved with?  

Vasquezand1,

Do you looking for pump mfg or engineering company to make engineering first?

It seem to be a small project, it is better to do by your own.

If you need a specified amount in a reactor for example, you will use a metering pump if capacity is low.

If your applications fall in capacity of metering pump, you will use:
http://www.pulsafeeder.com/

I hope this helps.