I need to source two small chemical injection pumps with very low flow rates (24 gal. / DAY). Where should I start the search - do any Vendors specialize in this area?
There are plenty of vendors that specialize in this area. In order to pick one best suited, you must consider more than "chemical injection" and "24gal/day".
What type chemical? Corrosive? Solids? temperature concerns? How much pressure: 1,000 psi or 10,000 psi?? Is this service in the oilpatch, possibly requiring API 674 or 675?? So many questions, so little info.....
You might start looking at Milton-Roy, Lewa, Danfoss if they are API services.