PD Pump choices for metering application

[phosacid]

Hello all. My first post to the website!

I am looking into the purchase of a few positive displacement pumps for a batch/blend skid we are constructing.

As a temporary system, we are using small gear pumps, but they have troubles with small polymer solids that seem to be unavoidable, and the temp of our condensate (~160F)

For the permanent install, we have chosen to use fractional AC variable speed drives to control. We will be using mag-meters for flow rates, and as such, have eliminated piston type pumps due to slugging and mag meters accuracy. Here are the other details.

Pump A (blend)
up to 2L/min (0.52gal/min) liquid polymer (up to 3000cP and 1.1sg) mag-metered into 100 psig condensate (160F) or 115 psig service water (40-70F)

Pump B (batch)
up to 50L/min blend (13.2gal/min) at ~1% concentration into open tank (minor piping losses)


Any experience on what types or models of pumps that would work well in this continuous service (reliability, cost, maint, etc factored in?)

Thanks for any help you may be able to provide.

Cheers!