Hi, I'm looking for a recommendation of a book, website, etc. that has some practical process control advice....temperature loops in particular. I have a temperature loop where we are heating a full vessel of water from room temp to 123C by recirculating through a heat exchanger. The heat source is steam but but there are two parallel control valves, a 2" coarse control valve and a 1" fine control valve. I'm struggling a bit on how and whether to apply PID control to both valves and looking for some practical advice to get started.
Thanks, WH