Can you recommend a reliable pump for 24/7 (3m3/h) milk of lime dosing?
In our plant, we use peristaltic pumps, specifically the PCM DELASCO Z series. Almost zero maintenance, just periodic lubrication of the hose—we use silicone.
Very good return. The gear motor is greased for life, and the hose is replaced every 2 years and can be done in situ. But you need to know that if the hose is ever pierced, it will leak, so you should periodically inspect the equipment.