Inhibitor Metering
The metering of inhibitors into the cooling water is usually in proportion to the cooling water inflow. The fresh water flow is measured using a contact water meter and the inhibitors are added proportionally.
The concentrations of inhibitors used in the cooling water vary generally between 5 and 100 ppm. Used are corrosion inhibitors, dispergators and hardness stabilizators.
For metering, the "cycles of concentrations" need to be kept in mind. As the inhibitors are also concentrated according to the cycles of concentration in the cooling water circuit, this factor must be considered when metering makeup water. Low inhibitor concentrations in the fresh water lead to higher concentrations in the circuit water (increased by the factor of concentration)
Inhibitors can be dosed accurately and easily using the ProMinent Cool Control unit. A contact water meter and inhibitor-metering pump are connected to the Cool Control. After entering the inhibitor concentration in ppm, the correct amount of inhibitor is automatically dosed into the fresh water.