What is the PAC dosing rate for a pool?

This can typically be achieved within the space above the filter media. Dosing Calculation: For pools with a capacity of 450m3 (100,000 gallons) and a turnover period of 2 hours, the circulation rate is 225m3 per hour. Therefore, the PAC dosing rate for this pool would be 22.5ml per hour.

What is the PAC dosing rate for a 450m3 pool?

Dosing Calculation: For pools with a capacity of 450m3 (100,000 gallons) and a turnover period of 2 hours, the circulation rate is 225m3 per hour. Therefore, the PAC dosing rate for this pool would be 22.5ml per hour. Although a small quantity, accurate and continuous dosing can be challenging.

Should Pac be diluted with water?

It is crucial not to dilute PAC with water as it will form a gel. The dosing should be evenly mixed throughout the water flow. The best location for dosing is as far upstream as possible, after the sample point for the chemical controller.

What is the coagulation removal rate of polyaluminium chloride (PAC)?

Without coagulation removal rates in a single pass of a medium-rate filter were about 50%. This was dramatically improved, to over 90%, by dosing polyaluminium chloride. PAC is directly and continuously dosed from the containers in which it is delivered at a rate of about 0.1ml/m 3 of the circulation flow.

How does polyaluminium chloride coagulation work?

Continuous coagulation with polyaluminium chloride has long been recommended by PWTAG – especially in the light of the threat from Crytposporidium. Like all coagulants PAC works by extracting and then clumping together dissolved, colloidal and suspended matter. The resulting floc is then trapped on the filter.

How is polyaluminium chloride dosed?

This was dramatically improved, to over 90%, by dosing polyaluminium chloride. PAC is directly and continuously dosed from the containers in which it is delivered at a rate of about 0.1ml/m 3 of the circulation flow. (It is very important that it is not diluted with water as it will form a gel.)