Why do we use both methods?
It depends on how the drain is used - if for some reason it is not possible to place the process water outlets from the technology directly above the drain, then it is necessary to use only lower values identified by the using EN1253-1 process.
Why does the Food & Beverage industry require the use of drains in accordance with the direct methodology?
Even wet floors in food and beverage production will cause a significant health and safety risk. Standing water on a floor can also interrupt production. A good drainage design does not use the floor to lead or retain water discharged from machinery. All waste water should be directed straight into drains without spilling on the floor.
Requirements for measuring flow rate according to the ACO direct methodology
- Air gap - The drain must be exactly below and in the middle of the waste water outlet on machinery - the pipe is ideally one to two times DN above the floor.
- Unless mesh gratings are specified, gratings can cause water splashing and therefore negatively affect the performance of the drain.
- A pipe system with sufficient performance.