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VAG Solutions
The VAG DUOJET® Anti-Surge Air Valve works according to a principle which allows a predetermined backflow velocity in the main pipe. The perfectly adjusted orifice in the discharge outlet of the DUOJET® Anti- Surge Air Valve guarantees a defined back-flow velocity so that the maximum pressure rise according to the Joukovsky equation is not higher than e.g. 2 or 3 bars. This can be ensured by the perfectly adjusted orifice plate in the VAG DUOJET® Anti-Surge Air Valve which is specially designed and carefully selected to match each single application. It may sound unbelievable, but with this solution system, consisting of a VAG SKR Slanted-Seat Swing-Check Valve and the VAG DUOJET ® Anti-Surge Air Valve, you can dispense with the costly conventional water hammer protection methods
Working Principle
This water-hammer solution system is in each single case a custom-made and specifically designed solution to prevent uncontrolled water hammer rise in pumping stations and pipelines, where water column separation can be expected. Also, due to its well designed software-based evaluation, it is a perfect solution to fill pipelines under a controlled and safe velocity. Irrespective of the pump flow rate, it allows a filling velocity of the pipeline which is calculated according the existing rules.
See the working principles live in our animation >>