![Dynamic balancing valve Fig. 9900P and Fig. 9920](/images/stories/prodotti/CoverDynBal.jpg)
In the 9900P, 9900V and 9920 series valves the regulation is obtained by means of a cartridge specifically designed for each flow. The valves are specifically designed for an easy positioning of the cartridge after an initial flushing of the system or should it be necessary to change the cartridge with a new one more suited for a different flow. FBB, 9655 and 9700 series valves can be preset within specific working ranges.
Test points (optional) allow to verify that valve is actually working within its true differential pressure range.