The dynamic choke regulates volume flows of up to 65 l/s.
With the vortex flow control shaft can be regulated volume flows of up to 65 l/s. The vortex flow control shaft VS-Control External is ideal for retention systems fitted with Graf EcoBloc ditch elements or retention cisterns.
- Continuously variable installation depth of 985 mm – 6500 mm (38.8" – 21' 4")
- Minimal height offset between the inlet and the outlet (315 mm (12.4") VS-Control External S; 445 mm (17.5") VS-Control External M; 505 mm (19.9") VS-Control External L)
- Individually adjustable outflow value
- Support in the planning and dimensioning of our system
- Housing can be shortened
Versatile use
- With storage modules, welded into watertight plastic liners
- With GRAF underground tanks
- With retention tanks provided by the customer
Project-specific design
- Flexible adaptation to the local site conditions using GRAF shaft components
- Project specific demensioning of the replaceable orifice
- Different shaft sizes for individual requirements
Reliable in operation
- No wear because there are no moving parts
- Low-maintenance, because of the self-cleaning-effect through vortex flow
- Extremely good revision capability
