The dynamic choke VS-Control flex M regulates volume flows of up to 55 l/s.

With the vortex flow control shaft can be regulated volume flows of up to 55 l/s. The vortex flow control shaft VS-Control flex M is ideal for retention systems fitted with Graf EcoBloc ditch elements or retention cisterns.

  • Minimum height loss 410 mm
  • Individually adjustable throttle discharge capacity
  • Project-specific dimensioning of the replaceable orifice
  • Easy inspections thanks to the horizontal arrangement of the orifice
  • High operating reliability thanks to the self cleaning effects from the vortex flow
  • 360° DN 250 (10") discharge rotation for flexible configurations

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


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