The PPR round valves are manufactured without Venturi air volume measurement devices and can all be equipped with the CMR medium or fast speed actuators. The fastest electric Actuator available is 5s for 60 degrees. All valves can be fitted with pneumatic actuators which are faster then 2s for a 60 degree rotation. The dampers are air tight to DIN 1946 Part 4. Flanges and Counter Flanges with Gaskets are available as an optional.