Most exact discharge throttle for heavily polluted waste water
The MID flow measurement for full filling is the central element of the almost self-cleaning, remotely operated and highly precise pneumatic discharge control PNA. The reliable and never-tiring flap with pneumatic drive and the pinch valve react quickly to changing flow rates and conditions.
Flow limitation with control flap or pinch valve
The system is available in wet installation with a control flap or for dry installation with a pinch valve. The following figures show some positions of the pinch valve, which shows that the valve can open completely and unblock the entire cross section as well as close completely. In the intermediate positions it can be seen that the pipe crown remains open until shortly before it is completely closed, so that air can escape. The pinch valve was originally designed for the dosing of stones and gravel, which is why the integrated hard rubber sleeve is extremely robust and resistant to the processing of solids, gravel and aggressive media.