The cylindrical and conical NRV element, the ring and the pipe segment are auxiliary geometries in order to be able to map the pressure loss of a non-return valve with the simplest possible input parameters.

The values for the length $L$, the flow length $L_{st}$, which can also be longer than the length $L$, the outer diameter $D_A$ and the inner diameter $D_I$ must be specified in the mask for the ring segment.

• Define screw data
• Define internally tempered screws
• General notes on defining the screw geometry
• Feed, Metering and Venting section
• Compression and Decompression section
• Barrier section
• Maillefer section
• Flight switch section
• Wave-Zone

• Maddok shearing section
• Spiral shearing section
• Toothed disc mixing section
• Faceted mixing section
• Cross-hole mixing section
• Cylindrical and conical shearing section
• Troester shearing section
• Cavity mixing section

• NRV - Cylindrical and conical NRV element
• NRV - Ring segment
• NRV - Pipe segment
• NRV - Annular non-return valve