Anemometer Adapter for ZWB Plate Valves (DN ~110)

Measuring hood for volume flow measurement on standard plate valves.
Convergent shaped channel (nonlinear, bellmouth) with a receptacle for a vane anemometer.
TPU flanges ensure a tight, scratch-free fit on the valve and the device.
 

Motivation:

I wanted to save myself the expensive professional measuring hood and still be able to reliably measure volume flows at my plate valves to balance the central residential ventilation system myself.
This design uses an inexpensive vane anemometer + 3D printed hood (Amazon Link: https://www.amazon.de/dp/B0BKGY7JWC). This allows me to adjust the air volumes per room using a comparative method (first proportionally up, then down to target) – cost-effective, reproducible, and without special equipment.
 

Principle of operation (brief):

   Conical channel with nonlinear contour and bellmouth inlet concentrates the flow without separation.

   At the measuring cross-section (throat Ø 65 mm), the anemometer measures the average speed.

Recommended print settings:

Channel (PETG/PLA)

   Nozzle 0.4; Layer height 0.20–0.28 mm

   Walls 4; Top/Bottom 6; Infill 15–20% Gyroid

   Option: Inner ironing for smooth flow surface

   Orient with large base down; no support structures needed

TPU Flanges

   Layer height 0.20 mm; Walls 3; Infill 30–40%

   Speed 25–35 mm/s; Low retraction

   Goal: soft sealing edge; fine-tune flow to 98–102% if necessary