Installation
Area of application
METPOINT FLM can be used in compressed air networks subsequent to air treatment. For this purpose a suitable upstream and downstream section needs to be available. The connection to the compressed air system is effected via a ball valve and can be carried out under pressure.
Measuring section preconditions
A suitable inlet and outlet section is required to ensure accurate measurement results.
 |
 |
Undisturbed flow is obtained by providing a sufficiently long section up-stream of the sensor (inlet section L1) and downstream of the sensor (outlet section L2). These sections must be absolutely straight and without any obstacles such as edges, seams, bends, etc. The design of the outlet section is equally important because obstacles to flow will create turbulence, which will not only have an impact in the direction of air flow but also counter to the flow. |
If desired, BEKO can supply optional measuring sections for FS109 consumption probes.
The following table shows the necessary calming sections in relation to given obstacles. Stated here are the required minimum values. If the specified calming sections cannot be provided, the user must expect greater or considerable deviations of the measurement results.
 |
|
|
| Obstacle to flow upstream of measuring section |
Minimum length inlet section (L1) |
Minimum length outlet section (L2) |
| Slight curvature (bend < 90°) | 12 x D | 5 x D |
| Reduction (pipe narrows towards measuring section) |
15 x D | 5 x D |
| Enlargement (pipe is enlarged towards measuring section) |
15 x D | 5 x D |
| 90° bend or T-piece | 15 x D | 5 x D |
| 2 bends, 90° each on one level | 20 x D | 5 x D |
| 2 bends, 90° each 3-dimensional change of directions |
35 x D | 5 x D |
| Shutoff valve | 45 x D | 5 x D |
Measuring ranges
|
|
|
|
|
|
| Measuring section | FS109 |
||||
| max. 185.0 m/s |
|||||
| Internal diameter | Measuring ranges |
||||
| Inch | DN | mm | min | max | |
| 1/4" | DN 8 | 6 | 1.5 | to | 157 l/min |
| 1/2" | DN 15 | 16.1 | 3.5 | to | 1516 l/min |
| 3/4" | DN 20 | 21.7 | 0.4 | to | 178 m³/h |
| 1" | DN 25 | 27.3 | 0.6 | to | 295 m³/h |
| 1 1/4" | DN 32 | 36.0 | 1.2 | to | 531 m³/h |
| 1 1/2" | DN 40 | 41.8 | 1.5 | to | 728 m³/h |
| 2" | DN 50 | 53.1 | 2.5 | to | 1198 m³/h |
| 2 1/2" | DN 65 | 71.1 | 5 | to | 2187 m³/h |
| 3" | DN 80 | 84.9 | 7 | to | 3133 m³/h |
| 4" | DN 100 | 110.0 | 12 | to | 5279 m³/h |
| 5" | DN 125 | 133.7 | 18 | to | 7808 m³/h |
| 6" | DN 150 | 159.3 | 25 | to | 11097 m³/h |
| 8" | DN 200 | 200.0 | 33 | to | 17533 m³/h |
| 10" | DN 250 | 250.0 | 52 | to | 27429 m³/h |