Trox Technik X-CUBE-Ex Guide D'utilisation page 81

BA-CFD-RLM-ATEX 3.9 – 04/2016
Figure 7-2: Gap width
Figure 7-3: Measured
points
Figure 7-4: Volumeter
 The impeller is turning idly and does not touch the intake cone!
 The distances from the impeller to the plant parts on site are checked and
meet the requirements for explosion protection.
 The stability of the fan against collapse of the fan has been checked.
7.4 Checking the Gap Dimension on the Fan
 Check gap between impeller and inlet cone and between impeller
border and pressure measuring nipple of the volumeter against
chart values below!
Table 7-1: Gap width
RLM
2225
2528
2831
3135
3540
4045
4550
5056
1. Measure the gap and ensure that the width of the gap does not fall below
the threshold in any phase of the rotation (manual rotation).
2. Carry out measurements on four 90° points on the circumference.
Ensure that the gauge is placed on the outer diameter of the inlet cone.
7.5 Volumeter
The fans are equipped with a volumeter as a standard. With this flow
measuring device it is possible to measure/monitor the flow easily after the
fan is installed.
- Measuring nipple on intake cone
- piping to connector at support unit
- connector (external diameter 6mm) to pressure measuring device
 
qv K
Gap width „s"
2,0
2,0
2,2
2,4
2,7
3,0
3,4
3,8
2
3
4
q
V
K
2
 
ρ
p
 Dü
p
Dü
RLM Gap width „s"
5663 4,3
6371 4,8
7180 5,4
8090 6,0
9010 6,7
1011 7,5
1112 8,5
1214 9,5
1
volume flow [m³/h]
calibration factor [m²s/h]
density of media [kg/m³]
pressure difference at cone [Pa]
English
EN-13/24