Rangeability and pulse weighting data
*)The absolute number of the pulses depends on the meter size and the individual meter itself.
The stated values are of typical size. Exact values determined by calibration of the meter are
located on the nameplate.
7. Installation
Recommendations and requirements for the installation of the MQM Quantometer:
•
Preferably, the meter should be installed horizontally, with index head upward.
•
Straight inlet pipe ≥ 5 DN and outlet pipe ≥ 1 DN in the nominal pipe diameter
is recommended for high accuracy.
•
Ensure that the gas flow is in the same direction as shown by the arrow
at the meter housing.
•
Avoid heavy vibrations and pulsations in the point of measurement.
Installation of a suitable compensator can effectively damp down this kind of disturbance.
•
Drastic changes in the gas flow as well as strongly pulsating flow will increase the
measuring error. They arise for example during frequently switching on-off of
solenoid valves. The pressure impulses by opening the valve very fast may damage
the ball bearings of the turbine rotor and cause failure of the Quantometer.
•
Filter (small mesh size) should be installed upstream of the meter to protect it from
any contamination (suspended particles > 50 µm) during start-up and operation.
8
DN [mm]
G-Type
Q
min
[m
3
/h] Q
max
[m
3
/h]
HF *) [imp/m
3
]
NF [imp/m
3
]
25 10 2 16
140000
10
25
16
2,5
25
140000
10
25 25 4 40
140000
10
50
40
6,5
65
10400
10
50 65 10 100
10400
10
80 100 8 160
27000 1
80
160
12,5
250
27000
1
80 250 20 400
27000 1
100
160
12,5
250
13500
1
100 250 20 400 13500 1
100 400 32 650 13500 1
150 400 32 650 5400 1
150 650 50 1000 5400 1
150 1000 80 1600 5400 1