
Fig. 1
Technical Data continued
Capacity chart PA 46, PA 47, MPA 46, MPA 47
Calculation of the amount of boiler water to be discharged
according to the following formula:
A =
Q · S
K – S
Conductivity of
feedwater: S [µS/cm]
Admissible conductivity
of boiler water: K [µS/cm]
Boiler capacity: Q [kg/h]
Amount of boiler water
to be discharged: A [kg/h]
Example
Conductivity of
feedwater: S = 20 µS/cm
Admissible conductivity
of boiler water: K = 4000 µS/cm
Boiler capacity: Q = 2000 kg/h
Amount of boiler water
to be discharged: A ≈ 10 kg/h
How to read chart fig. 1
Boiler pressure: 25 bar
Nominal size of intermittent valve for removing boiler
sludge DN 32
Capacity: 2.5 kg/s
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