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4.5.2.1 High-pressure pump group
The high-pressure piston pump generates a
pressure of up to 75 bar.
he maintenance-free variable frequency-
driven asynchronous motor enables continu-
ous operation up to 50 Hz. Depending on
the speed of the pump, water
pressure and, consequently, the amount of
atomized water may be varied. Water pres-
sure is in the range from 25 to 75 bar allow-
ing for the optimum mix of throughput and
aerosol size.
4.5.2.2 By-Pass
Task of the by-pass is to ensure the minimum
speed of the high-pressure pump even in
case of very low humidification demand.
Compliance with the minimum speed is
essential for the pump lubrication and, as
such, has direct impact on the pump‘s life
expectancy.
Units not achieving their expected output
capacity due to the limitation intoduced by
the by-pass valve feature a switched mode
for operation under the highest load condi-
tion, i.e. a solenoid valve controlled by relay
K21 cuts the by-pass flow.
Pump group max. feed
output [l/h]
humidification output [kg/h]
@ 95 % efficiency rate
max. speed
[rpm]
HPS250
260
46 - 250
1400
HPS500
620
90 - 600
1400
Pump station characteristics for the various unit models
