HygroMatik CU-1, Manual

Page: 23 / 56

Page 23
4.6.1 Vacuum Valve Mode of Operation
The water supply is connected to installation (2).
The control air (1) from the control unit is connected to the pres-
sure reduction valve (5). The control air presses the ventil plate
(11) and cone (10) upwards, opening the water supply (2)
Water now flows into the upper chamber. Water pressure (4) in
the upper chamber is normally set by the pressure reduction
valve (5) between 0.5 and 1.1 bar.
The low pressure produced inside the vacuum nozzles creates
suction, pulling down the valve plate (7). The valve cone (6) then
opens the water outlet and water flows to the nozzles.
Atomisation output depends not only on the atomisation pres-
sure, but also on the water pressure set by the vacuum valve.
Note: Set the atomisation output level as specified in section
"output table".
Warning: The vacuum valve will only function normally at water
supply pressures of 2 to 4 bar.
Warning: To protect the nozzle system from impurities, install a
water filter in the water supply line leading to the vacuum valve
as specified in Section “Water Installation”.