Overpressure flowchart

A. Air inlet

B. Intake silencer

C. Intake filter

D. Oil-free lobe blower element

E. Motor

F. Pulsation damper

G. Vacuum safety valve

H. Check valve

I. Compensator

J. Air out

Atmospheric air

Compressed air

Cooling flow

• A fan forces fresh process and ventilation air in the canopy, through a noise attenuating baffle system.

• Cubicle ventilation air is mixed with the canopy ventilation air.

• The motor cooling fan circulates this fresh canopy air over the motor housing, The motor fan-cowl ensures that air flowing over the motor cooling fins.

• The forced ventilation flow through the canopy removes the heat radiated by the blower core.

• The hot canopy air can leave the canopy through a grating at the side panel.

• The hot air blown out by the startup and safety valve is ducted straight out of the canopy to avoid canopy heating.

Process flow (intake)

• A fan forces fresh process and ventilation air in the canopy, through a noise attenuating baffle system.

• Air is filtered prior to entering the lobe blower element. The filter housing reduces the inlet pulsations.

• The lobe blower element moves air from inlet to outlet.

• Discharge silencer reduces the pressure pulsation levels to the minimum.

• At start-up, the blow-off valve is “open” for smooth unit start-up. That valve closes itself, pushed by the increased air pressure.

Process flow (discharge)

• As soon as the blow-off valve is closed, air pressure increases further, resulting in enough force to push the check-valve open.

• Air is delivered to the system.