![background image](http://html1.mh-extra.com/html/kaeser-kompressoren/hbpi-pr/hbpi-pr_installation-and-operating-manual_3172311043.webp)
Pressure connection diagram
Fig. 18 Pressure connection to the filter pressure differential switch
1
Low pressure connection
2
Higher pressure connection
3
Inlet silencer
4
Filter
Switching function
Fig. 19 Filter pressure differential switch function
Switching with rising pressure:
■ 1 NC opens
■ 2 NO closes
Switching with falling pressure:
■ 1 NC closes
■ 2 NO opens
4.9.9 Option G1
Check valve
The check valve prevents a reversal of the normal air flow direction.
The valve is closed when the machine is at standstill.
The fixing screws are sealed with Omnifit FD 20.
4
Design and Function
4.9
Options
Number: 9_9572 28 USE
Installation and Operating Manual Rotary lobe blower
HBPI pr
33