GEA Bock HGZ7 - Manual (Page 20)

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5| Compressor assembly
5.9 Operating the shut-off valves
Before opening or closing the shut-off valve, release the valve spindle seal by approx. ¼ of a turn
counter-clockwise.
After activating the shut-off valve, re-tighten the adjustable valve spindle seal clockwise.
Fig. 25 Fig. 26
Valve spindle seal
release
tighten
Pipe connection
Pipe connection
5.10 Operating mode of the lockable service connections
Fig. 27 Opening the shut-off valve:
Spindle: turn to the left (counter-clockwise) as far as it will go.
—> Shut-off valve completely opened / service connection closed.
The connection which cannot be shut off is intended for safety devices.
Fig. 28
Opening the service connection
Spindle: Turn ½ - 1 turn to the right clockwise.
—> Service connection opened / shut-off valve opened.
The connection which cannot be shut off is intended for safety devices.
Service connection
closed
Connection
blocked
Spindle
Connection cannot
be shut off
Connection cannot
be shut off Service connection
opened
Spindle
Connection
open
Compressor
Compressor