GEA Bock HG34e - Manual (Page 14)

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4| Compressor assembly
4.6 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.
Pipe connection
Pipe connection
4.7 Operating mode of the lockable service connections
Fig. 20
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.
Fig. 21
Opening the service connection
Spindle: Turn ½ - 1 turn to the right clockwise.
—> Service connection opened / shut-off valve opened.
Service connec-
tion closed
Connection
blocked
Spindle
Service connec-
tion opened
Spindle
Connection
open
Compressor
Compressor
Fig. 18 Fig. 19
Valve spindle seal
Release
Tighten