4. Gradually turn adjusting screw (2) clockwise while checking pressure gauge (Gp). If the safety valve has
not opened at the pressure specified in Compressor data, it must be replaced by a new one.
5. Readjust the normal working pressure after testing. Consult section Adjustment of pilot valve
6. Fit nuts (3) and handle (1) in their original positions.
6.8 Relief valve
The relief valve protects the LP side of the compressor. No adjustment is allowed.
Testing: Testing as described below shall only be carried out by competent personnel.
Remove the relief valve and fit a G 3/8" plug instead. Remove the safety valve from the air receiver and
replace it by the relief valve. The latter can then be tested at increasing air receiver pressure after the
compressor has been started with the open air outlet valve. If the valve has not opened at the pressure specified
in section Compressor data, it must be replaced by a new one. Reinstall the valves in their respective places
after testing.
Instruction book
64 2920 7089 90
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