2. BRAKING SYSTEM 2.3 TRAILER BRAKING SYSTEM PRESSURE LIMITING VALVE 1 21 1-2 3 DIAGRAM 1 7,8 ± 0,2 bar 21 0 12 2 bar + 22 3 1-2 D000 4690 Port 1 - From compressor Port 3 - Excess pressure vent Port 21 - To compressed air reservoir TECHNICAL DATA Cut-out pressure: 7.8 ± 0,2 bar (113 ± 2.9 psi) Cut-in pressure: 0.6–1 bar (8.7 – 14.5 psi) Relief valve setting: 12 2 bar (174 29 psi) 0 + 0 + 10-29