18mm (Fitted)

Charge level status indicators

A0022951607

Typical Black Magic appearance including black brackets in a robust design

PH1 | PH2 | PH3 | PZ1 | PZ2 | PZ3 | H3 | H4 | H5 | H6 | H7 | H8 | T8 | T10 | T15 | T20 | T25 | T27 | T30 | T40 | SL4 | SL5

EBS 23.01.2150 RELAY VALVE ( 9710021500 ) Spares 18mm (Fitted)On some trucks & trailers, the distance from the brake chambers to the foot valve is too far to cause immediate application of the brake when the foot valve is depressed. This is called brake lag. To correct this situation, a relay valve is installed near the rear brake chambers. A large diameter pipe is connected between the service reservoir and relay valve. The air line from the foot valve to the relay valve now becomes a control line that signals