... and development,products passed ISO9001 Quality System Certification. Cummins Relay Valve 1.Model:3527Z27-010 2.Applicable models:the truck ... -trailer brake systems. In the truck's braking systems, Relay Valve shorten the reaction time and pressure from set-up ... flywheel, Cummins Air-drying ASSY,Cummins feed pump,Cummins relay valve,Cummins radiator,Cummins air ompressor,Cummins connecting rod,Cummins ...