Common rail valve is the key component of an injector. Our excellent quality Bosch valve set, Denso valve plate, Delphi control valve, Caterpillar control valve and piezo valve would exceed your aftermarket requirements. All the common rail valves are tested not only on the particular test equipment but also mounted in the injectors and calibrated on the test bench. You can find any common rail valves for your diesel fuel injectors from F-Diesel China.