Agilent, 5067-4114, Injection valve actuator

Agilent 1290 Infinity autosampler injection valve actuator is a stainless-steel service assembly for the injection valve mechanism in the G4226A autosampler. The actuator forms part of the valve drive arrangement responsible for switching the flow path during sample introduction into the high-performance liquid chromatography system. Its function is distinct from the valve rotor seal, stator head, isolation seal and other sealing or wetted valve components. Replacement may be appropriate when diagnostic testing identifies a mechanical actuation fault rather than seal wear or an obstructed sample path. Isolate electrical power and release fluid pressure before accessing the injection valve assembly. Protect the positioning surfaces and follow the required mechanical alignment procedure during installation. After servicing, verify valve switching, injection timing, sample-path integrity and autosampler operation under the relevant analytical method. Compatibility should be checked for the precise autosampler configuration before ordering.