EGR solenoid valve assembly & test line (OP10–OP80): automatic housing loading, bush insertion and staking, camshaft assembly, flange bearing pressing, poppet head welding with leak test; middle gear shaft, sector gear and motor gear sub-assemblies; cover and displacement sensor assembly; final leak test with bolt and gasket assembly.

Continuous automatic flow across the line, with force-displacement monitoring at every pressing station.