Mechanical valve / piston with sealing plate for fully automatic coffee machines DeLonghi ESAM

The mechanical valve with piston and sealing plate is part of the water system in DeLonghi ESAM fully automatic coffee machines, where the piston regulates movement within the valve and the sealing plate ensures it stays watertight. This combination prevents water leaks and maintains the pressure needed when switching between machine functions. A worn piston or damaged plate causes leaks, pressure loss, or valve malfunction.