Piston slide valve assembly

摘要

The valve has a sealing element floating on the neck (11) between each piston pair. The sealing element has its range of axial travel limited on one side by a shut-off element (12), and on the other side, by a stop (13) located on the neck.The sealing element comprises a rigid washer (14) and a resilient 'O' ring (15), the latter being installed between the washer and the shut-off element. The later has a end face recess (31) to accommodate the 'O' ring