The invention refers to a valve, in particular a pneumatic valve with a tappet or nipple provided on an actuator member that opens or closes a passage opening for a medium depending on the position of the actuator. QAM and VSB symbols, which are expressed in two’s compliment notation, include an extra bit required to compensate for a fixed offset term introduced by the two’s compliment numbering system. Each of the plurality of bearing caps has a different bearing cap length and is dimensioned for attachment to the first end shield. In one embodiment, users must log onto the server and are assigned user specific authcodes that are used in a document name to identify a user who created or modified a document.