difference between d and nd

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ND93PD (ANSI F88) Vestibule LockLatch retracted by key from outside when outside lever is disengaged by key in inside lever. Inside lever is always unlocked.  ND95PD (ANSI F110) Classroom Securit...
ND50PD (ANSI F82) Entrance/Office Lock  Push-button locking. Push-button locks outside lever until unlocked with key or by turning inside lever. Inside lever is always free for immediate egress. ...
The RX monitors the push bar while the LX monitors the latch bolt of the exit device. A SS device has an LX and a key cylinder switch plus an emergency push bar signage.
The old D-Series Lever used a standard lever insert similar to the pre-2002 AL-Series standard lever insert.  The old D Lever insert was smaller than the AL and the two were not comp...
The 9542 is the single door operator that mounts on the "push side" of the opening with a REG arm. The 9531 is the single door operator that mounts on the "pull side" of the opening with a STD arm...
There are two main differences:The bottom latches are differentThe Von Duprin 98/9947 concealed vertical rod device covers up to 1/4" undercutThe Von Duprin 98/9948 concealed vertical rod device co...
They both use Template # 10320_c
We used to offer a E99 rim device where there was a solenoid to lock or unlock the lever or thumbpiece trim on the back side of the center case of the 98/99 device.  When we created the E996L trim ...
The D series is knob trim and the ND series is lever trim.