The Von Duprin 1609 cannot be used on a pair of fire rated doors. We recommend using the Von Duprin fire rated mortise exit device in lieu of the rim device such as the Von Duprin 5575-F,...
The 6111 electric strike can be used only on non rated openings less bottom rod with pullman top latch (use ES prefix when ordering device). Device back set will change to match the centerline of t...
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...