DeZurik 828 3" Knife Gate Valve Lug Style Rising Stem 316SS Disc Rubber Seat

These have some rust but are in working condition.
3" Valve size.  R48 Rubber seat seal.  
7-1/2" flange OD.
Cast iron valve with stainless disc.  
8" Handwheel,  Rising stem.
18-1/2" Overall length.