DeZurik 827 Flanged 3" Knife Gate Valve Rising Stem 316SS Disc Metal Seat

These have some rust but are in working condition.
3" Valve size.  Metal seat, no rubber seal.
Cast iron valve with stainless disc.  
7-1/2" flange OD.
8" Handwheel,  Rising stem.
18-1/2" Overall length.