OPERATOR, VALVE, WORM-GEAR, F/8″/12″B/FLY. OPERATOR, VALVE. WORM GEAR, HANDWHEEL, HEAVY DUTY, WEATHERPROOF, GEAR RATIO:30/1. 1-1/8 INCH ID BORE, WITH ADAPTOR. RATED CAPACITY:6000 INCH POUNDS. CAST IRON COVER AND HOUSING WITH STEEL TRIM. USED FOR KEYSTONE 8-12 INCH BUTTERFLY VALVES FIG.NOS: 99/100/AR1. MFR: KEYSTONE VALVE CO.