9 ELECTRIC, PNEUMATIC, HYDRAULIC AND COMPUTER CONTROLLED VALVES, NAMELY, WEDGE-WITHIN-WEDGE VALVES, THROUGH CONDUIT VALVES, HIGH PERFORMANCE BUTTERFLY VALVES, FCC-VALVES, SOLID SHUT-OFF VALVES, VALVES FOR GLASS TANKS, FLUE GLASS CHANGE-OVER VALVES, COMBUSTION AIR CHANGE-OVER VALVES, DOUBLE DECK SLIDE VALVES, FLUE DUCT VALVES AND MULTI-LOUVRE VALVES