Manually operated metal valves

PAPER PULP PRODUCING AND HANDLING SYSTEMS, COMPRISING DIGESTERS, MIXERS, PUMPS, SCREENS, WASHERS, DEGASSERS, BLEACHERS, OXYGEN DELIGNIFIERS, BLOW TANKS, FEED CHESTS, AIR LOCKS, CHIP BINS, CHIP METERS, LOW PRESSURE FEEDERS, STEAMING VESSELS, CHIP CHUTES, METAL TRAPS, HIGH PRESSURE FEEDERS, SAND SEPARATORS, LEVEL TANKS, IN-LINE DRAINERS, TOP SEPARATORS, IMPREGNATION VESSELS, BLOW UNITS, FLASH TANKS, SAMPLERS, FILTRATE TANKS, AIR/WATER SEPARATORS, EVAPORATORS, STEAM MIXERS, DISCHARGERS, AND DIFF...