73150498
Dec 1, 1977
Nov 21, 1978
ROUND OR RECTANGULAR BUTTERFLY VALVES FOR INSTALLATION IN CONDUITS TO CONTROL THE FLOW OF GASES OR LIQUIDS THEREIN, HAVING MANUAL OPERATOR MECHANISMS FOR ROTATING THE VALVE DISCS BETWEEN THE OPEN AND CLOSED POSITIONS
Metal GoodsROUND OR RECTANGULAR BUTTERFLY VALVES FOR INSTALLATION IN CONDUITS TO CONTROL THE FLOW OF GASES OR LIQUIDS THEREIN, HAVING PNEUMATIC OR HYDRAULIC OPERATOR MECHANISMS FOR ROTATING THE VALVE DISCS BETWEEN THE OPEN AND CLOSED POSITIONS
MachineryROUND OR RECTANGULAR BUTTERFLY VALVES FOR INSTALLATION IN CONDUITS TO CONTROL THE FLOW OF GASES OR LIQUIDS THEREIN, HAVING ELECTRIC OPERATOR MECHANISMS FOR ROTATING THE VALVE DISCS BETWEEN THE OPEN AND CLOSED POSITIONS
Electrical and Scientific Apparatus