Butterfly valve
Butterfly valve
Butterfly valve
Butterfly valve
Butterfly valve
Butterfly valve and a method of manufacture of said valve
Butterfly valve and drive mechanism for rotation and...
Butterfly valve and method of making same
Butterfly valve and method of making same
Butterfly valve apparatus and method
Butterfly valve assembly
Butterfly valve assembly
Butterfly valve assembly and method of making same
Butterfly valve assembly and method of manufacture
Butterfly valve assembly with improved flow characteristics
Butterfly valve body
Butterfly valve connection piece for an internal combustion...
Butterfly valve construction having a composite seat
Butterfly valve flow control device
Butterfly valve for controlling a gas pressure