BUTTERFLY VALVE ASSEMBLY AND METHOD OF MAKING SAME

摘要

A butterfly valve assembly and method of making the same are provided wherein such valve assembly has a valve body structure and a closure structure and is provided with an improved device for locking, in its closed position, a shaft assembly which is used to operate the closure structure. In accordance with another feature of the invention an improved butterfly valve and method of making same are provided wherein such butterfly valve has improved heat exchange means disposed in the outer periphery of its valve body structure for controlling the temperature thereof.