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The typical butterfly valve 2012-01-13
The typical butterfly valve heretofore known comprises an approximately cylindrical casing having an annular valve seat on its inner peripheral surface, a valve stem rotatably extending through the ca
A butterfly valve 2012-01-12
A butterfly valve assembly for installation in a pipe line between flanges having spaced parallel planar annular faces extending transversely of and centered upon the lengthwise axis of said pipe line
A butterfly valve structure designed 2012-01-11
Butterfly valves are typically simple and reliable valve structures that are particularly designed for operation in a low pressure service condition. Sealing of a butterfly valve is generally accompli
Butterfly valves adaptable for high pressure 2012-01-09
Butterfly valves typically include a circular valve member or disc which is rotatably mounted inside a valve body having a generally cylindrical bore defining a flow passage. O-rings formed from a sof
Fluid control valves 2012-01-06
Some prior attempts have been made to provide a partially water-cooled butterfly valve wherein coolant water is introduced to the rotatable disc portion of the valve at one side thereof and withdrawn
A butterfly valve optimize the sealing effectiveness 2012-01-05
With a butterfly valve of the type just described, it is desirable to provide features that will optimize the sealing effectiveness of the valve, yet minimize certain disadvantages apparent in prior a
A large diameter of butterfly valve 2012-01-04
In view of the above-noted state of the art, the object of this invention is to provide a butterfly valve free from sticking at the bearing portions and from an inconvenient flexion of the stem under
Good sealing capacity of butterfly valve 2011-12-31
The main object of the present invention is to provide a butterfly valve having good sealing capacity and not implying soft sealing element made of rubber, plastic or similar materials. More specifica
