If the material to be handled is not abrasive, butterfly valves are pefect as isolating valves, and especially when the material is transferred, as usually, by gravity, in batches.

The valve is either open or closed and often fitted with air tight-seal.

They are reasonably priced, require very little headroom for installation, are not too heavy and adequately air-tight.

Butterfly valves are widely used in food and related industries.

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