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A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The valve body should be one-piece or lug design with extended neck and a concentric disc and seat configuration to allow for 2"~48" of piping insulation, have flange hole drilling conformed to PN, ASME, JIS standards and be provided with a non-corrosive bushing and self-adjusting stem seal.

The Butterfly valve has CE/PED Certification.