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Butterfly valve
Flange type, Wafer type, Lug Type, Welded type; metal seat, Soft seat;
Working Principle
By Revolving hand wheel (worm gear, pneumatic, electrical) driving valve axle and disc revolve in 90 range to achieve opening or closing. Whether worm gear or electric driving, valve opening and closing position has limit mechanism to limit position and indication mechamism to show synchronically disc opening status.
Application
Design Standard: API 609
Face to face dimensions: API609, ISO5752, ASME B16.10, DIN BS5155
Flange dimensions: GB PN6, PN10, PN16, JIS, ANSI, DIN, BS4504,
Test Standard: API 598
Welded Butterfly Valve
