![]() ![]() ![]() The stem in most resilient seated designs is protected from the media, thus allowing an efficient selection of material with respect to cost and mechanical properties.īutterfly valve Seat: The seat of a resilient-seat butterfly valve utilises an interference fit between the disk edge and the seat to provide shutoff. ![]() There are variations in disk design and orientation in order to improve flow, sealing and/or operating torque.īutterfly valve Stem: The stem of the butterfly valve may be a one-piece shaft or a two-piece (split-stem) design. The butterfly valve consists of only four main components: body, disk, stem and seat.īutterfly valve body: Butterfly valves generally have bodies that fit between two pipe flanges, the most common being lug and wafer body design.īutterfly valve disk: The disk is how the valve stops flow – it is equivalent to a plug in a plug valve, a gate in a gate valve or a ball in a ball valve. When the butterfly valve is fully opened, the disc is at a right angle to the flow of gas or liquid. When the butterfly valve is fully closed, the disk completely blocks the line. A butterfly valve has a disc which is mounted on a rotating shaft. A Butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. ![]()
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