High performance of Flex Flange Butterfly Valve: 1,flange type,size: 2" -72", 2,rating:150lb-600l. Two-way Sealing Butterfly Valve Dual-clamp butterfly valve is an advanced valve in the short distance between flange poles of 2 pipes with unique design,new structure and outstanding performance. 1. It is light and small in size and easy to disassimble and repair;2. It can be turned 90º swiftly when ...