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This product is functional combination of flange butterfly valve and pipe expansion joints which can play a role not only throttling, but also eliminate internal forces generated by temperature difference, which plays the role of stretching. The product is available in electric power, metallurgy, petroleum, chemical, gas, urban heating, water and electricity paper making, textile, medicine, food, water supply and drainage, energy, all non-corrosive gases, liquids, semi-fluid and solid powder pipelines and containers as the use of the regulation and closure. It can be installed anywhere, independent of medium and flow direction, Meanwhile can be used to adjust space between two flanges.
Features:
1、Small size and light weight；
2、Easy operation ,labor-saving , opening and closing quickly；
3、Sealing parts can be adjusted and replaced, reliable sealing performance, small flow resistance, energy saving；