The use of telescopic flange butterfly valve The butterfly valve temperature ≤ 80 ℃, used in petroleum, chemical food medicine, textile, papermaking, electricity, water supply and drainage, gas pipeline, for regulating the role of flow and interception of the media, with compensating pipe thermal expansion and cooling Reduced function. Features 1, the new design, reasonable, unique structure, light weight, easy to operate, quickly closed. 2, the telescopic butterfly valve can play both the role of flow control and closure, but also to compensate for pipe temperature, the resulting thermal expansion and contraction functions, but also easy to install and disassemble for the valve multi-purpose products. Installation Notes 1, the butterfly valve must be cleaned before installation cavity debris. 2, the valve can be within a certain range of telescopic, telescopic parts of the gasket must be loosen before installation, and then wait for the length of the valve and pipe required, and then lock the telescopic seal gland. Main components Material Name Material Body Cast iron, ductile iron, cast steel, stainless steel Valve plate Cast iron, ductile iron, cast steel, stainless steel stem 2Cr13, stainless steel lining Seal Wear-resistant rubber, nitrile rubber Packing Nitrile rubber V Pad, flexible graphite
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