伸缩蝶阀适用于温度 ≤ 80 ℃，公称压力 ≤ 1．6MPa的食品、医药、化工、石油、电力、轻纺、造纸等给排水、气体管道上作调节流量和截流介质的作用，具有补偿管道热胀冷缩的功能。

SD343W不锈钢伸缩法兰蝶阀标准规范：
设计制造标准：GB/T 12238-2008、JB/T 8527-1997 
结构长度标准：GB/T 12221-2005
连接法兰标准：GB/T 9113
压力温度等级：GB/T 12224-2005
试验检验标准：GB/T 13927-2008

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