螺旋闸门
Screw valve
n 用途
螺旋阀门是一种粉料、晶粒科、颗料科及小块物料的流量或输送量的主要控制设备，广泛应用于矿山、粮食等行业控制流量变化或迅速切断（物料直径≤50mm）
n Purpose
Screw valve is a kind of primary device for controlling flow or flow rate of powder,grain,particle,and small piece material,It is widely used for such sectors including mining,grain,etc,for regulating flow of cutting rapidly（special material diameter=50mm
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