Non-rising-inside screw stems are used in bronze and iron gate valves.

暗杆-内螺纹结构用于青铜和铸铁闸阀。

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LZ series screw gate is used in top silo, bottom silo, inlet and outlet etc. of building material, metallurgical, ore, electric power, chemical industry, glass, light industry and foodstuff etc.

LZ系列螺旋闸门用于建材、冶金、矿山、电力、化工、玻璃、轻工、粮食等行业的库顶、库底及进出口等。 是控制流量变化较大，启动频繁，切断迅速的理想设备。

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New technology and new construction, such as hydraulic coupling, dismountable scraper chain, pneumatic discharge gate valve and screw tensioning device with multi-spring buffer are used.

它采用液力偶合器、可拆式刮板链条、气动卸料闸门以及多弹簧缓冲的螺旋张紧装置等新技术、新结构。

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