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1、本产品经过30万次开关测试，经国家技术监督部门检定，品质稳定运转正常，符合QB/T2697-2005技术标准。
Ali floor springs have passed many opening and closing tests, meeting sate application atandards.
2、内置减压阀，防止因外来强压或强风状态下闭门而造成地弹簧损坏或漏油。
Built-in pressure relief valve to protect the unit against any abuse from strong pressure or strong.wind when closing the door.
3、机体采用优质防冻液压油，确保在不同温度下机件运转平稳，灵活。
Filled with highquality anti-icing hydraulic oil,ensuring smooth and flexible operation kf mechanical parts at different temperatures.
4、门开启角度至116度方向选择。
Door openning angel at 116°at your option.
5、可选用90度有止动装置或无止动装置。
90°Stop device or non-stop device at your option.
6、116度到0度单个闭门速度控阀。以配合不同闭门效果。\
With single closing speed adjusting valves at 116°~0°to match different closing purposes.
7、通用型设计，适合左右手及单双开启门扇，各使用方式均备有完整配件。
General designed is suitable for openning doors with left/right hand and single/double opening,accessories are available for esch means.
8、特设可调式上枢轴，安装简易，调整方便、精确。
Adjustable sxis is designed to install and adjust easily & precisely.
| 型号 | DTH-220B | 外观尺寸 | 258×123×52（mm） |
| 适用门扇尺寸 | 1100×2100（mm） | 承受门重 | 125（kg） |
| 门扇最大开启 | 116（°） |
