Swing-type checkoff er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。
2
Control and examine: adopt microcomputer control system, electronic let-off, electronic weft selecting, automatic wefting, self-check, LCD ect.
控制与检测：采用微电脑控制系统，具有电子送经电子选纬，自动寻纬，故障检测，液晶显示等功能。
3
Welding type high pressure check valve is generated by the pipeline flow of the medium itself force automatically turned on and off, is an automatic valve.