BAOYI slow closure micro-resistance check valve is provided with closing assistance device in order to ensure valve opening-closing stability, without any closure impact, etc., and the product design can meet such relevant standards as API 6D. Generally, the product can be widely applied as the automatic control equipment for preventing medium backflow in the pipelines for electric power, metallurgy, chemical product, urban water supply and drainage system, etc.

·With slowly-closed micro-resistance mechanism, the valve can be stably closed, without any closure impact, etc.;
·Due to the full-bore opening-closing mode, the valve clack has large opening degree and the flow rate can be maximized;
·The product also has other characteristics as the same as those of normal check valves;
·With the external auxiliary mechanisms, the product can be conveniently debugged and maintained.