The hh47x butterfly buffer check valve produced by our company is mainly used at the water pump outlet of industrial water supply and sewage treatment plant to prevent the medium reverse flow in the pipe network. Automatic elimination of destructive water hammer, so as to ensure that the pump and pipeline are not damaged. The valve is mainly composed of valve body, disc, buffer device and micro control valve. The product is characterized by novel, stable operation, small volume, small volume and good sealing performance.