HH47X butterfly type non-slam check valve is applicable to industrial water supply, sewage treatment plant which is mounted on the pump outlet to prevent of backflow in the pipeline and water hammer automatically, achieving protecting the pump and pipeline from being damaged. HH47X butterfly type non-slam check valve is mainly made up of body, disc, non-slam device and micro-control valve. It has many advantages, such like small volume, light weight, power saving, small fluid resistance, new structure design, good sealing and non-slam performance, smooth operation, wear-resisting and long service life and so on. As a result, HH47X butterfly type non-slam check valve is good choice for industrial water and urban sewage.