H43 (7) X, H43 (7) H, HH43 (7) X, HH43 (7) H, HH43 (7) H, H43 (7) X, HDH43 (7) X butterfly buffer check valves mainly used in industrial water supply and sewage treatment plant to prevent the flow of medium in the pipe network. Automatic elimination of destructive water hammer to ensure that water pump and pipeline are not damaged. The valve consists of valve body, disc, buffer and microcontrol valve. The product has the characteristics of novel structure, small volume, small fluid resistance, stable operation, reliable sealing, wear-resistant and cushioning performance. It's industrial.