H76 double-lobe rotary butterfly check valve is used in pure pipelines and industrial, environmental protection, water treatment, high-rise building water supply and drainage pipelines to prevent the reverse flow of media. The check valve adopts clamp type, the butterfly plate is two semicircles, and the spring is forcibly reset, and the sealing surface can be the body overlay welding wear-resistant material or rubber lining, the use range is wide, the sealing is reliable.