The NIBCO? ductile iron horizontal swing check valve is designed with renewable seat and disc. The swing check valve prevents backflow by automatically closing when fluid reverses direction. The ductile iron check valve features PN16 face flanged end connections for easy installation. It is equipped with a bolted bonnet for maintenance accessibility. The swing check valve includes a cast bronze seat and disc. The check valve is recommended for commercial and industrial steam, water, oil and gas services.