The NIBCO ductile iron horizontal swing check valve is designed with renewable stainless steel seat and disc. The swing check valve prevents backflow by automatically closing when fluid reverses direction. It is equipped with a bolted bonnet for maintenance accessibility. The swing check valve includes a renewable stainless steel seat and disc. The ductile iron Class 150 check valve features raised face flanged end connections for easy installation. The check valve is recommended for commercial and industrial steam, water, oil and gas services.