American Standard Swing Check Valves

This American standard swing check valve is designed and manufactured according to American National Standards (ANSI B16.34) and American Petroleum Institute (API16D). Swing disc with straight channel which can be installed in both horizontal and vertical pipelines. The inner hinge pin can avoid external leakage. Bolted bonnet design. When pressure is higher than Class 600Lb, pressure self-sealing structure is adopted, which can reduce the valve weight and have reliable seal.