Series FF

Hy-Grade Series FF Full Open/Full Flow Wafer swing check valves are designed to be capable of passing pigging devices, scrapers or spheres. Additionally, the design is suitable for sub-sea service. The design allows the disc to rest completely against the upper cavity of the internal body during fully open flow. This creates an unobstructed flow path capable of passing solid objects through. This design differs from other check valves by incorporating an integrated flapper and pin, providing strength at a critical location. Typical swing check valve designs feature multiple components for the flapper assembly, including bushings, nuts, bolts, and hinge pins. These components wear out over time or come apart, leading to check valve failure.