Structural Characteristics of

• Featuring a spring-assisted dual-plate mechanism, this valve offers shorter travel and faster response compared to traditional swing check valves. In high-rise water supply systems or parallel pump configurations, it closes before backflow gains momentum, effectively neutralizing severe water hammer and safeguarding the pipeline.

• The wafer-thin body eliminates bulky flanges, with a face-to-face dimension only 1/4 to 1/6 that of flanged valves. This provides exceptional flexibility for containerized equipment integration and cramped marine engine rooms or industrial pump houses, significantly reducing overall system weight and loading.

• Cast from high-grade QT450-10 Ductile Iron, the body delivers superior mechanical properties to handle PN16 steady-state pressures with ease. When faced with sudden pressure surges in municipal trunk lines, the material’s elongation properties prevent brittle fracturing, extending the equipment’s service life cycle.

• The seal seat is vulcanized or embedded directly into the flow path, ensuring stability even under long-term high-velocity erosion. Paired with precision-ground plate edges, this design provides bubble-tight sealing, making it an ideal barrier for maintaining pressure in fire sprinkler systems and cooling water loops.

• Both internal and external surfaces are coated with a thick epoxy powder, forming a smooth, chemically resistant protective barrier. This process shields the body from soil and moisture and meets clean water treatment requirements by preventing secondary contamination caused by internal corrosion.

• Designed to be compatible with multiple major flange standards (e.g., GB, ANSI, DIN), the valve is simply sandwiched between flanges using long bolts. This “standard-agnostic” alignment greatly reduces construction difficulty at infrastructure sites caused by mismatched standards, shortening assembly time.

Materials for main parts

Class 150LB Main Connection Dimensions

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