Check valve type 562 PVDF with backing flanges

  Datasheet (PDF)

The Georg Fischer SYGEF Standard PVDF check valve type 562 delivers dependable backflow prevention and non-return fluid control across high-purity utility loops and aggressive chemical processing lines. Featuring a hydrodynamically optimized, double-guided return cone mechanism, the valve achieves smooth laminar media passage with minimal pressure loss and operates vibration-free even under elevated flow velocity conditions. The internal 1.4310 stainless steel spring facilitates rapid, positive shut-off and total leak tightness in both horizontal and vertical installation orientations, functioning effectively without requiring hydrostatic head pressure. Constructed from high-purity polyvinylidene fluoride (PVDF), the valve body provides exceptional resistance to strong acids, oxidizing agents, solvents, and deionized water, maintaining outstanding structural integrity across an extensive working temperature range from -20 degrees Celsius to +140 degrees Celsius and nominal pressure ratings up to 16 bar. Equipped with resilient FKM sealing elements and robust PP-steel backing flanges, the unit conforms to standardized EN 558 face-to-face dimensions for effortless integration and straightforward inline servicing. The union end and flange configuration allows quick assembly and disassembly without causing strain on adjacent piping runs. This check valve serves as a high-integrity flow prevention component ideal for pharmaceutical water systems, microelectronics DI loops, and harsh chemical distribution networks.