Spring check valve Type 562 PP-H PN10 d75-110

  Datasheet (PDF)

The Georg Fischer PROGEF Standard Type 562 spring check valve in beta-PP-H provides reliable non-return protection against backflow in pressurized industrial piping networks. Designed for demanding chemical processes, water treatment systems, and industrial utility lines, this flanged non-return valve covers metric outer diameters d75 to d110 (DN65 to DN100) with a continuous pressure rating of PN10. As an authorised Georg Fischer distributor, BigWeld supplies the complete assembly with integrated PP-steel backing flanges and high-grade elastomeric seals.

Technical specifications

Engineered with a spring-assisted closing mechanism and an internal flow-optimised cone, the Type 562 check valve delivers instant leak-tight sealing without requiring reverse hydrostatic pressure. The double-guided return cone ensures laminar flow transitions across fluctuating media velocities, preventing chatter, turbulence, and destructive water hammer during rapid plant shutdowns.

• Nominal pressure rating: PN10 (10 bar maximum working pressure at 20 degrees C)
• Size range: d75 to d110 metric (DN65, DN80, DN100 nominal diameter)
• Face-to-face dimension: Standardized according to EN 558
• Closing mechanism: High-grade stainless steel 1.4310 (V2A) internal spring
• Gasket material options: Chemically resistant EPDM or FKM seals
• Piping series: SDR 9 check valve configuration

Materials and standards

The valve body is manufactured from isotactic beta-PP-H homopolymer, delivering exceptional mechanical rigidity, high chemical resistance, and outstanding long-term hydrostatic strength. This thermoplastic formulation withstands exposure to concentrated acids, aggressive alkalis, and inorganic salt solutions, providing a projected service lifespan of 25 years in water distribution services at 20 degrees C.

The included backing flanges are moulded from UV-stabilised, glass-fibre reinforced polypropylene (PP-GF30) with embedded carbon steel inserts. This composite design guarantees uniform circumferential compression over the flange face, preserving gasket seating stress without risk of thermal creep or distortion under operational bolt loads.

Installation and jointing

Thanks to its internal stainless steel closing spring, the Type 562 operates reliably in horizontal runs and vertical ascending flow pipelines without reliance on gravitational assistance. It cannot be used in vertical descending lines where flow travels downward.

Direct installation into existing flanged industrial spools is simplified by the EN 558 face-to-face length and standard metric drilling patterns. The true union architecture allows maintenance personnel to inspect internal components, clean seating surfaces, or replace elastomeric seals quickly without cutting or dismantling adjacent rigid pipework.