PROGEF PP-H Check Valve Type 562 d16-110 PN10

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The Georg Fischer PROGEF Standard Type 562 spring-loaded check valve is an industrial non-return valve moulded in isotactic beta polypropylene homopolymer (β-PP-H) for backflow prevention in chemical distribution, water treatment and process piping. It covers metric diameters d16 to d110 (DN10–DN100) in SDR 9 and holds a nominal pressure of PN10 (10 bar). BigWeld supplies the valve across Europe for fluid handling duties where aggressive media and frequent cycling demand dependable closure.

An internal stainless steel spring (1.4310 / V2A) makes installation position-independent: the valve performs on horizontal, inclined and vertical runs alike. The double-guided return cone has a hydrodynamically optimised profile that suppresses chattering, turbulence and vibration during dynamic process cycles. Unlike gravity flappers, the calibrated spring closes immediately and leak-tight even without hydrostatic counterpressure, limiting water hammer and reverse contamination in the network.

The body and union ends are β-PP-H throughout, giving high impact strength, thermal stability and resistance to acids, alkalis, inorganic salts and industrial effluents. Seals are available in EPDM or FKM to match the medium. The true double union design with socket fusion spigots allows radial installation and removal without dismantling adjacent pipe spools, shortening downtime during maintenance, inspection or replacement. PROGEF components are designed for a 25-year operational life with water at 20 degrees Celsius, in line with long-term hydrostatic design principles.

• Material: isotactic β-PP-H body and union ends
• Dimensions: d16–d110 (DN10–DN100), socket fusion spigots
• Nominal pressure: PN10 (10 bar), SDR 9
• Seals: EPDM or FKM
• Spring: stainless steel 1.4310 (V2A)
• Design: true double union, position-independent installation