Check valve type 561 Rp PP-H

  Datasheet (PDF)

Georg Fischer PROGEF Standard Type 561 check valves are engineered for reliable, non-return fluid control in industrial thermoplastic piping networks. Designed specifically for vertical installations with upward flow, this true double union non-return valve prevents reverse flow, protecting upstream pumps, dosing equipment, and filtration systems. Manufactured from high-grade beta-PP-H (polypropylene homopolymer), the valve offers superior resistance to aggressive chemicals, alkalis, and industrial wastewater, ensuring an operational lifespan of up to 25 years in water applications at 20 degrees Celsius.

The valve utilizes an advanced springless mechanism driven by gravity and fluid backpressure. Inside the hydrodynamic housing, a flow-optimized, double-guided return cone ensures quiet, vibration-free operation even under high flow velocities. Eliminating metallic springs prevents corrosion and fluid contamination, which is critical in chemical distribution and effluent processing. Reliable sealing is achieved from a minimum water column of 2 m (0.2 bar), maintaining tight shut-off under continuous process cycles.

Equipped with reinforced Rp female threaded sockets according to ISO 7-1, the Type 561 integrates easily into industrial piping lines. Its true double union construction enables swift radial installation, maintenance, and seal replacement without dismantling adjacent piping. Furthermore, the face-to-face dimensions match Georg Fischer Type 546 ball valves, ensuring modular flexibility across installations.

• Nominal pressure rating: PN10 (10 bar at 20 degrees Celsius)
• Body material: beta-PP-H (isotactic polypropylene homopolymer)
• Connection: Reinforced female thread Rp conforming to ISO 7-1
• Sealing options: High-performance EPDM or FKM seals according to EN ISO 16137
• Operating mechanism: Springless design with hydrodynamic double-guided cone
• Minimum sealing pressure: 2 m water column (0.2 bar)
• Mounting position: Strictly vertical piping with upward flow direction