ARK2 Atomac Check Valve

PFA lined swing check valve

Flowserve ARK2 PFA Non-Return Check Valve

The fully PFA-lined FLOWSERVE ATOMAC swing check valves are ideal for use in highly corrosive applications and can replace swing check valves made from exotic alloys due to the universal chemical resistance of the fluoropolymer lining. These valves can be used in horizontal and vertical installations due to the special design of the hinge pin, which enables the disc to achieve a seal without support of any system pressure.

The ATOMAC ARK2 eliminates a potential leak path of conventional 3-piece and 2-piece designs with a seat face integrated into the body liner to seal against the disc in the closed position. The disc can swing freely within the piping system without interference with the diameter of the connecting pipe.  Please see our datasheet for detailed information.

Swing check valve Type ARK2 (Art.-Nr.: 301-1300-xx)

  • DN50, DN65, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400
  • ATOMAC PFA lined
  • Max. operating temperature: +200°C
  • Face to face acc. to EN 558, Row 20
  • Body: ductile iron EN-JS 1049 (GGG40.3) / PFA lined
  • Disc: ductile iron EN-JS 1049 (GGG40.3) / PFA coated


Swing Check Valve


DN50, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, 2", 3", 4", 6", 8", 10", 12", 14", 16"

Flange connection

PN10, ANSI 150, PN16


DIN EN 558-1 Line 20

Body material


Butterfly Disc

PFA coated, FEP coated

Pressure range






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