Main applications

  • Ash removal
  • Boiler feed systems
  • Chemical industry
  • Cooling water and condensate
  • Energy
  • Flue gas desulphurization plants (FGD)
  • Flue gas desulphurization systems (FGD)
  • Industry engineering
  • Municipal waste water
  • Nuclear Power Stations
  • Odour removal
  • Oil /Gas
  • Petrochemical Industry
  • Power Stations < 100 MW
  • Power Stations > 100 MW
  • Sewage treatment plants
  • Sludge treatment
  • Steam circuits
  • Turbine Island
  • Waste water
  • Waste water transport
  • Water treatment

Technical data

T max 120 °C
DN max 300
PN max 16


Flanged end swing check valve with or without lining, soft-seated, no dead volumes; in straight-way pattern with slanted seat; with internal hinge pin and soft rubber coated disc.


In building services, industrial plants and power stations; suitable for drinking water, service water, from fluids handled in the food and beverages industry to abrasive and aggressive products in chemical and process engineering.

Further technical information about SISTO-RSKS

Overview of technical data

T -10 – 120 (°C)
DN 25 – 300
PN 16
Body design Y-valve body
Coating Yes
Dimension standard DIN 3202-F6
Lining Yes
Valve disc/plug material Soft seat
Threaded-end design Flange design
Body material (EN standard) JS 1025
Main applications Building services, Water, Oil / Gas, Energy, Industry and process engineering, Mining / Dredge, Waste water / sewage
Body material Nodular cast iron
Body/bonnet seal element Internally and externally confined seal