Check Valves

Check valves are used widely in pipelines conveying liquids, gases and steam. They prevent the fluid from back flow in a very simple manner. The only moving part in the check-valve is the disk with steel, hinged on the body to rotate feely, closing at an angle of 5°C. This design detail ensures the drip tight closing of the disc by gravity even at very low or no-pressure applications. The disc opens in the direction of flow by the inertial effect of the moving fluid automatically. Only at no-flow condition the disk returns to its seat, preventing back flow drip tight. This offers a one-way flow through the valve. The use of swing type check-valves are very important mostly at the outlet of pumps. It is very important that the disk closes rapidly in pump applications with turn-off or electricity cut-off, before reversing flow slams the disc back to its seat, inducing water hammer other than induced by the rapid velocity change in the pipeline. Counterweight is added to the check-valve disc stem for the purpose as an optional feature.

Axis produces Check-valves ranging from 50mm to 300mm diameter. Material of these valves is GGG 40 Ductile Iron Casting and with operating temperature between -10 °C … +80 °C can be specially produced upon the requested need as well.

More Details
Nominal Diameter DN50 – DN300
Pressure Nominal PN10 – 16
Material GGG 40 Ductile Iron
Flange Standard TS ISO 7005-2 / TS EN 1092-2
Dimensioning DIN 3202/2 – F1 / TS EN 558/1-14
Operating Temperature -10 °C … +80 °C
Coating Electrostatic Epoxy Blue
DN/ANSI DN 150-DN 3000, 6” – 120”
Pressure Nominal PN 10, PN 16, PN 25, PN 40
Flange Connection PN 10, PN 16, PN 25, PN 40
Top Flange ISO 5211
Marking EN 19
Face to Face Dimension EN 558-1/14
Test Standard EN 12266-1

  • Drinking water and Irrigation Systems
  • Liquids with no acidic or alcalic or flammable value