• • Check valve is designed to prevent fluid from flowing back and ensure the flow to one way direction.
  • It can be used to reduce the loss of fluid back suction,avoid pipe is shock by liquid
  • It is used in the food-processing, beverages, winery, oil, cosmetics,pharmaceuticals and chemicals industries.
  • The valve is open when pressure of the fluid exceeds the spring pressure and it is closed when the two pressures are close equal.And stronger counter-pressure also makes the valve closed.

• • Specifications: DN-25/1″ TO DN-100/4″
  • Boby/shaft: AISI 316L/304
  • Spring: AISI 304
  • Seal: EPDM according to FDA177.2600
  • Surface Treatment: Ra ≤0.8 μm
  • Seal:NBR, FPM (Viton) or PTFE. FDA 177.2600(optional)
  • Connections: weld, thread, clamp, DIN, SMS, RJT, IDF, ISO,3A
  • Max. pressure：10 bar
  • Opening pressure：0.3bar(DN-25)0.2bar(DN-32/40)0.1bar(DN-50/100)
  • Working temperature ： -10℃ to 130℃(EPDM)

Nut check valve