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NR-020 | Wafer Style Check Valve for Industry


  • Instalación y mantenimiento:
PN 16


The NR-020 Check Valve is compatible for installation on horizontal pumps and boosters in order to prevent the return flow of liquid to its source and to provide quiet closing and total sealing of the sealing face. The check valve is designed for free flow of liquids without interference and minimal head loss. The check valve is made from composite materials (diameters of 3”-6”) and an anodized aluminum alloy (8” diameter).

Características principales

  • Working pressures: up to 16 bar.
  • Maximum working temperature: 60°C.
  • Maximum intermittent temperature: 90°C.

Note: For applications requiring a working temperature above the maximum stated or below 50 C., please consult first with the A.R.I. Applications Engineering Dept.

  • In the 3”-6” diameter models, the valve body and disc are made from composite materials which are resistant to highly abrasive conditions and durable in environments using corrosive liquids such as sea water, brine and chlorine.
  • In the 8" diameter models, the valve is made from an anodized aluminum alloy. Use in corrosive liquid environments such as sea water, brine and chlorine, require an additional modification to the check valve and needs to be specified.
  • Metal parts are made from SAE 304 stainless steel (SAE 316 stainless steel is also available upon request).
  • The valve is supplied together with seals for flange to flange installation.
  • The spring assembly mechanism is outside of the flow cross-section and can be replaced without removing the valve from the pipeline.

Selección de la válvula

  • The valve is available in diameters: 3”, 4”, 6”, 8".
  • The valve is available with a limit switch that transmits a contact signal at flow start or its discontinuance (pump safety mechanism), Model NR-020-LS.
  • The valve is available with a strainer added, Model NR-020-FV (foot valve).
  • The valve is also available for pressures of up to 10 bar, Model NR-010.


For best suitability, it is recommended to send the fluid chemical properties along with the valve request.
Upon ordering, please specify: model, size, working pressure, thread and flange standard and type of liquid.

Actualizado el: Sábado, 07 Junio 2014