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Danfoss

NRV refrigeration check valves

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Optimized for use in liquid, suction and hot gas lines

The Danfoss NRV, NRVH and NRVT check valves are optimized for use in liquid, suction and hot gas lines in air conditioning applications to ensure correct flow direction. The NRVH valve is especially designed for systems where compressors are connected in parallel and the NRVT is designed for transcritical CO2 systems.

Features and benefits

  • The valves can be used for fluorinated refrigerants as well as CO2

  • Straightway and angleway versions are available

  • Supplied with flare and solder connections

  • Available with oversize connections for easy installation

  • NRVH is supplied with spring to Δp = 0.3 bar (4 psi)

  • NRVT is designed for a max. working pressure 140 bar / 2031 psig

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Documents

Documents
Type Name Language Valid for Updated Download File type
Brochure A complete portfolio of CO₂ refrigeration solutions Polish Poland 27 Jun, 2023 16.7 MB .pdf
Installation guide Check valve type NRVT English Multiple 24 Feb, 2022 89.2 KB .pdf
Data sheet Check valve type NRVT English Multiple 16 Sep, 2025 1.6 MB .pdf
Data sheet Check valve, type NRV and NRVH Ukrainian Ukraine 11 Jul, 2023 6.1 MB .pdf
Brochure Discover the opportunities of CO2 refrigeration English Multiple 24 Nov, 2025 35.1 MB .pdf
Data sheet NRV check valve CO2 English Multiple 16 Sep, 2025 1.0 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions Italian Italy 12 Dec, 2023 16.5 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions Spanish, Castilian Spain 09 Jan, 2024 25.4 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail French France 17 Mar, 2026 17.1 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail Ukrainian Ukraine 20 Jun, 2023 14.6 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail German Multiple 14 Jun, 2023 11.7 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail French Multiple 02 Jul, 2018 3.4 MB .pdf
Data sheet Обратный клапан, Клапаны типа NRV и NRVH, версия 2 Russian Multiple 24 May, 2020 2.9 MB .pdf

Software

Coolselector®2: We did complex — you do awesome

Coolselector®2 features unbiased calculations for the selection of refrigeration and air conditioning components based on the user’s requirements or based on standard operating conditions.

 

Coolselector®2
Coolselector®2

Learning