Used in liquid, suction and hot gas lines in refrigeration
Check valve type NRVA can be used in liquid,
suction and hot gas lines in refrigeration and air
conditioning plant with ammonia.
NRVA can also be used in refrigerating systems
with uorinated refrigerants.
When the NRVA is used in liquid lines where
cold, thick oil or impurities may be present, it is
recommended that the standard spring be
replaced by a special spring. See ordering table.
Features:
• Ensures correct direction of ow
• Valve housing made of steel
• Available for 40 bar / 580 psig working
pressure
• Large range of anges with connection
dimensions in accordance with standards:
DIN, ANSI, SOC, SA and FPT
• Fitted with damping piston that makes the
valves suitable for installation in lines where
pulsation can occur, e.g. in the discharge line
from the compressor
• Classication: DNV, CRN, BV, EAC etc. To get
an updated list of certication on the
products please contact your local Danfoss
Sales Company.
AI241186442960en-000601
Check valve, Type NRVA
Media
Refrigerants
Applicable to HCFC, HFC and R717 (Ammonia). For further information please see installation instruction for NRVA.
Use with ammable hydrocarbons cannot be recommended; please contact Danfoss www.danfoss.com/en/service-
and-support/learning/.
New refrigerants
Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.
When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the
refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic
refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.
Danfoss ange sets excluding gaskets, bolts and nuts, are specially made for the Danfoss product range and must
only be used for the purpose described.
Select the valve based on capacity and then select the size of anges most suitable for the application, which can be
mounted on the valve.
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
Danfoss oers a wide range of support along with our products, including digital product information, software,
mobile apps, and expert guidance. See the possibilities below.
The Danfoss Product Store
The Danfoss Product Store is your one-stop shop for everything product related—no matter where
you are in the world or what area of the cooling industry you work in. Get quick access to essential
information like product specs, code numbers, technical documentation, certications, accessories,
and more.
Start browsing at store.danfoss.com.
Find technical documentation
Find the technical documentation you need to get your project up and running. Get direct access to
our ocial collection of data sheets, certicates and declarations, manuals and guides, 3D models
and drawings, case stories, brochures, and much more.
Start searching now at www.danfoss.com/en/service-and-support/documentation.
Danfoss Learning
Danfoss Learning is a free online learning platform. It features courses and materials specically
designed to help engineers, installers, service technicians, and wholesalers better understand the
products, applications, industry topics, and trends that will help you do your job better.
Create your Danfoss Learning account for free at www.danfoss.com/en/service-and-support/learning.
Get local information and support
Local Danfoss websites are the main sources for help and information about our company and
products. Find product availability, get the latest regional news, or connect with a nearby expert—all
in your own language.
Find your local Danfoss website here: www.danfoss.com/en/choose-region.
Spare Parts
Get access to the Danfoss spare parts and service kit catalog right from your smartphone. The app
contains a wide range of components for air conditioning and refrigeration applications, such as
valves, strainers, pressure switches, and sensors.
Download the Spare Parts app for free at www.danfoss.com/en/service-and-support/downloads.
Coolselector®2 - nd the best components for you HVAC/R system
Coolselector®2 makes it easy for engineers, consultants, and designers to nd and order the best
components for refrigeration and air conditioning systems. Run calculations based on your operating
conditions and then choose the best setup for your system design.
Download Coolselector®2 for free at coolselector.danfoss.com.
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its
products without notice. This also applies to products already on order provided that such alterations can be made without subsequential
changes being necessary in specications already agreed. All trademarks in this material are property of the respective companies. Danfoss and
the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.