Danfoss NRV, NRVH Data sheet

Data Sheet

Check valve Type NRV and NRVH

Version 2

NRV and NRVH piston type check valves are designed for installation in commercial refrigerating systems and in residential or industrial air conditioning plants. They are used to control the unidirectional ow of refrigerant so as to prevent backow.

Features:

• Available in both straightway and angleway versions which is easy to connect

• Hermetic tight design for solder versions with low risk of external leakage

• Built-in damping piston that makes the valves suitable for installation in lines where pulsation can occur, e.g. in the discharge line from the compressor

• NRVH type check valve is with stronger spring and it‘s recommended to use for compressors in parallel (i.e. power packs) where higher level of pulsation and vibration are expected

• Low pressure drop during operation

• Oversize connections provide exibility in use

AI150286435592en-000901

Check valve, type NRV and NRVH

Functions

NRV/NRVH are used to control the unidirectional ow of refrigerant so as to prevent backow. When selecting the right Danfoss check valve, it’s recommended to use Coolselector which is a Danfoss calculation and selection software. When dimensioning and selecting Danfoss check valves for mounting into the compressor discharge line, it is important to be aware of the following:

The dierential pressure across the valve must always be higher than the given minimum pressure drop at which the valve is open. This also applies to lowest capacities for compressor with capacity regulation. NRVH type check valve is with stronger spring and it’s recommended to use for compressors in parallel (i.e. power packs) where higher level of pulsation and vibration are expected.

Danfoss

9G8082

Check valve, type NRV and NRVH

Applications

Typical applications for NRV and NRVH valves are:

• Cold room

• Heat pump

• VRF

• Chiller

Figure 1: Application Diagram

Valve type

Connection type

Max. working

pressure

Refrigerants

(PS/MWP)

NRV/NRVH 6-19

Straight-way - are

46 bar/ 667 psig

R134a, R22/R407C, R404A/R507, R407A, R407F, R407H, R410A, R448A, R449A, R449B, R450A, R452A, R452B, R454A, R454B, R454C, R455A, R513A, R515B, R516A, R1233zd(E), R1234ze(E), R1234yf

NRV/NRVH 6s-19s

(1)

Straight-way - solder

49 bar / 710 psig

R134a, R22/R407C, R290, R32, R404A/R507, R407A, R407F, R407H, R410A, R448A, R449A, R449B, R450A, R452A, R452B, R454A, R454B, R454C, R455A, R513A, R515B, R516A, R600, R600a, R1233zd(E), R1234ze(E), R1234yf, R1270

NRV/NRVH 22s-35s

(1)

Angle-way - solder

46 bar/ 667 psig

R134a, R22/R407C, R290

(2)

, R404A/R507, R407A, R407F, R407H, R410A,

R448A, R449A, R449B, R450A, R452A, R452B

(2)

, R454A

(2)

, R454B

(2)

, R454C

(2)

,

R455A

(2)

, R513A, R515B, R516A

(2)

, R600

(2)

, R600a

(2)

, R1233zd(E), R1234ze(E),

R1234yf

(2)

, R1270

(2)

NRV/NRVH 22s E-35s E

(1)

Angle-way - solder

49 bar / 710 psig

R290, R32, R452B, R454A, R454B, R454C, R455A, R516A, R600, R600a, R1234ze(E), R1234yf, R1270

Refrigerant oil

POE, PAG (PVE, PAO)

Check valve, type NRV and NRVH

Media

Table 1: Media

(1)

Oversize connections

(2)

NRV/NRVH 28s



NOTE:

• For a complete list of approved refrigerants, visit http://store.danfoss.com/ and search for individual code numbers, where refrigerants are listed as part of product details.

• This product is approved for R290, R32, R452B, R454A, R454B, R454C, R455A, R516A, R600, R600a, R1234ze(E), R1234yf and R1270 by ignition source assessment in accordance to standard EN ISO 80079-36.

• NRV/NRVH is not suitable for oil line application. For detailed information please contact Danfoss.

• Flare/face seal connections are only approved for A1 and A2L refrigerants.

• R32 can only be used for 49bar NRV/NRVH.

• R1234ze can be used for NRV size up to 35s according to the PED category I, Fluid II

(1)

-35s

can be used with ammable refrigerants, without certicate of PED Fluid Group 1, category II

-35s

can be used with ammable refrigerants, without certicate of PED Fluid Group 1, category II

Technical data

Values

Max. working pressure

See ordering table

Media temperature range

See ordering table

Environmental transport/storage temperature and humidity

-40 – 65 °C /-40 – 150 °F. Air humidity: RH≤95%

Flow direction

Single ow

Serviceable

No

Box label

Product label

Position

Inscription

Explanation

Box label; Product label

Check valve

Product name

Box label

020B1010

Code number for ordering

Box label

NRV 6s

Product type; no numeral on product label

Box label

Straightway

Direction

Box label

ODF 1/4 in

Connection size and type

Box label; Product label

PS 49 bar/MWP 710 psig

Max. working pressure in bar and psig

Box label

BE4520C

Code for production place and time (BE = Wuqing, week 45, year 2020, weekday C = Wednesday)

Box label; Product label

MADE IN CHINA

Manufacturing site acc. to EN standards

Box label

EAN code

Barcode for individual code no. identication according to EAN standard

Product label

Min/Max Temp: -50/+155 °C

Media temperature range, min and max.

Product label

Arrow

Flow direction indicator

Box label; Product label

Additional information: Relevant approval authority logos

-

Check valve, type NRV and NRVH

Product specication

Technical data

Table 2: Technical data

Identication

Relevant product data is available on the product and box label. An example of a box label and product label are shown, including an explanation of the content.

Table 3: Box label & product label (example)

Table 4: Product and label text

Design and materials

The pressure of the uid passing through a refrigeration system opens the valve, while any reverse ow closes the valve.

In NRV/NRVH check valves a sealing disc is activated by the spring to close or open the valve, and the force of the spring determines the dierential opening pressure.When the refrigerant ows through the valve and the dierential pressure is more than Min. opening pressure, the piston will move to stop face and compress the spring, then the valve will open.

NRV/NRVH valves are equipped with a damping piston for improved performance in lines where pulsations can occur, e.g. in the discharge line from a compressor.

Straightway solder version

Angleway solder version

1

2

4

5

6

7

8

9

3

Danfoss

20-8028

1

2

4

5

6

10

7

Position

Description

Material

1

Connection tube

Copper

2

Solder ring

Ag alloy

3

Washer

Brass4Disk

PTFE with glass ber

5

Piston

Brass6Spring

Stainless steel

7

Valve body

Brass8Guide

Brass

9

Stop face

Stainless steel

10

Cover

Brass

Direction

Inlet

Outlet

mm connections

Inch connections

Straightway

Flare

-

¼ in x ¼ in ⅜ in x ⅜ in ½ in x ½ in ⅝ in x ⅝ in ¾ in x ¾ in

Straightway

Solder ODF

6 mm x 6 mm 10 mm x 10 mm 12 mm x 12 mm 16 mm x 16 mm 18 mm x 18 mm 19 mm x 19 mm 22 mm x 22 mm

¼ in x ¼ in ⅜ in x ⅜ in ½ in x ½ in ⅝ in x ⅝ in ¾ in x ¾ in ⅞ in x ⅞ in

Angleway

Solder ODF

22 mm x 22 mm 28 mm x 28 mm 35 mm x 35 mm 42 mm x 42 mm

⅞

in x ⅞ in

1

⁄8 in x 1 1⁄8 in

1

3

⁄8 in x 1 3⁄8 in

1

5

⁄8 in x 1 5⁄8 in

Check valve, type NRV and NRVH

Valve selection based on capacity calculation

As for extended capacity calculations and valve selection based on capacities and refrigerants, please refer to Coolselector®2. Rated and extended capacities are calculated with the Coolselector®2 calculation engine to ARI standards with the ASEREP equations based on laboratory measurements of selected valves.

Connections

Standard NRV/NRVH versions can be provided with straightway and angleway, connection types Flare or Solder ODF in a wide variety of connection sizes. Solder versions are with extended ends copper connections, are versions with brass connections.

Table 5: Connections

Dimensions and Weights

We have chosen to show dimensions of the major versions.

You will nd downloadable dimension drawings for individual code numbers on Danfoss store as part of the Visuals tab for individual code numbers.

Weights also dier depending on the design of the individual code numbers. Weights are available as part of the technical data for individual code numbers on Danfoss store.

S

L

Type

SAE Flare

Flare

L

Spanner ats S

Net weight

[in.]

Thread

[mm]

[kg]

NRV 6

¼

7

⁄16-20UNF-2A

55190.072

NRV 10

3⁄85

⁄8-18UNF-2A

60190.088

NRV 12

½

¾-16UNF-2A

70240.14

NRV 16

5⁄87

⁄8-14UNF-2A

81280.206

NRV 19

3

⁄4

1

⁄16-14UNS-2A

95340.344

Type

Connection Size

Connection toler‐

ance

LL1øD

Net weight

[in.]

[mm]

[kg]

NRV/NRVH 6s

¼

6

+0.065/+0.155

92718

0.05

NRV/NRVH 6s

(1)

3

⁄8

10

+0.06/+0.13959180.06

NRV/NRVH 10s

3

⁄8

10

+0.065/+0.155

109918

0.05

NRV/NRVH 10s

(1)

½

12

+0.065/+0.155

1091018

0.06

NRV/NRVH 12s

½

12

+0.065/+0.155

1311022

0.09

NRV/NRVH 12s

(1)

5

⁄8

16

+0.065/+0.155

1311222

0.09

NRV/NRVH 16s

5

⁄8

16

+0.065/+0.155

1391228

0.16

NRV/NRVH 16s

(1)

—

18

+0.065/+0.155

1391428

0.17

NRV/NRVH 16s

(1)

¾

19

+0.065/+0.155

1391428

0.17

NRV/NRVH 19s

—

18

+0.065/+0.155

1651434

0.27

NRV/NRVH 19s

¾

19

+0.065/+0.155

1651434

0.28

NRV/NRVH 19s

(1)

7

⁄8

22

+0.075/+0.185

1651734

0.28

Check valve, type NRV and NRVH

Flare straightway version

Figure 2: Flare straightway version

Table 6: Flare straightway version

Solder straightway version

Figure 3: Solder straightway version

Table 7: Solder straightway version

(1)

Oversize connections

Type

Connection size

Connection

tolerance

H1H2L1L

2

øD

Net weight

[in.]

[mm]

[kg]

NRV/NRVH 22s

7

⁄8

22

+0.075/+0.185

9448178737

0.584

NRV/NRVH 22s

(1)

1

⁄8

28

+0.075/+0.185

9448228737

0.616

NRV/NRVH 28s

1

⁄8

28

+0.075/+0.185

1416720

123491.330

NRV/NRVH 28s

(1)

1

3

⁄8

35

+0.09/+0.23

1416725

123491.478

NRV/NRVH 35s

1

3

⁄8

35

+0.09/+0.23

1416725

123491.400

NRV/NRVH 35s

(1)

1

5

⁄8

42

+0.09/+0.23

1416729

123491.388

Check valve, type NRV and NRVH

Solder angleway connection

Figure 4: Solder angleway connection

Table 8: Solder angleway connection

(1)

Oversize connections

Valve

type

SAE Flare

Flare ext.

× ext.

Min. OPD Δp

(1)

Kv

(2)

Cv

(2)

Max.

working

pressure:

PS/MWP

Media

tempera‐

ture

range

PED

category

[Fluid

Group 1]

PED

category

[Fluid

Group 2]

Multi pack

Industrial pack

[in.]

[bar]

[psi]

[m3/h]

[gal/min]

Code no.

Qty/ pack

Code no.

Qty/ pack

NRV 6

1/4

0.07

1.01

0.56

0.65

46 bar /

667 psig

-50 °C -

140 °C /

-58 °F 285 °F

Art. 4.3

020-1040

25

020-0138

140

NRV 10

3/8

0.07

1.01

1.2

1.39

020-104125--NRV 12

1/2

0.05

0.72

2.05

2.37

020-104225--NRV 16

5/8

0.05

0.72

3.6

4.16

020-104325--NRV 19

3/4

0.05

0.72

5.5

6.36

020-104424-

-

Check valve, type NRV and NRVH

Ordering

NRV/NRVH code numbers described in this data sheet are standard code numbers, i.e. made to stock.Besides code numbers made to stock NRV/NRVH is also made to order. Make to order options include:

• Mechanical connection type

• Mechanical connection size

Multipack contains several items, individually packed, so that customers can purchase 1 item and receive all relevant documentation.

Industrial pack contains several items that are not individually packed. Industrial packs cannot be broken down, and will only contain documentation on pack level, not on item level.

Straightway Flare Version without are nut

Table 9: Straightway Flare Version without are nut

(1)

Δ p =Minimum Opening Pressure Dierential

(2)

The Kv / Cv is the ow of water in [m3/h – gal/min] at a pressure drop across valve of 1 bar/14.5 psig, ρ = 1000 kg/m3 / 62.4 lb/ft3

Valve type

Connection Solder

ODF × ODF

Min. OPD Δp

(2)

Kv

(3)

Cv

(3)

Max.

working

pres‐ sure:

PS/MWP

Media

temper‐

ature

range

PED

category

[Fluid

Group 1]

PED

category

[Fluid

Group 2]

Multi pack

Industrial pack

[in.]

[mm]

[bar]

[psi]

[m3/h]

[gal/ min]

Code no.

Qty/

pack

Code no.

Qty/

pack

NRV 22s

7/8220.04

0.58

8.5

9.83

46 bar /

667 psig

-50 °C 140 °C

/

-58 °F 285 °F

Art. 4.3

020-1020

18

020-115212NRVH 22s

7/8220.30

4.35

8.5

9.83

020-1032

18

020-0129

12

NRV 22s

(1)

1 1/8-0.04

0.58

8.5

9.83

020-106018---280.04

0.58

8.5

9.83

020-105518-

-

NRVH 22s

(1)

1 1/8-0.30

4.35

8.5

9.83

020-107218---280.30

4.35

8.5

9.83

020-106718-

-

NRV 28s

1 1/8-0.04

0.58

16.5

19.07

020-1021

6

020-012612-280.04

0.58

16.5

19.07

020-1025

6

020-1153

12

NRVH 28s

1 1/8-0.30

4.35

16.5

19.07

020-10296---280.30

4.35

16.5

19.07

020-1033

6

020-0131

12

NRV 28s

(1)

1 3/8350.04

0.58

16.5

19.07

-

020-10566--NRVH 28s

(1)

1 3/8350.30

4.35

16.5

19.07

020-10686--NRV 35s

1 3/8350.04

0.582933.52

020-1026

6

020-115412NRVH 35s

1 3/8350.30

4.352933.52

020-1034

6

020-0127

12

NRV 35s

(1)

1 5/8-0.04

0.582933.52

Cat. 1

020-10616---420.04

0.582933.52

020-10276-

-

NRVH 35s

(1)

1 5/8-0.30

4.352933.52

020-10736---420.30

4.352933.52

020-10356-

-

Check valve, type NRV and NRVH

Angleway Solder ODF Version, PS = 46 bar

Table 10: Angleway Solder ODF Version, PS = 46 bar

(1)

Oversize connections

(2)

Δ p =Minimum Opening Pressure Dierential

(3)

The Kv / Cv is the ow of water in [m3/h – gal/min] at a pressure drop across valve of 1 bar/14.5 psig, ρ = 1000 kg/m3 / 62.4 lb/ft3

Valve

type

Connection

Solder ODF × ODF

Min. OPD

Δp

(2)

Kv

(3)

Cv

(3)

Max.

working

pres‐ sure:

PS/MWP

Media

temper‐

ature

range

PED

category

[Fluid

Group 1]

PED

category

[Fluid

Group 2]

Multi pack

Industrial pack

[in.]

[mm]

[bar]

[psi]

[m3/h]

[gal/ min]

Code no.

Qty/

pack

Code no.

Qty/

pack

NRV 22s E

7/8220.04

0.58

8.5

9.83

49 bar /

710 psig

-50 °C -

155 °C /

-58 °F 311 °F

Art. 4.3

-

020-302018--NRVH 22s E

7/8220.30

4.35

8.5

9.83

020-303218-

-

NRV 22s E

(1)

1 1/8-0.04

0.58

8.5

9.83

020-306018--　280.04

0.58

8.5

9.83

020-305518-

-

NRVH 22s E

(1)

1 1/8-0.30

4.35

8.5

9.83

020-307218--　280.30

4.35

8.5

9.83

020-306718-

-

NRV 28s E

1 1/8-0.04

0.58

16.5

19.07

020-30216--　280.04

0.58

16.5

19.07

020-30256-

-

NRVH 28s E

1 1/8-0.30

4.35

16.5

19.07

020-30296--　280.30

4.35

16.5

19.07

020-30396--NRV 28s E

(1)

1 3/8350.04

0.58

16.5

19.07

Cat. 2

020-30566--NRVH 28s E

(1)

1 3/8350.30

4.35

16.5

19.07

020-30686--NRV 35s E

1 3/8350.04

0.582933.52

020-30266--NRVH 35s E

1 3/8350.30

4.352933.52

020-30366-

-

NRV 35s E

(1)

1 5/8-0.04

0.582933.52

020-30616---420.04

0.582933.52

020-30276-

-

NRVH 35s E

(1)

1 5/8-0.30

4.352933.52

020-30736---420.30

4.352933.52

020-30356-

-

Check valve, type NRV and NRVH

Angleway Solder ODF Version, PS = 49 bar

Table 11: Angleway Solder ODF Version, PS = 49 bar

(1)

Oversize connections

(2)

Δ p =Minimum Opening Pressure Dierential

(3)

The Kv / Cv is the ow of water in [m3/h – gal/min] at a pressure drop across valve of 1 bar/14.5 psig, ρ = 1000 kg/m3 / 62.4 lb/ft3

Valve type

Connection Sol‐

der ODF × ODF

Min. OPD Δp

(2)

Kv

(3)

Cv

(3)

Max.

work‐

ing

pres‐

sure:

PS/MWP

Media

temper‐

ature

range

PED

category

[Fluid

Group

1]

PED

category

[Fluid

Group

2]

Multi pack

Industrial pack

[in.]

[mm]

[bar]

[psi]

[m3/h]

[gal/ min]

Code no.

Qty/

pack

Code no.

Qty/

pack

NRV 6s

1/4-0.04

0.58

0.67

0.77

49 bar /

710 psig

-50 °C 155 °C

/

-58 °F 311 °F

Art. 4.3

020B1010

25

020B0125

88-6

0.04

0.58

0.67

0.77

020B1014

25

020B1156

88

NRV 6s

(1)

3/8-0.04

0.58

0.67

0.77

020B1057

25

020B1191

88-10

0.04

0.58

0.67

0.77

020B1050

25

020B1082

88

NRVH 6s

(1)

3/8-0.20

2.90

0.67

0.77

020B106925---100.20

2.90

0.67

0.77

020B106225-

-

NRV 10s 3/8-0.04

0.58

1.64

1.90

020B1011

25

020B1168

40-10

0.04

0.58

1.64

1.90

020B1015

25

020B0136

88

NRVH 10s

1/2-0.20

2.90

1.64

1.90

020B104625--　120.20

2.90

1.64

1.90

020B1036

25

020B0132

88

NRV 10s

(1)

1/2-0.04

0.58

1.64

1.90

020B1058

25

020B0165

40-12

0.04

0.58

1.64

1.90

020B1051

25

020B0161

40

NRVH 10s

(1)

1/2-0.20

2.90

1.64

1.90

020B107025---120.20

2.90

1.64

1.90

020B106325-

-

NRV 12s 1/2-0.02

0.29

2.50

2.89

020B1012

24

020B1155

40-12

0.02

0.29

2.50

2.89

020B1016

24

020B0137

40

NRVH 12s

1/2-0.20

2.90

2.50

2.89

020B1039

24

020B1239

40-12

0.20

2.90

2.50

2.89

020B1037

24

020B0133

40

NRV 12s

(1)

5/8160.02

0.29

2.50

2.89

020B1052

24

020B0162

54

NRVH 12s

(1)

5/8160.20

2.90

2.50

2.89

020B106424--NRV 16s

5/8160.02

0.29

4.00

4.62

020B1018

24

020B1150

54

NRVH 16s

5/8160.20

2.90

4.00

4.62

020B1038

24

020B0134

54

NRV 16s

(1)

-180.02

0.29

4.00

4.62

020B105324--NRVH 16s

(1)

-180.20

2.90

4.00

4.62

020B106524--NRV 16s

(1)

3/4190.02

0.29

4.00

4.62

020B105924--NRVH 16s

(1)

3/4190.20

2.90

4.00

4.62

020B107124--NRV 19s

-180.02

0.29

6.50

7.51

020B101728--NRVH 19s

-180.14

2.03

6.50

7.51

020B100828--NRV 19s

3/4190.02

0.29

6.50

7.51

020B101928--NRVH 19s

3/4190.14

2.03

6.50

7.51

020B102328--NRV 19s

(1)

7/8220.02

0.29

6.50

7.51

020B1054

28

020B1091

54

NRVH 19s

(1)

7/8220.14

2.03

6.50

7.51

020B106628-

-

Check valve, type NRV and NRVH

Straightway Solder ODF Version

Table 12: Straightway Solder ODF Version

(1)

Oversize connections

(2)

Δ p =Minimum Opening Pressure Dierential

(3)

The Kv / Cv is the ow of water in [m3/h – gal/min] at a pressure drop across valve of 1 bar/14.5 psig, ρ = 1000 kg/m3 / 62.4 lb/ft3

File name

Document type

Document topic

Approval authority

Д-DK.БЛ08.B.03644

EAC Declaration

Machinery & Equipment

EAC RU

Д-DK.РА01.B.72124_20

EAC Declaration

PED

EAC RU

033F4001.AE

Manufacturers Declaration

PED

Danfoss

033F4002.AE

EU Declaration

PED

Danfoss

033F4006

Manufacturers Declaration

China RoHS

Danfoss

033F4010

Manufacturers Declaration

RoHS

Danfoss

033F4017.AA

Manufacturers Declaration

EN ISO 14903:2017 Level A1/B1

Danfoss

UA.089.D.00188-17

UA Declaration

PED

LLC CDC EURO TYSK

UA.TR-089.0993-17

Pressure - Safety Certicate

PED

LLC CDC EURO TYSK

UL SA7200

Mechanical - Safety Certicate

UL

Check valve, type NRV and NRVH

Certicates, declarations, and approvals

The list contains all certicates, 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.

Certicates, declarations, and approvals

Table 13: Certicates, declarations, and approvals

Online support

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The Danfoss Product Store

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Find technical documentation

Find the technical documentation you need to get your project up and running. Get direct access to our ocial collection of data sheets, certicates 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 specically 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.

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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.

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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 specications 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.

Danfoss NRV, NRVH Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual