Danfoss NRVA Data sheet

Data Sheet

Check valve Type NRVA

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

• Classication: DNV, CRN, BV, EAC etc. To get an updated list of certication 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 specic refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Description

Values

Temperature range

-50 °C – 140 °C / -58 °F – 284 °F

Pressure range

Max. working pressure: 40 bar / 580 psig

No.

Part

Material

DIN

ISO

ASTM

1

Housing

Steel

G20Mn5QT

(1)

EN10213-3

P285QH

EN10222-4

LCC, A352

LF2,A350

2

Flanges

Steel

RSt. 37-2, 10025

Fe360 B, 630

Grade C, A 283

3

Valve cone

Stainless steel

Teon

5

Spring

Steel9Bolts

Stainless steel

A2-7010Nut

Stainless steel

11

Gasket

Non asbestos

12

Valve seat

Steel

Check valve, Type NRVA

Product specication

Pressure and temperature

Table 1: Pressure and temperature data

Design

Gaskets:

Do not contain asbestos.

Valve cone:

The valve cone has a teon tightening ring. Teon tightening ring renders perfect sealing at a minimum closing force.

Material specication

Figure 1: Material specication for NRVA check valves

Table 2: Material specication for NRVA check valves

(1)

NRVA 40 / NRVA 50 housing material is TTSt 35N until January 2006

Connections

There is a wide range of connection possibilities with NRVA check valves:

DIN

ANSI

SOCSAFPT

ø

Type

L

1

(1)

B

Weight

NRVA 15 – 20

mm

1155080

1.4 kg

in.

4.53

1.97

3.15

3.09 lb

NRVA 25 – 32

mm

13874∅

83

3.0 kg

in.

5.43

2.91

∅

3.27

6.61 lb

NRVA 40 – 50

mm

172

94.5

∅

103

5.0 kg

in.

6.77

3.72

∅

4.05

11.02 lb

NRVA 65

mm

226

124

∅

185

13.0 kg

in.

8.9

4.88

∅

7.28

28.66 lb

Check valve, Type NRVA

• Welding, DIN (2448)

• Welding, ANSI (B 36.10)

• Welding socket, ANSI (B 16.11)

• Solder connection, DIN (2856)

• Solder connection, ANSI (B 16.22)

• FPT internal thread, NPT (ANSI/ASME B 1.20.1)

Flange connections

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.

Table 3: Flange connections

Dimensions and weights

Figure 2: Dimensions and weights

Table 4: Dimensions and weights

(1)

Without

anges

For use with valve housing size

Size mm

Size in.

ØD mm

T mm

ØD in.

T in.

Flange type

Code no.

NRVA 15/20

10

3

⁄8

1820.71

0.079

1.3

027N1112

NRVA 15/20

15

1

⁄2

22

2.5

0.866

0.098

1.3

027N1115

NRVA 15/20

20

3

⁄4

26.9

2.3

1.059

0.091

1.3

027N1120

NRVA 25/32

25

1

33.7

2.6

1.327

0.103

4

027N1026

NRVA 25/32

32

1

⁄4

42.4

2.6

1.669

0.102

4

027N1033

NRVA 40/50

40

1

⁄2

48.3

2.6

1.902

0.103

6

027N1042

NRVA 40/50

50

2

60.3

2.9

2.37

0.11

6

027N1051

NRVA 65

65

2

1

⁄2

76.1

2.930.11

8

027N1055

For use with valve housing size

Size mm

Size in.

ØD mm

T mm

ØD in.

T in.

Flange type

Code no.

NRVA 15/20

10

3

⁄8

17.2

3.2

0.677

0.126

1.3

027N2020

NRVA 15/20

15

1

⁄2

21.3

3.7

0.839

0.146

1.3

027N2021

NRVA 15/20

20

3

⁄4

26.941.059

0.158

1.3

027N2022

NRVA 25/32

25133.7

4.6

1.327

0.181

4

027N2023

NRVA 25/32

32

1

⁄4

42.4

4.9

1.669

0.193

4

027N2024

NRVA 40/50

40

1

⁄2

48.3

5.1

1.902

0.201

6

027N2025

NRVA 40/50

50260.3

3.9

2.37

0.15

6

027N2026

NRVA 65

65

2

1

⁄2

73

5.230.2

8

027N2027

For use with valve housing size

Size mm

Size in.

ID mm

T mm

ID in.

T in.

L mm

L in.

Flange

type

Code no.

NRVA 15/20

10

3

⁄8

17.8

4.1

0.701

0.161100.394

1.3

027N2010

NRVA 15/20

15

1

⁄2

22

4.8

0.866

0.189100.394

1.3

027N2011

NRVA 25/32

20

3

⁄4

27.451.079

0.197130.512

4

027N2012

NRVA 25/32

25134.1

5.8

1.343

0.228130.512

4

027N2013

NRVA 25/32

32

1

⁄4

42.961.689

0.236130.512

4

027N2016

NRVA 40/50

40

1

⁄2

49

6.5

1.929

0.254130.512

6

027N2015

For use with valve housing size

Size mm

ID mm

L mm

Flange type

Code no.

NRVA 15/20

16

16.07151.3

027L1116

NRVA 15/20

22

22.08221.3

027L1122

NRVA 25/32

35

35.07254

027L2335

NRVA 40/50

54

54.09334

027L2554

For use with valve housing size

Size in.

ID in.

L in.

Flange type

Code no.

NRVA 15/20

5

⁄8

0.628

0.807

1.3

027L1117

NRVA 15/20

7

⁄8

0.878

0.866

1.3

027L1123

NRVA 25/32

1

3

⁄8

1.375

0.984

4

027L2335

NRVA 40/50

2

1

⁄8

2.125

1.3

4

027L2554

For use with valve housing size

Size mm

Size in.

Inside pipe thread

Flange type

Code no.

NRVA 15/20

10

3

⁄8

(

3

⁄8 × 18 NPT)

1.3

027G1005

NRVA 15/20

15

1

⁄2

(

1

⁄2 × 14 NPT)

1.3

027G1006

NRVA 25/32

20

3

⁄4

(

3

⁄4 × 14 NPT)

4

027G1007

Check valve, Type NRVA

Ordering

Ordering Flange connections

Table 5: Butt welding DIN (2448)

Table 6: Butt welding ANSI B 36.10

Table 7: Socket welding ANSI (B 16.11)

Table 8: Soldering DIN (2856)

Table 9: Soldering (ANSI B 16.22)

Table 10: FPT inside pipe thread, NPT (ANSI/ASME B 1.20.1)

 NOTE:

The anges sets are exclusive gaskets, bolts and nuts.

Type

Weld ange

connection

Code no.

∆p

(1)

kv value

(2)

Cv value

(3)

Valve

Spec. spring

(4)

With standard spring

With spec. spring

(4)

in.

bar

psig

bar

psig

m3/h

gal/min

NRVA 15

1

⁄2

020-2000

020-2307

0.12

1.7

0.3

4.456

NRVA 20

3

⁄4

020-2001

020-2307

0.12

1.7

0.3

4.467

NRVA 251020-2002

020-2317

0.12

1.7

0.3

4.41922

NRVA 32

1

⁄4

020-2003

020-2317

0.12

1.7

0.3

4.42023

NRVA 40

1

⁄2

020-2004

020-2327

0.0710.4

5.84451

NRVA 502020-2005

020-2327

0.0710.4

5.84451

NRVA 65

2

1

⁄2

020-2006

020-2337

0.0710.4

5.87587

Type

Code no.

NRVA 15

020-2020

NRVA 20

020-2020

NRVA 25

020-2022

NRVA 32

020-2022

NRVA 40

020-2024

NRVA 50

020-2024

NRVA 65

020-2026

Type

Dimensions

Code no.

NRVA 15 / 20

M 12 × 115 mm

006-1107

NRVA 25 / 32

M 12 × 148 mm

006-1135

NRVA 40 / 50

M 12 × 167 mm

006-1137

NRVA 65

M 16 × 200 mm

006-1138

Check valve, Type NRVA

Ordering complete Valves

Figure 3: Complete valves

Table 11: Complete valves incl. DIN 2448 ange:

(1)

∆p = the minimum pressure dierential at which the valve is completely open

(2)

The kv value is the ow of water in m3/h at a pressure drop across valve of 1 bar, ρ = 1000 kg/m3.

(3)

The Cv value is the ow of water in gal/min at a pressure drop across valve of 1 psig, ρ = 10 lbs/gal.

(4)

A special type spring can be supplied to replace the standard valve spring

Figure 4: Valve body without anges

Table 12: Valve body without anges

Figure 5: Staybolts and gaskets

Table 13: Staybolts and gaskets

Example: NRVA 32 with 1

1

⁄4" anges for ANSI butt welding: NRVA 32 + bolts + anges (set) = 020-2022 + 006-1135 +

027N2024

File name

Document type

Document topic

Approval authority

RU Д-DK.БЛ08.B.03644

EAC Declaration

Machinery & Equipment

EAC

0045 202 1204 Z 00354 19 D 001(00)

Pressure - Safety Certicate

TÜV

RU Д-DK.РА01.B.72124_20

EAC Declaration

PED

EAC

EU 033F0685.AK

EU Declaration

EMCD/PED

Danfoss

AQSIQ TS271067J-2023

Manufacturing Permission

TSG

MD 033F0691.AE

Manufacturers Declaration

RoHS

Danfoss

MD 033F0686.AH

Manufacturers Declaration

PED

Danfoss

033F0453.AD

Manufacturers Declaration

ATEX

Danfoss

CRN.0C21115.512346789YTN

Pressure - Safety Certicate

CRN

TSSA

Check valve, Type NRVA

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.

Table 14: Valid approvals

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Danfoss NRVA Data sheet

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Frequently Asked Questions

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