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.
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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)
(1)
NRVA 40 / NRVA 50 housing material is TTSt 35N until January 2006
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:
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DIN
ANSI
SOCSAFPT
ø
Type
L
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)
(1)
Without
Without
anges
anges
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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
1
4
42.4
2.6
1.669
0.102
4
027N1033
NRVA 40/50
40
1
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
1
4
42.4
4.9
1.669
0.193
4
027N2024
NRVA 40/50
40
1
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
1
4
42.961.689
0.236130.512
4
027N2016
NRVA 40/50
40
1
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.
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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
1
4
020-2003
020-2317
0.12
1.7
0.3
4.42023
NRVA 40
1
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)
(1)
∆p = the minimum pressure dierential at which the valve is completely open
∆p = the minimum pressure dierential at which the valve is completely open
(2)
(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.
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)
(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.
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)
(4)
A special type spring can be supplied to replace the standard valve spring
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
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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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